su – Substitute User If one user needs to login as another user in the same CLI(shell) eg: su -l user-name Note: Root user can login as any of the other user without needing the password of the other users Normal user can login as any of the other user with password In some cases
In Order to install or Update software in RHEL we need to connect to RHN (RedHat Network). By creating Local Repository we can install software from our own device. It saves things like bandwidth and time. All we need is an iso image (CD/DVD image). Download the iso file from redhat.com and place it in /iso directory To
SSH is a networking protocol used for accessing the CLI(shell) remotely with applications. In RHEL7, ssh will be by default running as a daemon service called sshd in port 22. In this blog i want to show you how to secure the ports of SSH by changing it.