1. Ever tried creating pdf files in your unix machine ??
man -t ascii | ps2pds - > ascii_man_page.pdf
-t flag formats the output and ps2pds converts post script to pdf.
hyphen (-) after ps2pdf command indicates it to read input from stdin and write output to stdout.
2. Want to terminate the script after first failure ?
'set -e' thats it. it does everything.
$> cat setexit.sh
#/bin/bash
set...
Educating yourself does not mean that you were stupid in the first place; it means that you are intelligent enough to know that there is plenty left to 'learn'. -Melanie Joy
Monday, 18 November 2013
Friday, 1 November 2013
Programmable Completion : Autocomplete the arguments of your program
Auto completion is one of the best features in bash. How good if it completes argument for your program as well !!
The Bash complete and compgen builtins make it possible for tab completion to recognize partial parameters and options to commands. In a very simple case, we can use complete from the command-line to specify a short list of acceptable parameters.
with...
compgen - List All Unix Commands !!
compgen is bash built-in command and it will show all available commands, aliases, and functions.
and it is used to get the specific set of words from a word list ( ?? )
To list all the commands available :
$ compgen -c
alert
c
d
egrep
fgrep
..
..
..
bzexe
espdiff
sol
gnome-mines
gnome-sudoku
To list all the bash shell aliases available :
$ compgen -a
alert
c
d
egrep
fgrep
grep
l
la
To...