Linux – sebthom.de

Bash: Capturing stderr in a variable while still printing to the console.

Posted on Montag, der 31. Januar 2011Samstag, der 3. September 2011 by sebthom

Storing the stdout output of a command in a variable and displaying it is simple: OUTPUT=$(command) echo $OUTPUT If you have longer running commands where you want to display stdout in realtime and also store it in a variable you can tee the output to stderr: OUTPUT=$(command | tee /dev/stderr) OUTPUT=$(command | tee /proc/self/fd/2) OUTPUT=$(command…

Installing Tomcat 6 on Debian Squeeze

Posted on Samstag, der 13. März 2010Dienstag, der 18. Dezember 2012 by sebthom

This post describes how to setup Tomcat 6 on Debian Squeeze. The configured Tomcat serves requests on port 80 without the need of an additional web server. This is especially good for virtual servers (VPS) providing limit memory. It also has multiple virtual hosts configured, each with it’s own webapp with context root / and…

Determine the user who logged on via SSH

Posted on Montag, der 23. Februar 2009Dienstag, der 24. Februar 2009 by sebthom

Today we had the need to determine the initial id of a user who logged onto a Linux box via SSH and executed the su command. When the su command is issued the effective user is changed and whoami or id commands will report that new user id instead. For anyone who is interested, that…