All commands (14,184)
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kpartx can be found inside of the multipath-tools package -a adds the mappings and -d deletes them Show Sample Output
1kpartx -a /dev/mapper/space-foobar -
I prefer to use this and not the -n variety, so I get DNS-resolved hostnames. Nice when I'm trying to figure out who's got that port open.
13lsof -i -
It bypasses encryption overhead of SSH and depending on configuration can be significantly faster. It's recommended to use only in trusted networks.
9On target: "nc -l 4000 | tar xvf -" On source: "tar -cf - . | nc target_ip 4000" -
-3function duf { du -k $@ | sort -rn | perl -ne '($s,$f)=split(/\t/,$_,2);for(qw(K M G T)){if($s<1024){$x=($s<10?"%.1f":"%3d");printf("$x$_\t%s",$s,$f);last};$s/=1024}' }
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A short, *easy-er* to remember command for stripping whitespace and comments from a config file, (or any file for that matter). Remember regex as: slash, space, star. pound, slash, bar. pointy-hat, dollar. (or "caret, dollar" if you must) :-P
2grep -v "\ *#\|^$" /etc/path/to.config -
When you don't have c_rehash handy. Really simple - if you have a .pem file that doesn't really contain a x509 cert (let's say, newreq.pem), it will create a link, simply called '.0', pointing to that file.
4for file in *.pem; do ln -s $file `openssl x509 -hash -noout -in $file`.0; done -
67tr -c "[:digit:]" " " < /dev/urandom | dd cbs=$COLUMNS conv=unblock | GREP_COLOR="1;32" grep --color "[^ ]"
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avoid rm to be recursive until you complete the command: put the -rf at the end!
-3rm strangedirs -rf -
When a fs hangs and you've just one console, even # ls could be a dangerous command. Simply put a trailing "&" and play safe
2ls /mnt/badfs & -
If your last command was a dud, your bash prompt will be angry at you. Otherwise it's happy. Soon you will crave its constant approval and your linux skills will improve simply to avoid low self-esteem. Show Sample Output
17PS1="\`if [ \$? = 0 ]; then echo \e[33\;40m\\\^\\\_\\\^\e[0m; else echo \e[36\;40m\\\-\e[0m\\\_\e[36\;40m\\\-\e[0m; fi\` \u \w:\h)" -
less symbols, tab completion. including # export SIMPLE_BACKUP_SUFFIX="_`date +%F`" in your .bashrc provides you to easily timestamp your files
6cp -bfS.bak filename filename -
Windows only: stops windows update and the nagging restart window. You need your admin password for this one.
4runas /user:administrator net stop wuauserv -
when editing .bash_profile (or .bashrc), run this to use the new version without having to exit and open a new terminal
-6source ~/.bash_profile -
2cat myfile.txt | tr -d '\n'
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Note you have also the --xml option ;) Show Sample Output
3svn log | tr -d '\n' | sed -r 's/-{2,}/\n/g' | sed -r 's/ \([^\)]+\)//g' | sed -r 's/^r//' | sed -r "s/[0-9]+ lines?//g" | sort -g -
defines a handy function for quick calculations from cli. once defined:
? 10*2+3Show Sample Output58? () { echo "$*" | bc -l; } -
Useful if non-ascii characters in filenames have been improperly encoded. Replace "PROBLEM" with the incorrect characters (e.g. 'é'), and "FIX" with the correct ones (e.g. '?').
3for i in *;do mv "$i" "$(echo $i | sed s/PROBLEM/FIX/g)";done -
This command will replace all the spaces in all the filenames of the current directory with underscores. There are other commands that do this here, but this one is the easiest and shortest.
68rename 'y/ /_/' * -
Found it on snipt, pok3, is it yours? I put my user = m33600, the password and the status was my robot message: Settima robot message: ALARM ZONE 3 (sent via command line). Now bots may have their identity on twitter... Show Sample Output
2curl -u YourUsername:YourPassword -d status="Your status message go here" http://twitter.com/statuses/update.xml -
Skype has an internal regex which depicts the emoticons it supports. However you cannot simply search the binary file for it. This small 181 character line will do just that, provided skype is running. And of course, only works in linux. Show Sample Output
1S=`pidof skype`;grep heap /proc/$S/maps|cut -f1 -d' '|awk -F- '{print "0x" $1 " 0x" $2}'|xargs echo "du me t ">l;gdb -batch -p $S -x l>/dev/null 2>&1;strings t|grep \(smirk|head -n1 -
Use this if you don't have access to GNU grep's -B option.
4awk '/regex/{print x};{x=$0}' -
11:let i=0 | 'a,'bg/ZZZZ/s/ZZZZ/\=i/ | let i=i+1
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7( cd SOURCEDIR && tar cf - . ) | (cd DESTDIR && tar xvpf - )
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Don't have GNU tar installed that supports the redirect option (-C)? Use this. Show Sample Output
0pax -r -s ',^/,,' -f file.tar -
Oracle DBA remove some logfiles which are still open by the database and he is complaining the space has not been reclaimed? Use the above command to find out what PID needs to be stopped. Or alternatively recover the file via:
cp /proc/pid/fd/filehandle /new/file.txtShow Sample Output12find -L /proc/*/fd -links 0 2>/dev/null - ‹ First < 481 482 483 484 485 > Last ›
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