17 Feb 2007 Using at
(Set XMMS to play wakeup.ogg at 6am tomorrow morning)
%
at 6am tomorrow at> xmms ~/music/wakeup.ogg at>
job 6 at 2003-10-31 06:00
(At 11:30 pm today, start an install of mozilla)
%
at 11:30 pm today at> emerge update mozilla at>
job 7 at 2003-10-30 23:30
Now there are two jobs scheduled which will be run ‘at’ the specified times. To view a list of jobs you’ve scheduled, use atq. If you decide you don’t want a job to run, you can can use the atrm command.
Removing a previously scheduled job
(Remove the ‘emerge’ job we scheduled for 11:30pm)
%
atq
6 2003-10-31 06:00 a david
7 2003-10-30 23:30 a david
% atrm 7
% atq
6 2003-10-31 06:00 a david
Tags: at
Posted by Hans-Henry Jakobsen
17 Feb 2007 Listing files by date, ISO style
ls -lgot --time-style=long-iso
Tags: date
Posted by Hans-Henry Jakobsen
17 Feb 2007 Using nl to number lines
(basic use)
% nl filename
(Include empty lines)
% nl -ba filename
(Left justified number column)
% nl -nln filename
Tags: nl
Posted by Hans-Henry Jakobsen
17 Feb 2007 Convert everything in the current directory from upper- to lowercase.
A bash script to convert everything from upper- to lowercase.
"!/bin/bash
for n in *; do mv $n `echo $n | tr '[:upper:]' '[:lower:]'`; done
Posted by Hans-Henry Jakobsen
09 Feb 2007 someprog > /dev/null 2>&1
The first part, “> /dev/null” means send standard output to the ‘bit bucket” or in other words, throw it away.
The second part, “2>&1” means “redirect standard error (2) to the same place as standard outout (1.)
Tags: redirect, stderr, stdout
Posted by Hans-Henry Jakobsen
