Portainer is a lightweight management graphical user interface which allows you to easily manage your Docker host or Swarm cluster. Portainer is meant to be as simple to deploy as it is to use. It consists of a single container that can run on any Docker engine. It’s a powerful, open-source management toolset that allows you to easily build, manage and maintain Docker environments

In this guide you will learn that how to install docker and manage it with portainer.

Install Docker on CentOS 8 / RHEL 8

Step 1 Enable Docker CE Repository

Currently docker packages are not available on CentOS and RHEL 8 repositories, so run following dnf command to enable Docker CE repository.

dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo

Step 2 Install Docker CE using dnf command

Now, use below dnf command to install latest version of docker.

dnf install docker-ce --nobest -y

Step 3 Start Docker Service

After the installation, start and enable docker service using the following systemctl commands

systemctl start docker
systemctl enable docker
systemctl status docker

Step 4 Verify and Test Docker CE Engine

To verify that docker ce engine has been setup correctly, run below docker command,

docker run hello-world

Docker has been installed successfully and running fine, now we will install and configure portainer so that we can manage docker from web interface.

Install Portainer on CentOS 8 / RHEL 8 for Docker Management

Step 1 Download Portainer Image

Download the Portainer image from the DockerHub using the docker pull command below.

docker pull portainer/portainer

Step 2 Run Portainer

Run the Portainer container with the following command:

docker run -d -p 9000:9000 --name your_portainer_name --restart always -v /var/run/docker.sock:/var/run/docker.sock -v /opt/portainer:/data portainer/portainer

Step 3 Verify Portainer is Running

After installing the Portainer container, run the docker ps command to verify the status of the container:

docker ps

Step 4 Access Portainer Web Interface

Now, open your browser, access the Portainer web interface with your server’s IP or FQDN with port 9000

YOUR-SERVER-IP:9000

In my case it is 192.168.231.130:9000

Note: If you are facing any issue or unable to browse the link just use below commands

firewall-cmd --permanent --zone=trusted --change-interface=docker0
firewall-cmd --permanent --zone=trusted --add-port=4243/tcp
firewall-cmd --reload

Next we need to set admin username and password to access portainer. Then, click on “Create User” button to create your administrator user.

Step 5 Configure Portainer

We will configure Portainer to “manage the local Docker environment” select Local Docker environment and click on the Connect button

Finally, you will be redirected to the Portainer dashboard, select the “local docker”

Here you can see all info and a summary about your containers, images, networks, volumes and Templates.

Finally everything has been done and now you can create, manage and remove your docker containers from portainer graphical interface.

Portainer Dashboard:

After logging in portainer you will be redirected to the Portainer home screen, select the “local docker” then go to the “Dashboard” here you will see running stacks, containers, images, volumes and networks.

Stacks:

Click on the stacks option and it will provide status of all created stacks.

Container:

This list will provide details of all running and stopped container. This output is very similar to docker ps command option.

Images:

Clicking on this option will provide the host of container images that are available. It will show all the container images.

Networks:

It is used for network operations. Like assigning IP address, creating sub-nets, providing IP address range and user access control.

Create a Container Using Portainer GUI

There are many other features you can explore by yourself. Now we will create a docker container. we will create Apache container.

Under Add Templates option, Click on “Httpd” template

Now set the Name for container, leave network as it is, then configure its ports and click on “Deploy the container” button.

Now you can verify the status of created container from “Containers” option. you can see in image below that container named “my-apache-server” is running

Test Apache is running fine. open your browser and browse your SERVER-IP-ADDRESS

That’s it in this article, I hope this will be very helpful.

The post Install Docker and Manage it with Portainer on CENTOS 8 / RHEL 8 appeared first on Linux Windows and android Tutorials.

Install Speedtest-CLI on CentOS 8 and RHEL 8 and Fedora

This tool is written in python so we must install python before proceeding. so run below command and install python.

dnf install -y python36

Create soft link for python3

ln -s /usr/bin/python3.6 /usr/bin/python

Downoad speedtest_cli using below commands

cd

wget -O speedtest-cli https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py

Make the script executable

chmod +x speedtest-cli

Finally run below command to test internet bandwidth

./speedtest-cli

Install Speedtest-CLI on Ubuntu

sudo apt-get install speedtest-cli

speedtest-cli

That’s it. Now you learned that how to install speedtest-cli command line interface for testing internet bandwidth using speedtest.net on a CentOS/RHEL/Fedora/Ubuntu Linux.

The post How to Test Internet Speed in Linux appeared first on Linux Windows and android Tutorials.

There are many options can be used in nslookup command however we will use some of them in this article.

command syntax

nslookup [option]

nslookup google.com

nslookup -type=a google.com

nslookup with domain name or -type=a will display the A Record (IP Address) of the domain. here google.com is a domain name. Use these commands to find the IP address or A record for a domain.

nslookup 8.8.8.8

If you want to see reverse DNS lookup use IP address with nslookup command

nslookup -type=any google.com

Above command will display all available DNS records of domain google.com

nslookup -type=ns google.com

You can use -type=ns with nslookup command to get Name Servers of the domain.

nslookup -type=mx google.com

MX stands for Mail Exchanger which is email server, run above command to see mail server of a domain.

nslookup -type=txt google.com

TXT records can be used for many purposes like SPF, DKIM, DMARC records etc if you want to see all of them use option -type=txt with nslookup command.

The post How to use nslookup in Linux appeared first on Linux Windows and android Tutorials.

Features

Administrative features:

• Web-based graphical user interface with optional SSL encryption
• Localized into over 20 languages
• Web, console, and SSH access configurable
• Plug-ins
• Wide range of configurable alerts and alerting mechanisms, including log emails and reporting notification
• Downloadable configuration file and encryption keys
• S.M.A.R.T. disk diagnostics
• Local certificate management, including Certificate Authority role.
• 2 factor authentication, LDAP, Active Directory, RADIUS, IPSec, Kerberos and other authentication/user management systems supported in FreeBSD and therefore available for FreeNAS (Note: some but not all supported in GUI).

File system features:

• Highly resilient ZFS file system with Feature Flags (OpenZFS v5000) and theoretical storage limit of 16 Exabytes. ZFS file system features are fully configurable and include:
• Compression (including lz4 and gzip),
• Full-volume encryption (Disk encryption with GELI and AESNI hardware acceleration),
• Snapshots (which can be near-continual; snapshotting every 15-30 minutes is not uncommon),
• Data deduplication
• User quotas
• Physical disks are fully portable and can be moved without data loss to other FreeNAS servers, or to any other Operating System that supports a compatible version of OpenZFS.
• Data reliability features – mirroring / RAID (including ZFS RaidZ), multiple copies of selected data and metadata for reliability, and entire-system checksumming and background data repair as needed (“scrubbing”) (see also: ZFS generally, which was designed expressly with the aim of ensuring data preservation)
• Server reliability features –
• Replication, fallover and failover,
• Multi-version boot environment – the boot menu provides access to previous versions of FreeNAS which have been upgraded. In the event of a boot issue or system problem, FreeNAS can also load any of these at boot, as “known good” versions, without “rolling back” the server.
• Disk read and data import for UFS2, NTFS, FAT32 and EXT2/3
• User/Group permissions – Classic Unix/Linux permissions and/or ACL based (including ACLs for Microsoft file systems)

Built-in network services and features:

• Protocols as standard – Samba/SMB/CIFS (for Microsoft and other networks), AFP (Apple), NFS, iSCSI, FTP/TFTP
• LDAP and Active Directory client support with Windows ACLs
• Apple Time Machine and Microsoft File History/Previous Versions support
• rsync data sync and replication (server/client)
• Link aggregation and failover
• VLAN networking
• Dynamic DNS client
• Remote syslogd forwarding
• SNMP monitoring
• Wide range of networking hardware and environments supported by FreeBSD, including copper cable, fiberoptic cable, WiFi
• Supports jumbo frames, hardware offloading (exact features offloaded vary by adapter), high bandwidth servicing (10G+)

FreeNAS Uses:

• SMB and Enterprise file serving
• Virtualization server storage backing
• Media center audio/video serving and streaming to DLNA devices

Requirements:
8 GB of Disk Space is the absolute minimum. 16 GiB is recommended.
64-bit hardware is required forFreeNAS releases.
8 GB of RAM is required, with more recommended.

Step 1

Download FreeNAS from this link. Burn ISO image to DVD or make a Bootable usb.
https://www.freenas.org/download-freenas-release/

turn on your system, plugin bootable media (DVD or USB) and start installation process

Step 2

Navigate to Option 1 Boot FreeNAS Installer and press ENTER key to install FreeNAS

Step 3

Here Select Install/Upgrade option and Hit ENTER on Ok button

Step 4

Now Choose One or Multiple Drives where you want to install FreeNAS, Spacebar button is used to select drive and asterisk(*) will notify that the drive is selected, then hit ENTER on Ok button.

Step 5

At this time you will get a warning that everything will be removed from selected drives, just proceed to installation by clicking on Yes button.

Step 6

Setting up your root password

Step 7

Finally you will receive a message that installation succeeded. hit on ok

Step 8

Remove your bootable installation media (USB or DVD), navigate to option “Reboot System” and restart it

Step 9

After rebooting the system you will get similar screen given below, here you need to copy the URL so that you can access FreeNAS GUI from your webs browser.

In my case it is http://192.168.231.130

Step 10

Open the web browser and enter the URL to Access FreeNAS GUI, then type your login details user name will be “root” and the password is you set during installation.

Finally you will see FreeNAS Dashboard like below.

That’s it you have installed and configured FreeNAS successfully, soon we will create a guide that how to create a file sharing server on FreeNAS.

The post How to Install and Configure FreeNAS appeared first on Linux Windows and android Tutorials.

The primary configuration file for logrotate is /etc/logrotate.conf and it has the default settings. So, if you want additional application-specific configuration then you have to create a separate file for that application in /etc/logrotate.d directory.

In this article you will learn that how to configure logrotate in Linux

Step 1: Install logrotate on Linux

Install logrotate on Ubuntu and Debian

apt install logrotate 

Install logrotate on CentOS, RHEL and Fedora

yum install  -y logrotate

OR

dnf install  -y logrotate

Step 2: Configure logrotate

We will configure logrotate for Apache web server in CentOS server. Let’s say we want to rotate the logs of a service “apache” that is creating logfiles under /var/log/httpd directory. So we will create a file “apache” under /etc/logrotate.d directory and make appropriate configuration in this file to rorate all the logs of apache service.

Run following command and add below lines in that file.

vi /etc/logrotate.d/apache

/var/log/httpd/* {
     daily
     rotate 50
     size 2M
     compress
     delaycompress
 }

/var/log/httpd It means rotating all logs from httpd directory.
daily means rotate the logs on a daily basis. you can also use weekly or monthly.
rotate 50 It means last 50 rotated logs should be kept.
size=2M means log will not be rotated until it reaches 2MB. sets the minimum size for the logs rotation.
compress It compress the old log files to save disk space.
delaycompress so it means rotated logs with the exception of the most recent one should be compressed.

now save changes to file and exit

You can also set many other options, for details run following command.

man logrotate

By default, logrotate automatically configures a cron job scheduled to run daily. but we want also run our desired log rotation file, Tells logrotate to force the rotation.

logrotate -f /etc/logrotate.d/httpd

Now run below command to see that what will logrotate do reading /etc/logrotate.d/httpd file.

logrotate -d /etc/logrotate.d/httpd

That’s it, so you can use logrotate and configure it for your desired service logs like it do for Apache web server.

The post How to Install and Configure logrotate on Linux appeared first on Linux Windows and android Tutorials.

In this article you will learn that how to use tar command for data archive and its compression using (tar, tar.gz, tar.bz2).

We will use below tar tools.

1- Tar
2- Gzip
3- Bzip2

Create tar Archive File

So, in below example we will create a tar archive file data.tar for a directory /boot in current working directory.

tar -cvf data.tar /boot

ls

c – Creates a new .tar archive file.
v – Verbosely show the .tar file progress.
f – File name type of the archive file.

Untar (Un-Compress) Archive File

Now, we will un-compress data.tar archive file in current working directory using below command.

tar -xf data.tar

x to extract archive file.

So what if you want to Un-compress archive in different path or directory. use -C (Capital C) in command and specify your path to un-compress it, Please see below example command.

tar -xf data.tar -C /media
ls /media

You can see in above image that boot directory is uncompressed in /media directory.

Create tar.gz (gzip) Archive File

If you want to compress a file/folder with gzip, then you have to use “z” in tar command and make archive extension as .tar.gz

z – To create a compressed gzip archive file

Run below command

tar -czf data.tar.gz /boot

Un-compress gzip archive file

tar -xf data.tar.gz

Then, you can also un-compress gzip file in your desired directory

tar -xf data.tar.gz -C /media

Create tar.bz2 Archive File

The bz2 feature is used to highly compress and create archive. Its archive size is small then gzip archive. The bz2 compression takes more time to compress and decompress files as compared to gzip which takes less time.

j – To create highly compressed tar file, Use following command

tar cj data.tar.bz2 /boot

Un-compress bz2 archive file

tar -xf data.tar.bz2

Now, un-compress it in another directory

tar -xf data.tar.bz2 -C /media

List Content of Archive File

t – it is used to list archive data without extract it.

tar -tvf data.tar
tar -tvf data.tar.gz
tar -tvf data.tar.bz2

That’s it.

The post Use tar command to archive/compress files/folders in Linux appeared first on Linux Windows and android Tutorials.

Jenkins It is a server-based system that runs in servlet containers such as Apache Tomcat. Jenkins supports version control tools, including AccuRev, CVS, Subversion, Git, Mercurial, Perforce, TD/OMS, ClearCase, and RTC, and can execute Apache Ant, Apache Maven, and sbt based projects as well as arbitrary shell scripts and Windows batch commands.

This provides hundreds of plugins to support building, deploying and automating any project under MIT license.

Just login as root user and follow below steps.

Step 1- Upgrade System

The very first step should update your system so everything will upto date and you will get secure.

dnf update -y

Step 2- Install JAVA

As I mentioned earlier Jenkins is build in JAVA, so we have to install JAVA on the server so we can use jenkins properly.

dnf install -y  java-1.8.0-openjdk

Now verify java version

java -version

Step 3: Adding Jenkins Repository

Now, we will add Jenkins Repository in Centos 7 / RHEL 8 so we can install it as Jenkins did not come with CentOS default repository.

First, install wget package is no installed already

dnf install -y wget

Then, download and enable Jenkins Repository

wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo

Now, import Jenkins GPG Key

rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key

Step 4- Install Jenkins on your CentOS 8 / RHEL 8 system

dnf install -y jenkins

Step 5- Start and Enable Jenkins Service

Now you have to start jenkins service so we can use it and enable it on boot so if system will reboot jenkins will start automatically

systemctl start jenkins
systemctl enable jenkins
systemctl status jenkins 

Step 6- Configure Firewall

You know Jenkins is works on port 8080 so we need to allow connection on that port by adding it in firewall.

firewall-cmd --zone=public --permanent  --add-port=8080/tcp
firewall-cmd --reload

Step 7- Setting Up Jenkins

Finally, everything is working fine as jenkins is installed successfully, now we you need to open your web browser and access jenkins using below URL:

YOUR-SERVER-IP:8080

You will see below page asking for Admin password to Unlock jenkins, when you browse the URL first time.

A path is also display on the page in which the password is saved, so go to your Linux terminal and issue following command to get the password.

cat /var/lib/jenkins/secrets/initialAdminPassword

Now, copy the password and paste it into the “Administrator password” box and click Continue.

So you will be asked if you want to install the suggested plugins or install additional plugins. I choose “install the suggested plugins” option you can choose your desired and the installation process will start immediately.

Note: If you are facing any issue during plugins installation, Click on “Select plugins to install” option then un-select all plugins. You can install desired plugins from jenkins dashboard also.

Now, create an admin account which will be used to manage the Jenkins server.

Then, you need to set Jenkins URL, set a URL or leave it as default and click on Save and Finish button.

Finally, everything has been done, click on “Start using Jenkins” button

and you will redirect to the Jenkins dashboard.

That’s it.

Jenkins allows you to deploy and automate important tasks for application development in an enterprise environment. However, it requires some previous knowledge of Linux.

The post How to install jenkins on CentOS 8 / RHEL 8 appeared first on Linux Windows and android Tutorials.

The disk stores the information about the partition locations and sizes in an area known as the partition table that the operating system reads before any other part of the disk. Each partition then appears to the operating system as a distinct “logical” disk that uses part of the actual disk. System administrators use different programs to create, resize, delete, and manipulate the partitions.

In this article we will use fdisk program to create partition. Partitioning allows the use of different filesystems to be installed for different kinds of files. Separating user data from system data can prevent the system partition from becoming full and rendering the system unusable. Partitioning can also make backing up easier.

List/view all Disk Partitions in CentOS 8.

fdisk   -l  

In linux all hard disks names show as sda, sdb, sdc etc.

sda means hard disk 1
sdb means hard disk 2
sdc means hard disk 3 and so on..

Hard Disk Partitions names:

Sda> sda1, sda2 etc

sda1 mean partitions 1 of sda(Hard disk 1)
So, sda2 mean partitions 2 of sda(Hard disk 1)

To Check File System Disk Space Usage and mount point of partitions.

df -h    

We will create and configure partition in four steps.

1- Create partition
2- Partprobe
3- Format Partition (Filesystem)
4- Mount Partition

Then we will also see that how to unmount and delete a created partition.

Manage partitions in CentOS 8. Step 1- Create partition

a- Run fdisk command to see disks and their partitions.

In fdisk -l command you have seen that a hard drive /dev/sdb has no partitions, so we will create a new partition on it.

 fdisk –l  

b- Choose desired hard disk

fdisk    /dev/sdb

c- Press m for help.
d- Press p to print partition table.
e- Press n to create new partition.
f- Press p to make primary partition.
g- Press 1 is created first partition on selected disk.
There are 1-4 partition number. We can type any one number from them.
h- Press enter to leave first cylinder as default.
i- Now assign space to partition. Use + to assign space e.g.
+1024M and press enter.
j- Press p to print partition table.

k- Press w to write/save partition.

Step 2- Partprobe

We have created partition but Linux kernel/Operating system did not know that a new partition has been added. To inform operating system about partition table changes. We can do two things. We will use second method it is recommended.

Restart machine (It is not recommended)
Run partprobe command (Recommended)

The partprobe command is used to inform the operating system of partition table changes without restarting the machine.

Note: Always run partprobe command after partition creation.

partprobe
fdisk -l  

Step 3- Format Partition (Filesystem)

We can set file system on partition in two different commands. We can use any of the following.

First Command

mkfs    -t  ext4   /dev/sdb1

mkfs make filesystem
-t to set filesystem type
ext4 It is a filesystem
/dev/sdb1 partition name

OR

Now, second Command

mkfs.ext4  /dev/sdb1

When we press Tab after mkfs we will see all file systems.

Manage partititions on CentOS. Step 4- Mount Partition

First create a mount point (a directory) /disk1 and use mount command to mount /dev/sdb1

a- Make a directory where we mount partition.

mkdir /disk1

b- Now mount partition on created directory.

mount  /dev/sdb1   /disk1

c- See mounted partitions

df –h

d- Mount partition permanently so it can also mount after system reboot.

The configuration file /etc/fstab contains the necessary information to automate the process of mounting partitions. In simple words /etc/fstab file is used to auto mount partitions.

syntax to add partition in /etc/fstab file:

Add partition in /etc/fstab to mount it permanent so if system will reboot partition will not unmount. Run following command.

vi /etc/fstab

then add below lines in in this file.

/dev/sdb1            /disk1      ext4            defaults        0     0

Save and quite.

Above two zero means filesystem will not run repair command on boot time on that partition.

Unmount a partition

If you want to unmount a partition use following command, where /dev/sdb1 will be replaced with your parition.

umount    /dev/sdb1

Mount all partitions. It will read /etc/fstab file and mount all partitions which are configured in that file.

mount    -a

Delete a partition:

df –h

a- Unmount partition. If we does not un-mount, partition will not delete.

umount    /dev/sdb1

b- Choose disk/drive.

fdisk    /dev/sdb

c- Press p to print partitions.
d- Press d to delete partition.
e- Now select partition number, we want to delete. E.g 1 is sdb1
Press 1 and enter
f- Press w to write/save changes.
g- Now run partprobe command.

partprobe

That’s it, You have briefly learned how to create, mount and set filesystems on a partition. We have also mounted, unmount created a partition and also check how to delete it. So, you know how to manage partitions in CentOS 8.

Also, you can read our posts about CentOS 8 in this link.

Please share this post and join our Telegram channel.

The post How to Manage partitions in CentOS 8 / RHEL 8 appeared first on Linux Windows and android Tutorials.

1- Install EPEL Release if CentOS or RHEL

dnf install -y epel-release

2- Install Linux Monitoring Sensors

Install lm sensor on RHEL 8 and CentOS 8 and Fedora

dnf install -y lm_sensors

Install lm sensor on RHEL 7 and CentOS 7

yum install -y lm_sensors

If you are using Debian or Ubuntu use following command

sudo apt-get install lm-sensors

3- Sensor Configuration

Now, we need to make some configuration using below command after lm sensor installation. So if you want to go with default configuration simply hit enter key step by step.

sensors-detect

You will see similar steps during configuration.

[root@osradar ~]# sensors-detect
 sensors-detect revision 3.4.0-8 (2016-06-01)
 System: Hewlett-Packard HP Compaq dc7900 Small Form Factor
 Board: Hewlett-Packard 3031h
 Kernel: 3.10.0-957.27.2.el7.x86_64 x86_64
 Processor: Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz (6/23/10)
 This program will help you determine which kernel modules you need
 to load to use lm_sensors most effectively. It is generally safe
 and recommended to accept the default answers to all questions,
 unless you know what you're doing.
 Some south bridges, CPUs or memory controllers contain embedded sensors.
 Do you want to scan for them? This is totally safe. (YES/no):
 Silicon Integrated Systems SIS5595…                       No
 VIA VT82C686 Integrated Sensors…                          No
 VIA VT8231 Integrated Sensors…                            No
 AMD K8 thermal sensors…                                   No
 AMD Family 10h thermal sensors…                           No
 AMD Family 11h thermal sensors…                           No
 AMD Family 12h and 14h thermal sensors…                   No
 AMD Family 15h thermal sensors…                           No
 AMD Family 16h thermal sensors…                           No
 AMD Family 17h thermal sensors…                           No
 AMD Family 15h power sensors…                             No
 AMD Family 16h power sensors…                             No
 Intel digital thermal sensor…                             Success!

     (driver `coretemp')
 Intel AMB FB-DIMM thermal sensor…                         No
 Intel 5500/5520/X58 thermal sensor…                       No
 VIA C7 thermal sensor…                                    No
 VIA Nano thermal sensor…                                  No
 Some Super I/O chips contain embedded sensors. We have to write to
 standard I/O ports to probe them. This is usually safe.
 Do you want to scan for Super I/O sensors? (YES/no):
 Probing for Super-I/O at 0x2e/0x2f
 Trying family National Semiconductor/ITE'...               Yes Found unknown chip with ID 0x1911 Probing for Super-I/O at 0x4e/0x4f Trying familyNational Semiconductor/ITE'…               No
 Trying family `SMSC'…                                     Yes
 Found unknown chip with ID 0x0b00
 Some systems (mainly servers) implement IPMI, a set of common interfaces
 through which system health data may be retrieved, amongst other things.
 We first try to get the information from SMBIOS. If we don't find it
 there, we have to read from arbitrary I/O ports to probe for such
 interfaces. This is normally safe. Do you want to scan for IPMI
 interfaces? (YES/no):
 Probing for IPMI BMC KCS' at 0xca0...                      No Probing forIPMI BMC SMIC' at 0xca8…                     No
 Some hardware monitoring chips are accessible through the ISA I/O ports.
 We have to write to arbitrary I/O ports to probe them. This is usually
 safe though. Yes, you do have ISA I/O ports even if you do not have any
 ISA slots! Do you want to scan the ISA I/O ports? (YES/no):
 Probing for National Semiconductor LM78' at 0x290...       No Probing forNational Semiconductor LM79' at 0x290…       No
 Probing for Winbond W83781D' at 0x290...                   No Probing forWinbond W83782D' at 0x290…                   No
 Lastly, we can probe the I2C/SMBus adapters for connected hardware
 monitoring devices. This is the most risky part, and while it works
 reasonably well on most systems, it has been reported to cause trouble
 on some systems.

 Do you want to probe the I2C/SMBus adapters now? (YES/no):
 Sorry, no supported PCI bus adapters found.
 Module i2c-dev loaded successfully.
 Next adapter: i915 gmbus ssc (i2c-0)
 Do you want to scan it? (yes/NO/selectively):
 Next adapter: i915 gmbus vga (i2c-1)
 Do you want to scan it? (yes/NO/selectively):
 Next adapter: i915 gmbus panel (i2c-2)
 Do you want to scan it? (yes/NO/selectively):
 Next adapter: i915 gmbus dpc (i2c-3)
 Do you want to scan it? (yes/NO/selectively):
 Next adapter: i915 gmbus dpb (i2c-4)
 Do you want to scan it? (yes/NO/selectively):
 Next adapter: i915 gmbus dpd (i2c-5)
 Do you want to scan it? (yes/NO/selectively):
 Now follows a summary of the probes I have just done.

 Just press ENTER to continue:
 Driver `coretemp':
 Chip `Intel digital thermal sensor' (confidence: 9) 
 Do you want to overwrite /etc/sysconfig/lm_sensors? (YES/no):
 Unloading i2c-dev… OK
 [root@osradar ~]#

So, you will see similar screen upon successful configuration.

4- See CPU Temperature

Finally issue following command to see CPU temperature,

sensors

So, you can see in above image the command “sensors” is showing number of CPU cores its current temperature. But in brackets its is also showing high and critical temperatures in degree centigrade.

See temperature on Runtime

watch sensors

Check temperature in Fahrenheit

Then, what if you wanna see it in Fahrenheit, if you want to do so simply run below command.

sensors -f

That’s it.

The post Check your CPU Temperature in Linux appeared first on Linux Windows and android Tutorials.

Check Directory Disk Usage Summary

So, below command is used to get the summary of disk usage of /boot directory. Its also unclude sub-directory summary.

du /boot

If you want to see a grand total disk usage of a directory, use below command where / should be your desired directory name.

du -s /boot

Check disk usage in human readable form

Now we will see disk usage of /boot directory in human readable from with grand total.

du -hs /boot

Check Disk Usage of Directories with files.

what if you wanna see that how much space is using by both, files and folders. to check that simply run below command

du -ah /boot

See Disk usage with Time

If you want to see total usage of a directory with it last modification time and date, then run following command

du -h --time /boot

Show disk space usage in KB

Simply run below command to see disk usage of a directory in kilobytes

du -k /boot

List space Usage in MB

du -mh /boot

Read manual pages using command “man du” for more information.

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