One Day One GNU/Linux Command (SORT)

One Day One GNU/Linux Command
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sort - Sort lines of text files

Summary : 

Sort the file contents based on options given to it.
By default the output is showed in the console.

Examples :

$ sort  -- Take the input from stdin, sort and output 
           in stdout.

$ sort myfile -o myoutput -- Sort the myfile content 
                             and store in "myoutput"

$ sort -b myfile -- Ignore the leading blanks and sort.

$ sort -br myfile -- Same as above but in reverse order

$ sort -c myfile -- Only Check whether myfile is already 
                    sorted

$ sort -f myfile -- Ignore the case and sort (a == A)

$ sort -u myfile -- Sort and output only unique lines

$ sort -t : -k 2,2n -k 5.3,5.4 myfile