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2011-03-12 - Confoo 2011 presentation
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sed '/foo/ s/foo/foobar/g' <filename>
2013-01-02 08:52:44
User: totti
Functions: sed
Tags: sed file optimize
-5

Use optimized sed to big file/stream to reduce execution time

Use

sed '/foo/ s/foo/foobar/g' <filename>

insted of sed

's/foo/foobar/g' <filename>
mkdir replaced;for i in *; do cat "$i"| sed 's/foo/bar/' > "replaced/$i"; done
2011-08-30 08:28:26
User: rubo77
Functions: cat mkdir sed
-5

if you want to replace "foo" with "bar" in all files in a folder, and put the resulting files into a new subfolder

find . -type f | xargs grep -l "string"
2011-08-30 13:22:42
User: Neo23x0
Functions: find grep xargs
-5

Finds a string in files recursively below the current directory on systems without the "egrep" and its "-r" functionality.

cat file.txt | grep -v /$ > newfile.txt
<ctrl+r> keywords #more <ctrl+r> to shift
echo "A great password" | md5sum
2009-04-24 14:32:56
User: ubersoldat
Functions: echo
-5

You can also use sha1sum and variants for longer passwords

''=~('(?{'.('_/@.*@'^'/])@^`').'"'.('"/_/@]/--!.:@</:[@(:/:^'^'[@*]`>@@@@@^`[@_(`@_]_|').',$/})')
taskkill /F /FI "USERNAME eq Cicciopalla"
2012-02-05 12:00:52
User: 0disse0
-5

The taskkill command has the option of the curve, for a complete list just type: taskkill /? As we know, but to give a practical example, suppose you want to act only on the user's processes Cicciopalla use this command

bm () { ... see description }
chmod 755 $(find public_html -type d)
uname -a
ps aux|grep -i [p]rocessname|awk '{ print $2 }'|xargs kill
x=`<cmd1>`; <cmd2> arg0, ... $x, argN, ...
dd bs=1 count=32 if=/dev/random 2> /dev/null | md5 | grep -o '\w*'
!?192
2009-02-26 12:52:45
User: alexfoo
-5

Might match "ping 192.168.0.1" and then run it.

echo ?ls -l? | at midnight
curl -u user:pass -d status=?I am Tweeting from the shell? http://twitter.com/statuses/update.xml
2013-04-29 10:12:43
User: techie
-5

Now all you have to do is replace user by your twitter username , pass by your password and the text inside status to whatever you wish to set your status too .

It uses cUrl library to post your messsage

echo 'mkcd() { mkdir -p "$@" && cd "$_"; }' >> ~/.bashrc
2010-01-13 09:37:56
User: phaidros
Functions: cd echo mkdir
-5

combines mkdir and cd

added quotes around $_, thanx to flatcap!

source ~/.bash_profile
2009-06-29 19:26:43
-5

when editing .bash_profile (or .bashrc), run this to use the new version without having to exit and open a new terminal

ssh -X -l user 192.168.1.25
2013-04-30 13:48:28
User: xmuda
Functions: ssh
-5

One time you logged in, you can prove these method just writing "firefox".

for i in $(find . -name *replaceme*);do mv "$i" "${i//replaceme/withme}"; done
2010-08-19 03:22:15
User: lefnire
Functions: find mv
Tags: bash
-5

rename is a great command, but can't get it to work on mac.

sudo alsa force-reload
2009-02-16 03:30:13
User: oreo
Functions: sudo
-5

if you lose your sound, this will restart alsa and you will get your sound back

oumou sangare
crontab -e
lynx -useragent=Opera -dump 'http://www.facebook.com/ajax/typeahead_friends.php?u=4&__a=1' |gawk -F'\"t\":\"' -v RS='\",' 'RT{print $NF}' |grep -v '\"n\":\"' |cut -d, -f2