Linux Classroom Series – 29/Jul/2020

Linux Repository Based Software Management

  • A linux repository is a storage location from which our system can install applications as well as Operating system updates.
  • Each repository is collection of software hosted on remote server so that it can be used my many systems for installing/updgrading softwares (packages)

YUM

  • yum is a popular packaging/updating tool for managing software on Linux systems. It is basically a wrapper program for RPM with enhancements.

  • Yum is pre installed on rhel family like centos, redhat, amazon linux

  • Recommendataion: Use cheatsheet Refer Here

  • Sample commands

    • yum install <package-name>: install the package
    • yum erase <package-name>: remove the specified package
    • yum search <package-pattern>: searches the lust of package names
    • yum deplist <package-name>: List all the libraries and moduels that the package depends on
    • yum check-update: Refreshes the local cache of yum database
    • yum reinstall <package-name>
    • yum update <package-name>
    • yum upgrade: Upgrades all packages install in your system to latest release
  • Yum configuration is located at /etc/yum.conf provides system-wide configuration options for yum.

  • In yum we can navigate to /etc/yum.repos.d Preview

  • If you want to add a repo create a file with .repo extensionin this folder and add the information

[REPO-NAME]
name=REPOSITORY-NAME
mirrorlist=<http-url>
#baseurl
gpgcheck=1
gpgkey

  • Case study:
    • Install OpenJDK 8 using yum (Linux has repository already added)
    sudo yum search jdk
    sudo yum info java-1.8.0-openjdk-devel
    sudo yum install java-1.8.0-openjdk-devel -y
    
    Preview
    • Install Logstash (Linux doesnt have a repository where the software is distributed)
      • Lets add information about a new repository to our redhat system. create a new file called as elastic.repo in /etc/yum.repos.d with following info
      [logstash-7.x]
      name=Elastic repository for 7.x packages
      baseurl=https://artifacts.elastic.co/packages/7.x/yum
      gpgcheck=1
      gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
      enabled=1
      autorefresh=1
      type=rpm-md
      
      Preview Preview

APT

  • APT is a tool for managing packages on ubuntu based systems

  • Refer Here for apt based cheat sheet

  • Lets install Java8 in ubuntu (repository already added) Preview Preview

  • Lets install logstash (repository not added) Refer Here

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