bash
grep -v with multiple patterns.
2010/01/25
$ sed '/test/{/error|critical|warning/d}' somefile If you wanted to do all in one command, you could go w/ sed instead […] <a href="http://www.commandlinefu.com"><img …
Seders\’s grab bag – Tutorials
2010/01/24
<a href="http://sed.sourceforge.net/grabbag/tutorials/">http://sed.sourceforge.net/grabbag/tutorials/ […] <a …
change the terminal title dynamically in X11
2010/01/09
I was actually looking for this for quite sometime. Some years back in my bashrc was the proper setting for setting the terminal title when I did a cd, and I had completely forgotten how to do it. So …
shell — one liner to selectively change case
2010/01/07
Today I had a hard time, I had a herculian task of converting the case of file to upper case. Well that’s not difficult :), I know. What made it difficult was the fact that not the whole …
Display the output of a command from the first line until the first instance of a regular expression.
2010/01/04
| perl -n -e 'print "$_" if 1 … /«a class="zem_slink freebase/en/regular_expression" title="Regular expression" rel="wikipedia" …
Know when you will type :q in your term instead of vi(m), the alias will chewed you out.
2009/12/20
most simple solution is to alias :q like so: alias :q=`echo ”This is not vim”` but as someone suggested in commandlinefu, you can use tput to put some color and fun into this. …
Display a block of text with delineated by a start pattern and an end pattern
2009/12/18
Taken idea from commandlinefu.com The command will display a segment from the file from the start pattern to the end pattern. function viewsegment() { tail -n +`fgrep -n -m 1 “$1” $3 | …
View the newest xkcd comic.
2009/12/07
This function displays the latest comic from xkcd.com. One of the best things about xkcd is the title text when you hover over the comic, so this function also displays that after you close the comic. …
Insert a comment on command line for reminder
2009/12/05
<a href="http://blog.amit-agarwal.co.in/category/linux/">Bookmark this category Insert a comment on command line for reminder […] $ ls -alh #mycomment […] Comments can be …
bash colors
2009/11/16
For those of the terminal freaks, color is a bliss. But have you tried all the colors in the terminal. Today someone forwarded me a bash one liner for the same. Not sure where he got this from, anyway …
Get your external IP address
2009/11/04
$ echo -e "GET /automation/n09230945.asp HTTP/1.0rnHost: whatismyip.comrn" | nc whatismyip.com 80 | tail -n1 […] <a href="http://www.commandlinefu.com"><img …
Stop long commands wrapping around and over-writing itself in the Bash shell
2009/10/12
Stop long commands wrapping around and over-writing itself in the Bash shell […] shopt -s checkwinsize […] add the command either in /etc/profile or ~/.bash_profile so that this is …