Display the output of a command from the first line until the first instance of a regular expression.

2010-01-04 0 min read Bash Linux

$\"Screenshot$: Image via Wikipedia

| perl -n -e 'print "$_" if 1 … /«a class="zem_slink freebase/en/regular_expression" title="Regular expression" rel="wikipedia" href="http://en.wikipedia.org/wiki/Regular_expression">regex>/;# This <a class="zem_slink freebase/en/command_line_interface" title="Command-line interface" rel="wikipedia" href="http://en.wikipedia.org/wiki/Command-line_interface">command line will display the output of , from the first line of output, until the first time it sees a <a class="zem_slink freebase/en/pattern_matching" title="Pattern matching" rel="wikipedia" href="http://en.wikipedia.org/wiki/Pattern_matching">pattern matching .

Know when you will type :q in your term instead of vi(m), the alias will chewed you out.

2009-12-20 1 min read Bash Vim Tips

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.
alias :q=’tput setaf 1; echo >&2 ”this is NOT vi(m) :/”; tput sgr0’

Display a block of text with delineated by a start pattern and an end pattern

2009-12-18 1 min read Bash

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 | head -`fgrep -n -m 1 “$2” $3 }
Display a block of text with delineated by a start pattern and an end pattern

View the newest xkcd comic.

2009-12-07 1 min read Bash Linux

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.

$ xkcd(){ local f=$(curl -s <a href="http://xkcd.com/">http://xkcd.com/);display $(echo "$f"|grep -Po '(?<=")http://imgs.xkcd.com/comics/[^"]+(png|jpg)');echo "$f"|awk '/<img src="http://imgs.xkcd.com/comics/.?" title=./{gsub(/^.title=.|".?$/,"");print}';}

To get a random xkcd comic, I also use the following:

xkcdrandom(){ local f=$(wget -q <a href="http://dynamic.xkcd.com/comic/random/">http://dynamic.xkcd.com/comic/random/ -O -);display $(echo "$f"|grep -Po '(?<=")http://imgs.xkcd.com/comics/[^"]+(png|jpg)');echo "$f"|awk '/<img src="http://imgs.xkcd.com/comics/.?" title=./{gsub(/^.title=.|".?$/,"");print}';}

Insert a comment on command line for reminder

2009-12-05 1 min read Bash Linux

<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 used directly on the command line so I can save in the history a brief description of what command does.

* View this command to comment, vote or add to favourites * View all commands by vgagliardi

commandlinefu.com

by David Winterbottom (codeinthehole.com)

URL: <a href="http://feedproxy.google.com/~r/Command-line-fu/~3/_5hXsFUuAwc/insert-a-comment-on-command-line-for-reminder">http://feedproxy.google.com/~r/Command-line-fu/~3/_5hXsFUuAwc/insert-a-comment-on-command-line-for-reminder

bash colors

2009-11-16 0 min read Bash

$\"People$: Image via Wikipedia

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 here is the one liner for you all:

Get your external IP address

2009-11-04 1 min read Bash Linux

$ echo -e "GET /automation/n09230945.asp HTTP/1.0rnHost: whatismyip.comrn" | nc whatismyip.com 80 | tail -n1

<a href="http://www.commandlinefu.com/commands/view/3962/get-your-external-ip-address">View this command to comment, vote or add to favourites
<a href="http://feeds2.feedburner.com/commands/by/Marko">View all commands by <a href="http://feeds2.feedburner.com/commands/by/Marko">Marko

by David Winterbottom (<a href="http://codeinthehole.com">codeinthehole.com)

URL: <a href="http://feedproxy.google.com/~r/Command-line-fu/~3/7xln2n56mnk/get-your-external-ip-address">http://feedproxy.google.com/~r/Command-line-fu/~3/7xln2n56mnk/get-your-external-ip-address<h6 class="zemanta-related-title" style="font-size: 1em;">Related articles by Zemanta <ul class="zemanta-article-ul"> <li class="zemanta-article-ul-li"><a href="http://www.computer-realm.net/how-find-computers-ip/">How to Find Out Your Computer’s IP (computer-realm.net) <div class="zemanta-pixie" style="margin-top: 10px; height: 15px;"><a class="zemanta-pixie-a" title="Reblog this post [with Zemanta]" href="http://reblog.zemanta.com/zemified/42c8d78f-7105-47fc-9f21-6df9065a21a3/"><img class="zemanta-pixie-img" style="border: medium none; float: right;" src="http://blog.amit-agarwal.co.in/wp-content/uploads/2010/08/reblog_e29.png" alt="Reblog this post [with Zemanta]" /><span class="zem-script more-related pretty-attribution">