Debian/Ubuntu Tips and Tricks

Debuntu

Debian/Ubuntu Tips and Tricks

How-To: Automatically logout idle bash session

Posted by chantra on 15th July 2013

It can be useful to have a bash session automatically closing after some time. One of the obvious reason you might want this to happen is to make sure that no console is left with root access unwillingly.

Bash comes ready for this and can be configured to automatically terminate after waiting for activity for a given time.

Read the rest of this entry »

Tags: , ,
Posted in Administration, General, HowTo, System | No Comments »

How-To: Bash Parameter Expansion and String Manipulation

Posted by chantra on 19th February 2013

Last time we saw how bash can help us in handling default values out of the box using parameter expansion. This time we will see how basic string operations (nonetheless common and useful) can also be achieved using bash.

There is many ways to do string manipulation with bash, like finding a filename extension using expr, separating the directory part from a filename using dirname and basename.... or even more sophisticated ones based on regex, sed....

Why using a sledgehammer to crack a nut when you could use bash builtin functionalities!

Read the rest of this entry »

Tags: , , ,
Posted in Administration, HowTo, Softwares, System | No Comments »

How-To: Bash Parameter Expansion and Default Values

Posted by chantra on 28th January 2013

Bash is a sh-compatible command language interpreter that executes commands read from the standard input or from a file.
There is much more to bash than running a sequence of commands, one of the features bundled with bash is parameter expansion.

Any shell user has most likely used shell variables, be it $1 or $myvar, to save values... but there is more to it. This tutorial will cover a subset of shell parameter expansion that can become really handy and save you a lot of time.

Read the rest of this entry »

Tags: , , ,
Posted in Administration, HowTo, Softwares, System | No Comments »