Update CentOS : Upgrade CentOS to latest version using yum command (CentOS7.0/7.1/7.2/7.3/7.4/7.5/7.6 to CentOS 7.7).

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Introduction
CentOS is a free, community-supported Linux distribution from community Enterprise Operating system compatible with its upstream source, Red Hat Enterprise Linux (RHEL)

Upgrade CentOS to latest version using yum update command is not so difficult task.
Also find the configure latest yum repository on CentOS and update CentOSpackages using yum update command without upgrading to minor release to upgrade packages without upgrading the CentOS latest version (CentOS7.0/7.1/7.2/7.3/7.4/7.5/7.6 to CentOS 7.7).
 
Upgrade CentOS to latest version using yum update command: 5 Easy Steps

Step 1: Check current version
# cat /etc/redhat-release
Step 2: Backup for the OS
Take a healthy backup for operating system to avoid operating system update level failure latter.

Step 3: Check for repository and cleanup
# cd /etc/yum.repos.d/
# ls
Here you can sea a list of repository which are availabel. Start a cleanup task to clean yum repository.
# yum clean all
Step 4: Update yum repository to get latest packages
# yum makecache fast
Step 5: Check for available updated packages
# yum check-update
It will list for updated packages available for your CentOS. Run below command to Update centos using yum update command.
 # yum update

Reboot the server
# reboot
Still if you are unable to find latest packaged then find configure latest yum repository on CentOS. and also fellow update CentOSpackages using yum update command without upgrading to minor release to upgrade packages without upgrading the CentOS latest version (CentOS7.0/7.1/7.2/7.3/7.4/7.5/7.6 to CentOS 7.7).

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