Commands using export (100)

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Convert text to uppercase
Usage: upper [STRING]...

To create files with specific permission:

Number of .... indicate how far down to cd
Use dots to cd down directories instead of having to remember all of the pesky back slashes! Better yet, works on even and odd number of dots! Now, just estimate how far down you want to traverse.

commandline dictionary
Note: 1) Replace 'wonder' with any word you looking the meaning for in the above example 2) Need to install these packages: wordnet & wordnet-base (latter should be automatically installed because of dependency) 3) Combined size of packages is about 30MB on my old ubuntu system (I find it worth it)

Most used command

list any Linux files without users or groups
suspicious/anomalous ownership may indicate system breach; should return no results

gzip compression with progress bar and remaining time displayed

How to get an absolute value
Whenever we are only interested in difference between two numbers and not the positive/negative values we can use this in script.

Find C/C++ source code comments
This is a naive way of finding source code comments in source code files that use C-like comments: // and /*...*/

Lists installed kernels


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