Pipeing linux commands and their output

2009-12-08 199 words 1 min read

As a system administrator, I always worry about certain things, like who's doing what, what processes are running, what the network traffic looks like, etc.  One day I decided to create a simple alias that would combine all the commands I wanted into one big chunk of information.  Then I realized that it wouldn't all fit into one screen.
Fortunately I knew how to group all of the commands together, so the "more" command could handle them as one set of input.

First, here's the wrong way to try to page a sequence of four commands:

     date; netstat -i; whodo; ps -ef | more

The only command that gets paged properly here is the "ps -ef" command –the rest of them scroll off the screen before you can read them.

Here's the correct way to page four commands so they're all controlled by "more":

      (date; netstat -i; whodo; ps -ef) | more

Once you find the commands you want to group together, you can combine them into an alias or shell program.  I recommend a shell program for this, because a few "echo" statements sure make it easier to see where one command ends and the next command begins!

Tags: Linux


Authored By Amit Agarwal

Amit Agarwal, Linux and Photography are my hobbies.Creative Commons Attribution 4.0 International License.

We notice you're using an adblocker. If you like our webite please keep us running by whitelisting this site in your ad blocker. We’re serving quality, related ads only. Thank you!

I've whitelisted your website.

Not now
This website uses cookies to ensure you get the best experience on our website. Learn more Got it