RedHat/Centos Patching Process

 Patching is a process to make an OS up to date so that there should not be any security or vulnerability concern to server where production-grade application are running.

Step 1:- Yum should be updated to date with respect to all packages.

             yum update -y

Step 2:- Check the security issues with yum and update the yum security.

              yum check-update --security 

              yum update --security

Step 3: Only signed rpm packages should be installed.

           rpmkeys --checksig <<rpm package file>>

           yum install <<rpm package file>>

Step 4:- Check the shared libraries impact

           lsof <<library name>>