Explain yum in linux

YUM (Yellowdog Update Modified): yum is the primary tool for installing, deleting, querying, and managing Linux RPM(Redhat Package Manager)software packages from official software repositories (base) as well as other third-party repositories.

Yum Help command

# yum help

How to configure Local Yum repository

Mount ISO on mnt(or other) diretory

mount -o loop isoname.iso /mnt

If you use DVD media use below command

# mount -o loop /dev/sr0  /mnt

If you are configuring on Virtual machine

# mount /dev/cdrom /mnt

Or,

# mount -t iso9660 /dev/cdrom /mnt

Now create a repo file in yum direcoty

#cp /etc/media.repo /etc/yum.repos.d/localrepo.repo

Edit repo file /etc/yum.repos.d/localrepo.repo

[localrepo]

name=CentOS

baseurl="file:///location"

gpgcheck=0

How to clear yum cache data

#yum clean all

Install a package using yum

# yum install firefox

Or,

# yum install firefox –y

How to Uninstall/Remove a package

#yum remove firefox

How to Update package

#yum update vsftpd

Note: update option will allow you to upgrade your old package version to new.

How to check available Update package information

#yum updateinfo packagename

# yum updateinfo bind

How to list specific package

# yum list vsftpd

How to list all installed package

#yum list installed

How to list all installed and available package

# yum list all

How to know the information/Version/ Release/ Size about package

# yum info vsftpd

  

How to check dependency of a package

#yum deplist nfs-utils

Or,

#yum deplist vsftpd

How to know what package a file belongs to

#yum whatprovides filename

Example:

#yum whatprovides /etc/named.conf

Or,

# yum whatprovides  /etc/passwd

How to know what package a command belongs to

#yum whatprovides *bin/commandname

Example:

#yum whatprovides *bin/nslookup

Install all the default packages by group

#yum groupinstall "Development Tools"

Update all the default packages by group

#yum groupupdate "Development Tools"

Remove all packages in a group

# yum groupremove "Development Tools"

Show enabled repository

#yum repolist

How to downgrade a package to an earlier version

#yum downgrade packagename

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About Penguin Technology

I am a passionate cloud and DevOps professional specializing in Linux and open-source solutions. Through this blog, I share my knowledge and experience with the community, offering tips and insights on cloud technologies and DevOps practices.