The restricted shell is a Unix shell that restricts some of the capabilities available to an interactive user session, or to a shell script, running within it. It is intended to provide an additional layer of security, but is insufficient to allow execution of entirely untrusted software.

What is Rbash in Linux?

What is rbash? The Restricted Shell is a Linux Shell that restrict some of the features of bash shell, and is very clear from the name. The restriction is well implemented for the command as well as script running in restricted shell. It provides an additional layer for security to bash shell in Linux.

How do I restrict permissions in Linux?

Limit User’s Access To The Linux System Using Restricted Shell. First, create a symlink called rbash from Bash as shown below. The following commands should be run as root user. Next, create an user called “ostechnix” with rbash as his/her default login shell.