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What is Runuser command?
The runuser command is used to run a shell with specified user and group ID. This command changes the user and group id’s. So, only privileged user, i.e. root user can run this command successfully and can change to any user without any need for password. This command is quite useful when used in shell scripts.
What is parallel command in Ubuntu?
DESCRIPTION. GNU parallel is a shell tool for executing jobs in parallel using one or more computers. A job can be a single command or a small script that has to be run for each of the lines in the input. The typical input is a list of files, a list of hosts, a list of users, a list of URLs, or a list of tables.
How do you use Runuser?
The runuser command run a shell with substitute user and group IDs. This command is useful only when run as the root user: Only session PAM hooks are run, and there is no password prompt. If run as a non-root user without privilege to set user ID, the command will fail as the binary is not setuid.
How do I run a parallel command in Linux?
You have various options to run programs or commands in parallel on a Linux or Unix-like systems: => Use GNU/parallel or xargs command. => Use wait built-in command with &. => Use xargs command.
Where can I find the runuser command in Linux?
For bug reports, use the issue tracker at https://github.com/karelzak/util-linux/issues . The runuser command is part of the util-linux package which can be downloaded from Linux Kernel Archive < https://www.kernel.org/pub/linux/utils/util-linux/ >. This page is part of the util-linux (a random collection of Linux utilities) project.
What do I need to know about runuser?
For backward compatibility, runuser defaults to not changing the current directory and to setting only the environment variables HOME and SHELL (plus USER and LOGNAME if the target user is not root). This version of runuser uses PAM for session management.
What’s the difference between runuser and Su shell?
If the option -u is not given, runuser falls back to su -compatible semantics and a shell is executed. The difference between the commands runuser and su is that runuser does not ask for a password (because it may be executed by the root user only) and it uses a different PAM configuration.
How to run shell with specified user ID?
The runuser command is used to run a shell with specified user and group ID. This command changes the user and group id’s. When you want to run some commands as some other user, this command can be used to change the user.