Determine whether a full CentOS 7 reboot is required and which services need to be restarted.
Increase the system-wide number of available file handles (open files).
Automatically clear GNU Bourne-Again SHell history when you exit a login shell.
Inspect parent processes to determine whether shell script or specific process has been executed locally, remotely, or by any other application.
Determine whether the standard input file descriptor refers to a terminal which can be useful to ensure that the shell script is executed using an interactive terminal.
Reboot Linux operating system during recovery when shell is executed instead of standard init process.
Limit bandwidth on specific network interface using
Query and change the system hostname.
Upgrade Ubuntu 18 LTS to the latest Ubuntu 20 LTS (Long Term Support) release.
Change the number of reserved filesystem blocks.