Step 1: Update the system

First of all update your system by running the given command.

sudo apt -y update && sudo apt -y upgrade

Step 2: Install Node.js 13 on Ubuntu / Debian / Linux Mint

You can install node.js 13 after updating the system and then installing the required repository.

curl -sL https://deb.nodesource.com/setup_13.x | sudo bash -

After creating directory, you can move forward to Install Node.js 13 on Ubuntu / Debian / Linux Mint.

sudo apt-get install -y nodejs

You can check your installed version by following this command.

node -V

For Installing Development tools, run the following command as a root or with sudo privileges.

sudo apt-get install gcc g++ make

For yarn package Installation follow the below step

curl -sL https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -

echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

sudo apt-get update && sudo apt-get install yarn

The post How To Install latest node.js 13 on Ubuntu 19.04 / Debian / Linux appeared first on Linux Windows and android Tutorials.

What is Docker Compose?

Docker Compose is a tool that provides us the facility to define and run multi-container Docker application. A YAML file is the configuration file used to configure your application’s services.
So, we are going to Install Docker Compose in as much details as possible so you can easily understand and Install it. For this Installation we’ll check Github API releases page for our project. After it we’ll pull out the latest binary file for our Installation process. So, follow the below steps to move further.

Step 1: Installing Latest Docker Compose on Linux

Requirements:

You must have installed Curl on your system for this operation.
Access to the root or user with root privileges.

---- CentOS / RHEL -----
 $ sudo yum -y install curl
 ---- Debian / Ubuntu ----
 $ sudo apt install -y curl 
 ----- Fedora -----
 $ sudo dnf -y install curl 

After Installing curl move to the next point which is Downloading the latest Compose on your Linux Machine.

curl -s https://api.github.com/repos/docker/compose/releases/latest \
   | grep browser_download_url \
   | grep docker-compose-Linux-x86_64 \
   | cut -d '"' -f 4 \
   | wget -qi -

Make sure to make binary file executable.

chmod +x docker-compose-Linux-x86_64

Now, move the file to your PATH.

sudo mv docker-compose-Linux-x86_64 /usr/local/bin/docker-compose

Check the version you’ve installed.

docker-compose version

Step 2: Configure Compose Command-line completion.

Compose has command completion for the bash & zsh shell.

Bash users.

Place the completion script in /etc/bash_completion.d/

sudo curl -L https://raw.githubusercontent.com/docker/compose/master/contrib/completion/bash/docker-compose -o /etc/bash_completion.d/docker-compose

Source the file or re-login to enjoy completion features.

source /etc/bash_completion.d/docker-compose

Zsh users

Download the completion script in your ~/.zsh/completion/

mkdir -p ~/.zsh/completion

curl -L https://raw.githubusercontent.com/docker/compose/master/contrib/completion/zsh/_docker-compose > ~/.zsh/completion/_docker-compose

Include the directory in your $fpath by adding in ~/.zshrc

fpath=(~/.zsh/completion $fpath)

Double check that compinit is loaded or load it by adding in ~/.zshrc.

autoload -Uz compinit && compinit -i

After-it reload your shell.

exec $SHELL -l

Step 3: Test Docker Compose Installation

Make a file for testing docker compose.

vim docker-compose.yml

Copy & paste the below data in the file.

version: '3'  

services:

  web:

    image: nginx:latest

    ports:

     - "8080:80"

    links:

     - php

  php:

    image: php:7-fpm

Start the containers services.

$ docker-compose up -d
Starting root_php_1 … done
Starting root_web_1 … done

Output:

Show running Containers

$ docker-compose ps
    Name                 Command              State          Ports        
 root_php_1   docker-php-entrypoint php-fpm   Up      9000/tcp            
 root_web_1   nginx -g daemon off;            Up      0.0.0.0:8080->80/tcp

Destroy Containers.

 $ docker-compose stop
 Stopping root_web_1 … done
 Stopping root_php_1 … done 

$ docker-compose rm -f
 Going to remove root_web_1, root_php_1
 Removing root_web_1 … done
 Removing root_php_1 … done

For detailed description or learning more about Docker documentation & Docker Compose documentation visit their official page .

The post How To Install Latest Docker Compose on Ubuntu 19.04 / CentOS 8 / Debian 10 / Fedora 30 appeared first on Linux Windows and android Tutorials.

In this tutorial, we are going to learn how to sync & store CentOS 8 BaseOS & AppStream repositories on Foreman Katello & Red Hat Satellite. Foreman is used for life cycle management of physical and virtual systems. It is an open source application use for provisioning.

Foreman is the basic foundation form which Red Hat Satellite’s core functionality is derived. Katello is a Foreman plug-in for subscription & repository management. It helps you to assist with storing repositories on your local system and provides a means to subscribe to those repositories & download content.

In case, you don’t have Foreman/Red Hat Satellite, you can follow this tutorial;

How To Create CentOS 8 Local Repository Mirrors With Rsync & Nginx

Now, move towards our tutorial,

Step 1: Creating a Product

Create a product on CLI or from the web console.

From CLI:

List organizations

hammer organization list

Create Product

hammer product create --organization-id 1 \

From Web Console

Go to Products> Create Product

Type your product details & click the save button to finish creating your product.

Step 2: Import CentOS 8 GPG Key

From CLI

mkdir /etc/pki/rpm-gpg/import/
 cd /etc/pki/rpm-gpg/import/
 wget https://www.centos.org/keys/RPM-GPG-KEY-CentOS-Official
 hammer gpg create --organization-id 1 \
   --key "RPM-GPG-KEY-CentOS-Official" \
   --name "RPM-GPG-KEY-CentOS-8"

Navigate to Content > Credential > New Content Credential to create key from Web Console.

Provide all information like -Name, Type & Paste the key content or use the below button to upload.

Step 3: Create Repositories

Now you can add the new repositories to the newly created product.

Hammer CLI

BaseOS repository

 hammer repository create 
--organization-id 1 \   
--product "CentOS 8 Linux for x86_64" \   
--name "CentOS 8 Base RPMS" \   --label "CentOS_8_Base_RPMS" \   
--content-type "yum" \   --download-policy "on_demand" \   
--gpg-key "RPM-GPG-KEY-CentOS-8" \   --url "http://centos.mirror.liquidtelecom.com/8/BaseOS/x86_64/os/" \   
--mirror-on-sync "no" 

AppStream repository

hammer repository create --organization-id 1 \
   --product "CentOS 8 Linux for x86_64" \
   --name "CentOS 8 AppStream RPMS" \
   --label "CentOS_8_AppStream_RPMS" \
   --content-type "yum" \
   --download-policy "on_demand" \
   --gpg-key "RPM-GPG-KEY-CentOS-8" \
   --url "http://centos.mirror.liquidtelecom.com/8/AppStream/x86_64/os/" \
   --mirror-on-sync "no"

PowerTools repository

hammer repository create --organization-id 1 \

  --product "CentOS 8 Linux for x86_64" \

  --name "CentOS 8 PowerTools RPMS" \

  --label "CentOS_8_PowerTools_RPMS" \

  --content-type "yum" \

  --download-policy "on_demand" \

  --gpg-key "RPM-GPG-KEY-CentOS-8" \

  --url "http://centos.mirror.liquidtelecom.com/8/PowerTools/x86_64/os/" \

  --mirror-on-sync "no"

Centosplus repository

hammer repository create --organization-id 1 \
   --product "CentOS 8 Linux for x86_64" \
   --name "CentOS 8 centosplus RPMS" \
   --label "CentOS_8_centosplus_RPMS" \
   --content-type "yum" \
   --download-policy "on_demand" \
   --gpg-key "RPM-GPG-KEY-CentOS-8" \
   --url "http://centos.mirror.liquidtelecom.com/8/centosplus/x86_64/os/" \
   --mirror-on-sync "no"

Extras repository

hammer repository create --organization-id 1 \

  --product "CentOS 8 Linux for x86_64" \

  --name "CentOS 8 extras RPMS" \

  --label "CentOS_8_extras_RPMS" \

  --content-type "yum" \

  --download-policy "on_demand" \

  --gpg-key "RPM-GPG-KEY-CentOS-8" \

  --url "http://centos.mirror.liquidtelecom.com/8/extras/x86_64/os/" \

  --mirror-on-sync "no"

Run the following command to list & view the repositories in the Product.

hammer repository list 
--organization-id 1 
--product "CentOS Linux for x86_64"

 $ hammer repository list --organization-id 1 --product "CentOS 8 Linux for x86_64" 
---|--------------------------|---------------------------|--------------|--------------------------------------------------------------- 
ID | NAME                     | PRODUCT                   | CONTENT TYPE | URL 
---|--------------------------|---------------------------|--------------|--------------------------------------------------------------- 
65 | CentOS 8 AppStream RPMS  | CentOS 8 Linux for x86_64 | yum          | http://centos.mirror.liquidtelecom.com/8/AppStream/x86_64/os/ 
64 | CentOS 8 Base RPMS       | CentOS 8 Linux for x86_64 | yum          | http://centos.mirror.liquidtelecom.com/8/BaseOS/x86_64/os/ 
67 | CentOS 8 centosplus RPMS | CentOS 8 Linux for x86_64 | yum          | http://centos.mirror.liquidtelecom.com/8/centosplus/x86_64/os/ 
68 | CentOS 8 extras RPMS     | CentOS 8 Linux for x86_64 | yum          | http://centos.mirror.liquidtelecom.com/8/extras/x86_64/os/ 
66 | CentOS 8 PowerTools RPMS | CentOS 8 Linux for x86_64 | yum          | http://centos.mirror.liquidtelecom.com/8/PowerTools/x86_64/os/ 
---|--------------------------|---------------------------|--------------|--------------------------------------------------------------- 

From Web Console

We can achieve the same from the Foreman / Satellite web dashboard.

To achieve this go to Products > Repositories.

Step 4: Sync Repositories

Now you are able to Sync your repositories to your local Satellite / Katello server.

From CLI

list repositories

 $ hammer repository list --organization-id 1 --product "CentOS 8 Linux for x86_64" 
---|--------------------------|---------------------------|--------------|--------------------------------------------------------------- ID | NAME                     | PRODUCT                   | CONTENT TYPE | URL 
---|--------------------------|---------------------------|--------------|--------------------------------------------------------------- 
65 | CentOS 8 AppStream RPMS  | CentOS 8 Linux for x86_64 | yum          | http://centos.mirror.liquidtelecom.com/8/AppStream/x86_64/os/ 
64 | CentOS 8 Base RPMS       | CentOS 8 Linux for x86_64 | yum          | http://centos.mirror.liquidtelecom.com/8/BaseOS/x86_64/os/ 
67 | CentOS 8 centosplus RPMS | CentOS 8 Linux for x86_64 | yum          | http://centos.mirror.liquidtelecom.com/8/centosplus/x86_64/os/ 
68 | CentOS 8 extras RPMS     | CentOS 8 Linux for x86_64 | yum          | http://centos.mirror.liquidtelecom.com/8/extras/x86_64/os/ 
66 | CentOS 8 PowerTools RPMS | CentOS 8 Linux for x86_64 | yum          | http://centos.mirror.liquidtelecom.com/8/PowerTools/x86_64/os/
 ---|--------------------------|---------------------------|--------------|--------------------------------------------------------------- 

Look over th IDs then loop through to sync the repositories.

for i in $(seq 64 68); do \

  hammer repository synchronize --async --organization-id 1 \

  --product "CentOS 8 Linux for x86_64" \

  --id "$i"; \

  done

Make sure status is working properly.

 $ hammer product list  --name "CentOS 8 Linux for x86_64" --organization-id 1 
---|---------------------------|----------------------------------------|---------------|--------------|------------------ ID | NAME                      | DESCRIPTION                            | ORGANIZATION  | REPOSITORIES | SYNC STATE 
---|---------------------------|----------------------------------------|---------------|--------------|------------------ 
37 | CentOS 8 Linux for x86_64 | Repositories for CentOS 8 Linux x86_64 | Mycompany LTD | 5            | Syncing Complete. 
---|---------------------------|----------------------------------------|---------------|--------------|------------------ 

You can also run a sync from web console dashboard.

Step 5: Create a Content View

Follow this command to create content view

 hammer content-view create --organization-id 1 \
--name "CentOS_8" \   
--description "Content view for CentOS 8" 

Add repositories to Content View

for i in $(seq 64 68); do \   
hammer content-view add-repository --organization-id 1 \   
--name "CentOS_8" \   
--product "CentOS 8 Linux for x86_64" \   
--repository-id "$i"; \   
done 

Step 7: Publish Content View

 hammer content-view publish --organization-id 1 \   
--name "CentOS_8" \   
--description "Publishing repositories" 

Create an Activation Key

 $ hammer lifecycle-environment list --organization-id 1 
---|---------|------ 
ID | NAME    | PRIOR 
---|---------|------ 
1  | Library | 
---|---------|------ 

$ hammer activation-key create --organization-id 1 \
   --name "centos8" \
   --description "CentOS 8 Activation Key" \
   --lifecycle-environment "Library" \
   --content-view "CentOS_8" \
   --unlimited-hosts
 $ hammer activation-key list --organization-id 1
 ---|-----------------|------------------|-----------------------|--------------------------
  ID | NAME            | HOST LIMIT       | LIFECYCLE ENVIRONMENT | CONTENT VIEW              ---|-----------------|------------------|-----------------------|-------------------------- 
1  | centos7         | 0 of Unlimited   |                       |                           2  | centos8         | 0 of Unlimited   |                       |                           ---|-----------------|------------------|-----------------------|-------------------------- 

Step 9: Add Subscription to Activation Key

hammer subscription list --organization-id 1

 hammer activation-key add-subscription --organization-id 1 \   
--name "centos8" \   
--quantity "1" \   
--subscription-id "164" 

Where 164 is the id of the subscription shown by the last command.

Step 10: Subscribe CentOS 8 Machine to Satellite / Foreman (Katello)

Our repositories are now ready to be consumed by CentOS clients.

Follow this guide to learn;

How To Subscribe CentOS Server to Katello/Foreman

Congratulations! You’ve all done. If have any queries regarding this tutorial guide, feel free to ask.

The post How To Sync CentOS 8 repositories on Satellite / Katello / Foreman appeared first on Linux Windows and android Tutorials.

Step 1: Install iscsi-initiator-utils on CentOS / RHEL 8.

sudo dnf -y install iscsi-initiator-utils

Step 2: Configure Initiator Name

Edit the file /etc/iscsi/initiatorname.iscsi/ and name it to match the target server name you’ve used.

sudo vi /etc/iscsi/initiatorname.iscsi

InitiatorName=iqn.2019-11.com.osradar:initiator01

Step 3: Configure Credentials

Open the following file to set up credential details.

sudo vi /etc/iscsi/iscsid.conf

Note: Use the credentials as you’ve done in setting up target so they match.

Uncomment "node.session.auth.authmethod=CHAP"
Uncomment "node.session.auth.username" and set username as "Initiator01"
Uncomment "node.session.auth.password" and set it as you've setup in previous setup.

Step 4: Testing iSCSI Target discovery

Run the following command to confirm that iSCSI can discover our installed iSCSI Target.

iscsiadm -m discovery -t sendtargets -p 172.17.52.184

Note: Use your iSCSI target server IP.

If the IP info and access details is displayed we can say the discovery is successful.

Step 5: Confirm Target’s status

Run the given command to check the status.

iscsiadm -m node -o show

# BEGIN RECORD 6.2.0.874-10  node.name = iqn.2019-11.osradar.com:target01  node.tpgt = 1  node.startup = automatic  node.leading_login = No  iface.hwaddress =   iface.ipaddress =   iface.iscsi_ifacename = default  iface.net_ifacename =   iface.gateway =   iface.subnet_mask =   iface.transport_name = tcp  iface.initiatorname =   iface.state =   iface.vlan_id = 0  iface.vlan_priority = 0  iface.vlan_state =   iface.iface_num = 0  iface.mtu = 0  

Step 6: Access iSCSI Target on CentOS / RHEL 8

Login to your account by typing this command , you will see a success message at the end.

iscsiadm -m node --login

Logging in to iface: default, target: iqn.2019-11.osradar.com:target01, portal: 172.17.255.109,3260 Login to [iface: default, target: , portal: 172.17.255.109,3260] 
 iqn.2019-11.osradar.com:target01 successful.

Make sure you’re logged into your iSCSI Target Server.

iscsiadm -m session -o show

tcp: [1] 172.17.255.109:3260,1 iqn.2019-11.osradar.com:target01 (non-flash)

Check disks if you’ve added Target’s disk

We’ve created backstore of 5GB space in our previous tutorial.

lsb1k

Format & mount the new disk to make it ready for use.

In this tutorial we’ll use fdisk to set up LVM type. You are free to use your desired one.

fdisk /dev/sdb

Confirm the new partition number.

lsb1k

Look at the new partition , we have sdb1 as seen below. Now, add a file system on the new partition.

 NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT  fd0               2:0    1    4K  0 disk  sda               8:0    0   20G  0 disk  ├─sda1            8:1    0  953M  0 part /boot  └─sda2            8:2    0 19.1G  0 part    ├─centos-root 253:0    0    6G  0 lvm  /    ├─centos-swap 253:1    0  956M  0 lvm  [SWAP]    ├─centos-home 253:2    0  7.5G  0 lvm  /home    └─centos-var  253:3    0  4.7G  0 lvm  /var  sdb               8:16   0    5G  0 disk  └─sdb1            8:17   0    5G  0 part ##sdb1 Added  sr0              11:0    1 1024M  0 rom 

Set file system on the partition

Here, we’ll use xfs. You can use any (ext3,ext4,Btrfs etc) to fit your case.

mkfs.xfs /dev/sdb1

Mount your partition and confirm

mount /dev/sdb1/mnt

df -TH

Congratulations! You’ve all done. If have any queries regarding this tutorial, you can ask in comments.

The post How To Configure iSCSI Initiator on CentOS / RHEL 8. appeared first on Linux Windows and android Tutorials.

What is ArangoDB?

ArangoDB is a native multi-model, open-source database with flexible data models for documents, graphs, and key-values. Build high-performance applications using a convenient SQL-like query language or JavaScript extensions. Use ACID transactions if you require them. Scale horizontally and vertically with a few mouse clicks.

On the other hand, to offer graph functionalities, they make use of _from and _to attributes that allow connecting the information. This, in conjunction with edge indexes, allows the processing of graph queries with a great performance.

Let’s install it on Debian 9

In its website download section ArangoDb has two versions: an Enterprise version dedicated to companies and large projects; and another community version that is ideal for small projects or to learn. In this tutorial, I will use the last one.

I’ll use the command line interface and a user with sudo privileges, so let’s get started. Open a terminal and run:

:~$ sudo -i

After entering your password, you will be the root user.

Now you must add the repository so that ArangoDB packages can be installed via APT. Run:

:~# curl -OL https://download.arangodb.com/arangodb33/Debian_9.0/Release.key

Note: If you don’t have curl installed, you’ll need to do it with apt install curl.

After that, you must run:

:~# apt-key add - < Release.key

Next:

:~# echo 'deb https://download.arangodb.com/arangodb33/Debian_9.0/ /' | sudo tee /etc/apt/sources.list.d/arangodb.list

Now, you must install a necessary package and then refresh the repositories.

:~# apt install apt-transport-https
:~# apt update

And finally, proceed to install ArangoDB:

:~# apt install arangodb3=3.3.14

At the end of the installation, you must define the administrator password of the ArangoDB instance.

After entering the password, you will have to repeat it and then you will be asked if you want the program to update automatically.

On the next screen, you will be asked about the storage engine. Choose the auto option.

Finally, it will ask you if you want to make a backup of your database every time the package is updated.

And finally, the installation will continue automatically.

Verifying the installation

At this point in the tutorial, the installation went smoothly, however, to make sure everything is working, run:

:~# systemctl status arangodb3.service

You should get a message similar to the one shown in the image. The service is running and active.

The ArangoDB package comes with the following programs:

• arangod: The ArangoDB database daemon.
• arangosh: The ArangoDB shell.
• arangoimp: A bulk importer for the ArangoDB server.
• arangodump: A tool to create backups of an ArangoDB database in JSON format.
• arangorestore: A tool to load data of a backup back into an ArangoDB database.
• arango-dfdb: A datafile debugger for ArangoDB
• arangobench: A benchmark and test tool.

In addition, there is also a beautiful web interface to manage our data in a friendly way. You can access from the browser, with the IP address of the server and port 8529.

Log in. The user is root and the password is the one you defined during the installation.

Next, you will select which database to access.

Once you have logged in, you will see the main panel, with a lot of information about your instance.

And that’s it. Finally, I recommend you consult their official documentation, where you can expand this and other knowledge.

ArangoDB is a program that is having a lot of recent success due to its easy handling and robustness, in addition to its flexibility which makes it ideal for complex tasks.

Tell us your experience in the comments.

Please share this article through social networks.

The post How to install ArangoDB on Debian 9? appeared first on Linux Windows and android Tutorials.