If you administer multiple Linux servers, Jack Wallen has an easy script you can use to run commands on all of those servers at once.

How to Run a Command on Startup in Linux. One of Linux's strengths as an operating system is its ability to be configured and tweaked to suit your tastes. Using the command line allows you to ...

The eval command allows you to run the contents of variables as commands and can be very useful -- especially in scripts.

To run commands simultaneously or in parallel, use the ampersand (&). However, keep in mind that using an ampersand sends the process to the background, allowing the next command to start immediately.

The steps described above are manifest in the following six commands: $ mkdir scripts $ cd scripts $ touch script.sh $ echo 'echo hello-world' >> script.sh $ chmod -R 777 . $ ./script.sh hello-world ...