Introducing to Monit

According to the project website

Monit is a small Open Source utility for managing and monitoring Unix systems. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.

One of the most important features of Monit is that it is quite easy to deploy on supported systems. These include Linux, BSD, and Solaris. So it is compatible with our distribution.

For example, Monit can act if an error situation should occur, e.g.; if sendmail is not running, Monit can start sendmail again automatically or if apache is using too much resources.

also, it can monitor the main system resources such as RAM, CPU, and disk space.

So, let’s get started

Install Monit on Ubuntu 20.04

First, connect to your server via SSH and update it

sudo apt update
sudo apt upgrade

Monit is present in the official Ubuntu repositories so to install it, just run this command:

sudo apt install monit
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  default-mta | postfix | mail-transport-agent sysvinit-core
The following NEW packages will be installed:
  monit
0 upgraded, 1 newly installed, 0 to remove and 24 not upgraded.
Need to get 320 kB of archives.
After this operation, 964 kB of additional disk space will be used.

At the end of the installation, you can check the status of the service

sudo systemctl status monit
● monit.service - LSB: service and resource monitoring daemon
     Loaded: loaded (/etc/init.d/monit; generated)
     Active: active (running) since Tue 2021-08-03 20:27:56 CEST; 31s ago
       Docs: man:systemd-sysv-generator(8)
      Tasks: 1 (limit: 2286)
     Memory: 1.3M
     CGroup: /system.slice/monit.service
             └─1505 /usr/bin/monit -c /etc/monit/monitrc

Aug 03 20:27:56 osradar systemd[1]: Starting LSB: service and resource monitoring daemon...
Aug 03 20:27:56 osradar monit[1494]:  * Starting daemon monitor monit
Aug 03 20:27:56 osradar monit[1494]:    ...done.
Aug 03 20:27:56 osradar systemd[1]: Started LSB: service and resource monitoring daemon.

So, Monit is running fine.

Enabling the web interface

To make monitoring more convenient for you, enable the web interface of the program.

To do this, edit the Monit config file /etc/monit/monitrc.

First, make a backup of it:

sudo cp /etc/monit/monitrc /etc/monit/monitrc.bak

Now edit it using nano.

sudo nano /etc/monit/monitrc

note the lines starting with set httpd port 2812 and and allow admin:monit which are commented out and uncomment them

set httpd port 2812 and
allow admin:password

You can assign any password you want after admin: save the changes and close the editor.

You can check the syntax of the file for any errors.

sudo monit -t

And to apply the changes, restart monit.

sudo systemctl restart monit

Now open your web browser and go to http://your-server:2812 and after entering the password you will see the following.

And you can check the Monit runtime.

Enabling services to monitor

By default, Monit has several service configurations that you can monitor. They are located in the /etc/monit/conf-available/ directory.

ls /etc/monit/conf-available/`
acpid apache2 at cron mdadm memcached mysql nginx openntpd openssh-server pdns-recursor postfix rsyslog smartmontools snmpd

To enable one, it is only necessary to make a symbolic link to the /etc/monit/conf-enabled/ folder, in the case of Apache, this would be

sudo ln -s /etc/monit/conf-available/apache2 /etc/monit/conf-enabled/`

And apply the changes by restarting Monit

sudo systemctl restart monit

So, enjoy it

Conclusion

Monit helps us to monitor the most critical services of the system from a comfortable graphical interface and with a very simple installation.

The post Install Monit on Ubuntu 20.04 to monitor the system services appeared first on Linux Windows and android Tutorials.

According to the Monitorix website

Monitorix is a free, open-source, lightweight system monitoring tool designed to monitor as many services and system resources as possible. It has been created to be used under production Linux/UNIX servers, but due to its simplicity and small size can be used on embedded devices as well.

One of its main advantages is that it is open-source and free. So, we can use it under almost any circumstances or project. In addition to this, it is quite lightweight so it will not be a nuisance on servers or computers with a rather short performance.

It is currently in active development adding new features, new graphs, and correcting bugs in the attempt to offer a great tool for daily systems administration of any professional server.

Although it was intended for Linux systems like CentOS or RHEL, it is perfectly compatible with many Linux distributions and BSD based systems like FreeBSD, OpenBSD and others,

So, let’s get started.

Install Monitorix on Ubuntu 20.04

The first thing we have to do for this post is to open the server and update it.

sudo apt update
sudo apt upgrade

Of course, you can also install it from a local computer.

Now, Monitorix is available from the official repositories of the distribution, so to install it, just run the following command

sudo apt install monitorix
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  fontconfig fontconfig-config fonts-dejavu-core libcairo2 libcgi-pm-perl libconfig-general-perl libdatrie1 libdbi-perl libdbi1 libemail-date-format-perl
  libencode-locale-perl libfile-listing-perl libfontconfig1 libgdbm-compat4 libgraphite2-3 libharfbuzz0b libhtml-parser-perl libhtml-tagset-perl libhtml-tree-perl
  libhttp-cookies-perl libhttp-date-perl libhttp-message-perl libhttp-negotiate-perl libhttp-server-simple-perl libio-html-perl libio-socket-ssl-perl
  liblwp-mediatypes-perl liblwp-protocol-https-perl libmailtools-perl libmime-lite-perl libnet-http-perl libnet-smtp-ssl-perl libnet-ssleay-perl libpango-1.0-0
  libpangocairo-1.0-0 libpangoft2-1.0-0 libperl5.30 libpixman-1-0 librrd8 librrds-perl libthai-data libthai0 libtimedate-perl libtry-tiny-perl liburi-perl libwww-perl
  libwww-robotrules-perl libx11-6 libx11-data libxau6 libxcb-render0 libxcb-shm0 libxcb1 libxdmcp6 libxext6 libxml-libxml-perl libxml-namespacesupport-perl
  libxml-sax-base-perl libxml-sax-perl libxml-simple-perl libxrender1 perl perl-modules-5.30 perl-openssl-defaults rrdtool
Suggested packages:
  libclone-perl libmldbm-perl libnet-daemon-perl libsql-statement-perl libdata-dump-perl libcrypt-ssleay-perl default-mta | mail-transport-agent libauthen-ntlm-perl
  perl-doc libterm-readline-gnu-perl | libterm-readline-perl-perl make libb-debug-perl liblocale-codes-perl
Recommended packages:
  libcgi-fast-perl libhtml-format-perl libmime-types-perl libauthen-sasl-perl libdata-dump-perl libhtml-form-perl libhttp-daemon-perl libxml-sax-expat-perl
The following NEW packages will be installed:
  fontconfig fontconfig-config fonts-dejavu-core libcairo2 libcgi-pm-perl libconfig-general-perl libdatrie1 libdbi-perl libdbi1 libemail-date-format-perl
  libencode-locale-perl libfile-listing-perl libfontconfig1 libgdbm-compat4 libgraphite2-3 libharfbuzz0b libhtml-parser-perl libhtml-tagset-perl libhtml-tree-perl
  libhttp-cookies-perl libhttp-date-perl libhttp-message-perl libhttp-negotiate-perl libhttp-server-simple-perl libio-html-perl libio-socket-ssl-perl
  liblwp-mediatypes-perl liblwp-protocol-https-perl libmailtools-perl libmime-lite-perl libnet-http-perl libnet-smtp-ssl-perl libnet-ssleay-perl libpango-1.0-0
  libpangocairo-1.0-0 libpangoft2-1.0-0 libperl5.30 libpixman-1-0 librrd8 librrds-perl libthai-data libthai0 libtimedate-perl libtry-tiny-perl liburi-perl libwww-perl
  libwww-robotrules-perl libx11-6 libx11-data libxau6 libxcb-render0 libxcb-shm0 libxcb1 libxdmcp6 libxext6 libxml-libxml-perl libxml-namespacesupport-perl
  libxml-sax-base-perl libxml-sax-perl libxml-simple-perl libxrender1 monitorix perl perl-modules-5.30 perl-openssl-defaults rrdtool
0 upgraded, 66 newly installed, 0 to remove and 72 not upgraded.
Need to get 14.4 MB of archives.
After this operation, 71.3 MB of additional disk space will be used.
Do you want to continue? [Y/n]

Once the installation is complete, the monitorix service will start, which is worth checking to avoid surprises.

sudo systemctl status monitorix

This way, we will notice that it is running without problems.

Monitorix Configurations

The Monitorix configuration resides in the /etc/monitorix/monitorix.conf file which we need to edit. But first, it is a good idea to back it up.

sudo cp /etc/monitorix/monitorix.conf /etc/monitorix/monitorix.conf.bak

Now you can do it with the help of the nano editor.

sudo nano /etc/monitorix/monitorix.conf

There are many options you can add/remove so it is best to visit the official documentation.

To apply any changes you make, you need to restart the service.

Using Monitorix on Ubuntu 20.04

When you have made all the changes you want, you can open your web browser and go to http://your-server:8080/monitorix to see the Monitorix interface. Remember that this port must be available.

The first thing you will see is the configuration of how the graphs are displayed. In this part, you can define the frequency, and which graphs to display.

Then you will see the first graphs. There you can measure CPU consumption, RAM, and so on.

Keep scrolling down and you will find other interesting graphs like disk and kernel usage.

So, enjoy it

Conclusion

Monitoring your server can be a great way to detect network problems. This tool allows us by day, month, and year to detect behavior far from our ideal.

So, share this post.

The post Monitoring your system with Monitorix on Ubuntu 20.04 appeared first on Linux Windows and android Tutorials.

Wireshark is a free and opensource web analyzer. It allows you to know from a quite technical point of view what is happening in your network. With this, you can make statistics, specific monitoring or simply know its traffic.

Some of the main features of Wireshark are:

• Deep inspection of hundreds of protocols, with more being added all the time.
• Live capture and offline analysis.
• Standard three-pane packet browser.
• Captured network data can be browsed via a GUI, or via the TTY-mode TShark utility.
  The most powerful display filters in the industry.
• Rich VoIP analysis.

And many more. However, one of the most outstanding features is that it is cross-platform. In other words, you can install it on Windows, Linux, FreeBSD, Solaris, and other systems.

So, let’s install Wireshark.

1. Install Wireshark on Ubuntu 20.04/18.04

To install Wireshark more easily on Ubuntu 16.04, it is necessary to use a PPA repository of its developers. We have two options to install, the developing version or the latest stable version. I’ll show you the process for both, but in this post, I’ll install the stable version. If you use Ubuntu 20.04/ 18.04 this is not necessary.

If you want to install the development version:

Open a terminal and run:

:~$ sudo add-apt-repository ppa:dreibh/ppa
:~$ sudo apt update
:~$ sudo apt install wireshark

And that’s it.

Install the stable version:

It is always best to install the stable version of any program. That’s to avoid major bugs and surprises. It is clear that no application is free of bugs, but stable versions are less prone to them.

Open a Terminal and add the external repository with this command:

:~$ sudo add-apt-repository ppa:wireshark-dev/stable

Next, refresh the APT cache.

:~$ sudo apt update

Then install Wireshark.

:~$ sudo apt install wireshark

During installation, we will be asked if we want Wireshark to be available to all users member of wireshark group. Say yes.

And that’s it.

2. Configuring Wireshark

First, check the version of Wireshark installed.

:~$ wireshark -v

Next, add your current user to the wireshark group so you can use it without problems.

:~$ sudo usermod -a -G wireshark $USER

Now, change dumpcap permissions. With this you will make it possible to run without permission problems.

:~$ sudo chgrp wireshark /usr/bin/dumpcap
:~$ sudo chmod 750 /usr/bin/dumpcap
:~$ sudo setcap cap_net_raw,cap_net_admin=eip /usr/bin/dumpcap

After you do these steps, run Wireshark from the main menu.

Now, you can start to monitor your network.

Note: some case you need to run wireshark as root user.

Conclusion

Wireshark is a vital tool for many sysadmin or network enthusiasts. Its installation is quite simple but its power is almost unmatched.

Please share this post with your friends.

The post How to install Wireshark on Ubuntu 20.04/18.04? appeared first on Linux Windows and android Tutorials.

According to the Github profile of the application, we have the following definition

Linux system monitor with the compactness and usefulness of Windows Task Manager to allow higher control and monitoring.

Now, one of the most striking features is that the appearance mimics that of the Windows 10 system monitor, with all that this implies.

But make no mistake, it’s a great application because the interface is quite clean and integrates very well with the desktop environment. It is still in an early stage of development so some features will not work well in other desktop environments such as Mate, XFCE, or Cinnamon. In particular, the process tab but don’t worry, support will be added in the future.

Some of the features of the application are:

• CPU, Memory, Disk, Disk, and Network resource monitoring graphs.
• CPU, Memory, Disk, Disk, Network Adapters, and Nvidia single GPU usage statistics
• List of disks mounted on the system
• You can get the list of processes running on the system. You can also sort and terminate them.
• It has a dark theme and starts with the theme you have set on the system

For now, the application is only packaged for Ubuntu 20.04 and 18.04 and their respective derivatives like Linux Mint and ElementaryOS.

Install SysMonTask on Ubuntu 20.04

The best way to install this kind of application is by using the official method provided by the developers. In this case, it is by using the PPA provided by the developers.

So, open a terminal and update Ubuntu

sudo apt update
sudo apt upgrade

And add the repository in question:

sudo add-apt-repository ppa:camel-neeraj/sysmontask

Now proceed to install by running

sudo apt install sysmontask

Then the developers advise us to launch the application for the first time via terminal with the command

sysmontask

Note: For Nvidia GPUs, nvidia-smi needs to be installed in your system.

When you run it, you will see the graphical interface, which is very reminiscent of Windows 10.

Also, you can see the process tab and check all system processes.

Conclusion

In Linux every day we have a lot of different applications, in this case, we have a system monitor that Windows users will feel identified with, making the transition easier for many of them.

The post Install SysMonTask on Ubuntu 20.04 – A Windows 10-style system monitor appeared first on Linux Windows and android Tutorials.

Sensu is a complete solution for monitoring and observability at scale. Sensu Go is designed to give you visibility into everything you care about: traditional server closets, containers, applications, the cloud, and more.

The application is composed of three elements:

• Backend: which is the server where the monitoring operations are performed.
• Sensuctl: is a command-line tool for managing resources within Sensu.
• Agent: This microprogram is installed on those devices that we want to monitor.

In this post, we will install the first two, and in another post the agent in another one.

Install Sensu GO Monitoring Tool on Ubuntu 20.04

Note:There are many ports that we need to open for the tutorial to work. The complete list can be found at this link.

As powerful as the application is, the reality is that installing Sensu Go is quite easy.

First, in a terminal session update Ubuntu 20.04

sudo apt update
sudo apt upgrade

After that, you have to install some necessary packages such as gnupg

sudo apt install curl gnupg unzip wget

Sensu Go provides us with a script that adds its repository to our system in a very convenient way:

curl -s https://packagecloud.io/install/repositories/sensu/stable/script.deb.sh | sudo bash
Detected operating system as Ubuntu/focal.
 Checking for curl…
 Detected curl…
 Checking for gpg…
 Detected gpg…
 Running apt-get update… done.
 Installing apt-transport-https… done.
 Installing /etc/apt/sources.list.d/sensu_stable.list…done.
 Importing packagecloud gpg key… done.
 Running apt-get update… done.
 The repository is setup! You can now install packages.

Once the repository is successfully added to the system, we can start the installation by running:

sudo apt install sensu-go-backend
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  sensu-go-backend
0 upgraded, 1 newly installed, 0 to remove and 53 not upgraded.
Need to get 15.2 MB of archives.
After this operation, 41.5 MB of additional disk space will be used.

Once the application has been successfully downloaded, it is necessary to download the default configuration file:

curl -L https://docs.sensu.io./sensu-go/latest/files/backend.yml -o backend.yml

And now move it to the correct location:

sudo mv backend.yml /etc/sensu/

After this, you will be able to manage Sensu as a system service. So, start it, enable it and check the status of the service

sudo systemctl start sensu-backend
sudo systemctl enable sensu-backend
sudo systemctl status sensu-backend

As everything is OK you have to start the Backend by assigning it a username and password.

sensu-backend init --interactive
? Cluster Admin Username: admin
? Cluster Admin Password: ******
? Retype Cluster Admin Password: ******
{"component":"backend.seeds","level":"info","msg":"seeding etcd store with intial data","time":"2021-02-17T17:15:36+01:00"}
{"component":"store","level":"warning","msg":"migrating etcd database to a new version","time":"2021-02-17T17:15:36+01:00"}
{"component":"store","database_version":1,"level":"info","msg":"successfully upgraded database","time":"2021-02-17T17:15:36+01:00"}
{"component":"store","database_version":2,"level":"info","msg":"successfully upgraded database","time":"2021-02-17T17:15:36+01:00"}

Assign a username and a strong password.

Then you need to install sensuctl by running:

sudo apt install sensu-go-cli

And then you have to configure it by running:

sensuctl configure
? Authentication method: username/password
? Sensu Backend URL: http://127.0.0.1:8080
? Namespace: default
? Preferred output format: tabular
? Username: admin
? Password: ******

Leave it as I currently show you. Remember that the username and password must be the same as the one you set in the previous step.

Testing the installation

After applying the changes, you can check that the backend is working through the web interface provided by the application.

So, access it from http://your-server:3000

And you will see the Login screen

Log in with your username and password and you will see the dashboard.

Obviously, it’s empty because we haven’t added any nodes. But the backend is ready.

Conclusion

In this post, you have learned how to install a part of Sensu GO that will allow you to monitor devices on a network. Although it is a very professional application, it is really easy to install.

The post How to install Sensu GO monitoring tool on Ubuntu 20.04? appeared first on Linux Windows and android Tutorials.

Netdata is a tool to visualize and monitor metrics in real time, optimized to accumulate all types of data. It is also optimized to accumulate all types of data, such as CPU usage, disk activity, SQL queries, website visits, etc. The tool is designed to visualize the now in as much detail as possible, allowing the user to get an overview of what is happening and what has just happened in your system or application.

Netdata is very easy to use

For the server monitoring conception conceived by Netdata, it is vital that everything is monitorable. It also has the following attributes.

• Out of the box: netdata supports auto-detection for everything. It collects more than 5000 metrics automatically, with zero configuration
• Basically, it can monitor practically in real time and achieves this without sacrificing performance in its execution.
• It is highly customizable thanks to HTML.
• Extensible: Anything you can get a number for, can be given to netdata, using its Plugin API.
• Scalable: netdata scales out, your web browser is the central netdata connecting all your servers together

Install Netdata on Ubuntu 20.04 / Debian 10

One of the main advantages of Netdata is that we can install it using the official Ubuntu repositories. This, apart from being secure, will give us the necessary stability in this kind of procedure.

So, open a terminal or SSH session.

When you start it, it updates Ubuntu completely.

sudo apt update
sudo apt upgrade

Once the system is fully upgraded, you can install Netdata by running the following command:

sudo apt install netdata

Netdata is also managed as a system service, so you can use the systemctl command to start it, stop it, or check its status.

Netdata is now available from http://localhost:19999 but you may want to configure Nginx as a reverse proxy.

Configuring Nginx as reverse proxy for Netdata

First, install Nginx from the Ubuntu repositories.

sudo apt install nginx

Next, create a new configuration file for Netdata

sudo nano /etc/nginx/conf.d/netdata.conf

And add the following:

upstream backend {
# the Netdata server
server 127.0.0.1:19999;
keepalive 64;
}
server {
# nginx listens to this
listen 80;
# the virtual host name of this
server_name angtest.ga;

    location / {

    proxy_set_header X-Forwarded-Host $host;
    proxy_set_header X-Forwarded-Server $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_pass http://backend;
    proxy_http_version 1.1;   
       proxy_pass_request_headers on;
    proxy_set_header Connection "keep-alive";
    proxy_store off;
}
}

Replace server_name with the name of your server.

It is also a good idea to secure your Netdata installation by installing and adding certificates to enable HTTPS.

So, install Certbot.

sudo apt install certbot python3-certbot-nginx

And create the new certificate for your domain by running:

sudo certbot --nginx --agree-tos --redirect --hsts --staple-ocsp --email you@example.com -d your-domain

Replace the email and -d values with your own.

Finally, restart Nginx.

sudo systemctl restart nginx

Using Netdata

Now you can open netdata from your web browser by opening https://your-domain and you will see the dashboard.

After that, just check the options on the left side of the screen.

So, enjoy it.

Conclusion

About Netdata you can say that it’s amazing how easy it is to use. Also, the app is really an Out-The-Box application because you simply don’t have to configure anything extra, it’s just install and go

The post How to install Netdata on Ubuntu 20.04 / Debian 10 appeared first on Linux Windows and android Tutorials.

In the previous post, you learned how to install Munin on Debian 10. That installation referred to the server-side. Note that Munin monitors especially remote machines. Now I will show you how to install the agent or client on an Ubuntu 20.04 machine so that the client is handled by the server. The procedure is quite simple and practical.

Install Munin Agent on Ubuntu 20.04

Before we start, you have to know that we are working on two servers. The first one is where we have the Munin server which contains Debian 10. The other one is the client.

Have at hand the IP addresses and hostname of each of them and open the port 4949 on both.

So, on the client, open a terminal session and update Ubuntu.

sudo apt update
sudo apt upgrade

After that, you need to install the munin-node package which is the package where the Munin client is embedded.

This package is available in the official Ubuntu repositories so the installation is not complex.

So, install the package by running:

sudo apt install munin-node

this way it will be installed.

Adding the Munin client to the server

On the client-side, we now have to configure the machine to communicate with the server.

To do this, edit the munin configuration file

sudo nano /etc/munin/munin-node.conf

And at the end of the file, add the following content:

host_name osradarclient
allow ^192.22.145.141$

Remember to change the hostname to the client’s hostname and the client’s IP address. Do not modify the symbols ^ or \ which are necessary.

Save the file and close it.

Apply the changes by restarting the munin-node service.

sudo systemctl restart munin-node.service

And check the status of the service:

sudo systemctl status munin-node.service

Working on the server

We are almost ready, but we have to adjust some things on the server.

On the server, open the munin configuration file.

sudo nano /etc/munin/munin.conf

And add the following information

[osradarclient]
    address 46.183.114.67
    use_node_name yes

Remember that you have to change the hostname and the IP address to the client’s one. This is done so that the program can monitor it.

Apply the changes by restarting the munin services.

sudo systemctl restart munin munin-node.service

Now we are ready.

Now open a web browser and access the Munin server and you should see the client node already added.

The post How to install the Munin agent on Ubuntu 20.04? appeared first on Linux Windows and android Tutorials.

What is Munin?

According to the Munin website:

Munin is a networked resource monitoring tool that can help analyze resource trends and “what just happened to kill our performance?” problems. It is designed to be very plug and play. A default installation provides a lot of graphs with almost no work.

Munin the monitoring tool surveys all your computers and remembers what it saw. It presents all the information in graphs through a web interface. Its emphasis is on plug and play capabilities. After completing a installation a high number of monitoring plugins will be playing with no more effort.

Using Munin you can easily monitor the performance of your computers, networks, SANs, applications, weather measurements and whatever comes to mind. It makes it easy to determine “what’s different today” when a performance problem crops up. It makes it easy to see how you’re doing capacity-wise on any resources.

So, let us get started.

Install Munin on DEbian 10

The first thing you have to do is to install some packages needed to run the Munin web client.

sudo apt update
sudo apt install apache2 apache2-utils libcgi-fast-perl libapache2-mod-fcgid

Then enable the Apache fcgid module:

sudo a2enmod fcgid

Now you can install munin and some additional packages such as those containing the plugins and for the node.

sudo apt install munin munin-node munin-plugins-extra

As Muni is accessible from the web, it is convenient to request a username and password to make sure that not just anyone can log in and see the information.

htpasswd -c /etc/munin/munin-htpasswd admin
New password:
Re-type new password:
Adding password for user admin

You can replace admin with the user of your choice.

Then, enable the default VirtualHost configuration for Munin:

sudo cp -p /etc/munin/apache24.conf /etc/apache2/sites-available/munin.conf

Enable the new VirtualHost:

sudo a2ensite munin
sudo systemctl reload apache2

Before using Munin, it is advisable to make some modifications to the virtualhost.

sudo nano /etc/apache2/sites-available/munin.conf

And leave the file as follows:

ScriptAlias /munin-cgi/munin-cgi-graph /usr/lib/munin/cgi/munin-cgi-graph
Alias /munin/static/ /var/cache/munin/www/static/

<Directory /var/cache/munin/www>
AuthUserFile /etc/munin/munin-htpasswd
Authtype Basic
AuthName "Munin"
Require valid-user
Options FollowSymLinks SymLinksIfOwnerMatch
Options None
</Directory>

   <Directory /usr/lib/munin/cgi>
    AuthUserFile /etc/munin/munin-htpasswd
    Authtype Basic
    AuthName "Munin"
    Require valid-user
    Options FollowSymLinks SymLinksIfOwnerMatch
    
   <IfModule mod_fcgid.c>
        SetHandler fcgid-script
    </IfModule>
    <IfModule !mod_fcgid.c>
        SetHandler cgi-script
    </IfModule>
</Directory>

Save the changes and close the editor.

And to apply the changes, restart Apache and munin.

sudo systemctl restart apache2 munin-node

Access to Munin interface

Now all you have to do is to verify that the server is working properly and to do this you just have to open a web browser and access http://your-server/munin and you will see the following

So, Munin is working but you need to add nodes.

The post Install Munin on Debian 10 appeared first on Linux Windows and android Tutorials.

A server administrator must be aware of the processes that take place on it, its performance as well as the behavior it has when performing the tasks for which it was installed; all this without sacrificing valuable computer resources, that is, maximum efficiency is required.

Linux-Dash is a great web-based monitoring tool that allows you to visualize the behavior of your server in real time, without sacrificing resources. The requirements for its execution are really few: PHP to be interpreted, Apache to be accessed from the web and git, if you want to clone your project from GitHub.

Installing Linux Dash on Ubuntu 20.04

Before installing Linux Dash, it is a good idea to perform a general system update. This increases the stability of the system, but also prepares the system for downloading packages.

:~$ sudo apt update
:~$ sudo apt upgrade

Now we can move on.

1.- Install some required packages

To install and run Linux Dash, some previous packages are required. These packages are in the official Ubuntu repositories, so installing them is not a big deal.

:~$ sudo apt install wget unzip git apache2 php7.4 php7.4-json libapache2-mod-php7.4
apache2-bin apache2-data apache2-utils libapr1 libaprutil1 libaprutil1-dbd-sqlite3 libaprutil1-ldap libjansson4 liblua5.2-0 php-common php7.4-cli php7.4-common
php7.4-opcache php7.4-readline ssl-cert
Suggested packages:
apache2-doc apache2-suexec-pristine | apache2-suexec-custom www-browser php-pear openssl-blacklist zip
The following NEW packages will be installed:
apache2 apache2-bin apache2-data apache2-utils libapache2-mod-php7.4 libapr1 libaprutil1 libaprutil1-dbd-sqlite3 libaprutil1-ldap libjansson4 liblua5.2-0 php-common
php7.4 php7.4-cli php7.4-common php7.4-json php7.4-opcache php7.4-readline ssl-cert unzip
0 upgraded, 20 newly installed, 0 to remove and 0 not upgraded.
Need to get 6048 kB of archives.
After this operation, 26.6 MB of additional disk space will be used.
Do you want to continue? [Y/n]

These packages include Apache and PHP which are the basis for running Linux Dash as it is a web-based application.

2.- Download and install Linux Dash on Ubuntu 20.04

The next step is to clone the Linux Dash repository. To do this we will use Git. This process guarantees that you have the latest stable version of the application.

:~$ git clone https://github.com/afaqurk/linux-dash.git
Cloning into 'linux-dash'…
remote: Enumerating objects: 3, done.
remote: Counting objects: 100% (3/3), done.
remote: Compressing objects: 100% (3/3), done.
remote: Total 4520 (delta 0), reused 0 (delta 0), pack-reused 4517
Receiving objects: 100% (4520/4520), 4.58 MiB | 20.00 KiB/s, done.
Resolving deltas: 100% (2670/2670), done.

In any case, the application is quite light and achieves the objective set in an efficient way. So updating this program will not take long.

When the cloning of the repository is finished, a folder called linux-dash will be generated. This folder has to be moved to the Apache root directory.

:~$ sudo mv linux-dash/ /var/www/html/

In order for Linux Dash to run smoothly and have access to system resources, it is necessary to change the owner of the folder to www-data which is Apache.

:~$ sudo chown -R www-data:www-data /var/www/html/linux-dash/

Now make sure that the PHP functions shell_exec and exec are enabled.

To do this, open the file /etc/php/7.4/apache2/php.ini

:~$ sudo nano /etc/php/7.4/apache2/php.ini

Press CTRL + W to enable searching the file. Type disable_functions and press ENTER. This will take you directly to the line:

disable_functions = pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wte
rms

If the shell_exec and exec modules are in that line, just delete them, save the changes and close the file.

In my case, they were not there so I just closed the file.

So, to apply any changes you may have made, just restart Apache.

:~$ sudo systemct restart apache2

Finally, now we can run Linux Dash.

3.- Using Linux Dash

Once Linux Dash is installed, we can run it through the web interface.

So, open a web browser and go to the following address http://[your-pc-ip-or-domain]/linux-dash

In my case, I accessed with the following address http://192.168.250/linux-dash

And there the main screen of Linux Dash will be displayed with information about the computer.

As you can see, it is very presented in blocks that make it fast and easy to understand.

Also, you can navigate through the tabs to show even more information. For example, this is what the Basic Info tab looks like.

Another interesting aspect is that you can get information about the network traffic that the computer has. Quite useful in many circumstances.

So, it is a basic tool but very useful and ideal for home servers or even some production servers where it is required.

Enjoy it.

Conclusion

In this post you have learned how to install Linux Dash on Ubuntu 20.04 as you have seen is a basic monitoring tool but very interesting. So, it’s ideal for test servers or even personal computers.

So, share this post and join our Telegram Channel.

Linux Dash Github Page

The post Basic system monitoring with Linux Dash on Ubuntu 20.04 appeared first on Linux Windows and android Tutorials.

Webmin is a web-based interface for managing UNIX systems. It has a new web interface where you can modify and manage several things on the computer. For example, user accounts, UNIX groups, DNS, and others.

In addition, you will have no license problems with Webmin because it is released under the GPL3 license, which guarantees that you can use it, modify it, and install it as you want.

So, let’s install Webmin on Ubuntu 20.04 / Debian 10.

Installing Webmin on Ubuntu 20.04 / Debian 10

Before starting the installation, it is necessary to update the system completely.

So open a terminal session and run the following:

:~$ sudo apt update
:~$ sudo apt upgrade

In case you do not have access to sudo on Debian 10, you can use our tutorial and enable it.

How to enable sudo on Debian 10?

At the end of the upgrade, the system will have security patches that increase the stability of the system.

So, Webmin provides a repository so that the application can be made using APT. This is the most recommended method to install Webmin on Ubuntu 20.04 and Debian 10.

First, install some necessary packages.

:~$ sudo apt install apt-transport-https gnupg

Then, edit your APT font list to add the Webmin repository.

:~$ sudo nano /etc/apt/sources.list

At the end of the file add this line.

:~$ deb https://download.webmin.com/download/repository sarge contrib

Then download and add the GPG key from the repository. This further secures the webmin download.

:~$ wget http://www.webmin.com/jcameron-key.asc
:~$ sudo apt-key add jcameron-key.asc

After that, refresh the APT source and install Webmin.

:~$ sudo apt install webmin

Webmin uses port 10000 to run. So make sure that port is available on the server.

Now you can acess using your web browser. Just go to https://your-server:10000.

Just type your system credentials. And you will see the dashboard.

Also, you can enable the Night mode.

So, you can now use it.

Conclusion

Webmin is one of those applications that can be easy to install but help to know the system information quickly and accurately. It has a special package for Ubuntu 20.04 and Debian 10 which makes it easier to install.

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The post How to install Webmin on Ubuntu 20.04 / Debian 10? appeared first on Linux Windows and android Tutorials.