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Clear disk space by retaining only currently running Docker containers and only currently required Docker images.

Useful if your Docker host starts running out of disk space due to Docker debris. You should start by running "sudo docker ps" in order to check that all required containers are in fact running, and fix any that aren't before proceeding to the main event! "sudo docker rm $(sudo docker ps -q -f status=exited)" removes all containers which are no longer running. "sudo docker rmi $(sudo docker images -q -f dangling=true)" removes all Docker images not required for currently running containers.
This is sample output - yours may be different.
0

sudo docker rm $(sudo docker ps -q -f status=exited); sudo docker rmi $(sudo docker images -q -f dangling=true)

Roundand · 2017-04-25 11:29:19 23
show mysql process ids

Show Sample Output
This is sample output - yours may be different.
```
2
3131
3210
5633
6032
6061
6375
6588
6772
7092
7499
7663
```
0

mysql -s -e "show processlist" |awk '{print $1}'

aravind040 · 2009-05-27 07:22:05 5
Search for specific IPs taken form a text file within the apache access log

bnd-ips.txt is a list of IP adresses that is concenated for use as regular expression. Yes, this is still very speedy ;=)
This is sample output - yours may be different.
0

grep -E ":(`cat bnd-ips.txt | sed 's/\./\\./g' | tr '\n' '|'`)" access.log

Cowboy · 2009-07-30 12:54:55 6
Visualizing system performance data

draw `vmstat ` data using gnuplot
This is sample output - yours may be different.
0

vmstat 2 10 | awk 'NR > 2 {print NR, $13}' | gnuplot -e "set terminal png;set output 'v.png';plot '-' u 1:2 t 'cpu' w linespoints;"

Sunng · 2009-09-23 07:19:47 3
Search pattern case insensitive
This is sample output - yours may be different.
0

:/\c{pattern}

yohananov · 2010-03-22 11:23:08 3
List file/directories in order of last accessed, in human readable terms

Especially useful with a command line podcatcher like Mashpodder. Show Sample Output
This is sample output - yours may be different.
```
drwxr-xr-x 2 mark users 4.0K Mar 29 23:01 LottaLinuxLinks
drwxr-xr-x 2 mark users 4.0K Mar 29 21:53 x11r5Radio
drwxr-xr-x 2 mark users 4.0K Mar 29 21:53 TLLTS
drwxr-xr-x 2 mark users 4.0K Mar 29 21:53 Linux.Outlaws.Ogg
```
0

ls -lth podcasts/

ricemark20 · 2011-03-30 18:47:02 3
Quick enter into a single screen session
This is sample output - yours may be different.
0

alias screenr='screen -r $(screen -ls | egrep -o -e '[0-9]+' | head -n 1)'

yababay · 2011-05-12 05:44:39 5
Power cd - Add a couple of useful features to 'cd'

Move efficiently between directories. . This command adds a couple of extra features to cd, without affecting normal use. CDPATH use is also unaffected. It introduces and environment variable CDDIR which is used as an alternate home directory. . Note: I don't want to alter $HOME because then all my dot files will move. . Examples: . cd dir Change directory to "dir" (using CDPATH if necessary) . cd dir/file.txt Change directory to "dir" (containing folder of "file.txt") This allows you to cut'n'paste, or use . CDDIR is unset cd Change directory to $HOME . CDDIR=/home/flatcap/work cd Change directory to /home/flatcap/work . For convenience, put the command, and the following, in your .bashrc or .bash_profile export CDDIR="/home/flatcap/work" alias cdd="CDDIR=$(pwd)" Show Sample Output
This is sample output - yours may be different.
```
~$ export CDDIR=/home/flatcap/work
~$ cd
~/work$ unset CDDIR
~/work$ cd
~$
```
0

cd() { if [ -n "$1" ]; then [ -f "$1" ] && set -- "${1%/*}"; else [ -n "$CDDIR" ] && set -- "$CDDIR"; fi; command cd "$@"; }

flatcap · 2011-06-24 08:48:13 10
find broken symbolic links

find broken symbolic links Show Sample Output
This is sample output - yours may be different.
```
lrwxrwxrwx 1 nobody nobody 43 2010-03-15 13:00 /mnt/retorn -> /opt/retorn
```
0

find . -type l | (while read FN ; do test -e "$FN" || ls -ld "$FN"; done)

pathcl · 2011-08-02 14:48:47 5
Upload documents from linux to MS SHarepoint using curl

Use Curl to upload documents from your linux servers to MS Sharepoint servers.
This is sample output - yours may be different.
0

curl --ntlm -u <your Active-Directory-Domain>/<your-domain-username> -T /path/to/local/$FILE http://sharepoint.url.com/doc/library/dir/

barnesmjsa · 2011-09-08 18:08:58 3
Push to all remote repos with git
This is sample output - yours may be different.
0

git remote | xargs -n 1 git push

rickard2 · 2012-02-11 17:41:52 3
pdftk append with handles
This is sample output - yours may be different.
0

pdftk A=1.pdf B=2.pdf C=3.pdf cat C A output CA.pdf

bossNova · 2012-03-28 15:41:44 22
List all symlinks and see where they link to
This is sample output - yours may be different.
0

find -type l | xargs ls -l

samer · 2012-05-15 22:34:51 3
Find the 10 lusers winners of the "I take up the most disk space" award

the -h option of du and sort (on appropriate distrib) makes output "Human" readable and still sorted by "reversed size" (sort -rh) Show Sample Output
This is sample output - yours may be different.
```
55G	/home/user32
19G	/home/user45
6.7G	/home/user89
16M	/home/user02
64K	/home/user57
```
0

du -sh /home/*|sort -rh|head -n 10

toaster · 2012-09-12 11:54:06 5
avoid ssh hangs using jobs

Execute commands serially on a list of hosts. Each ssh connection is made in the background so that if, after five seconds, it hasn't closed, it will be killed and the script will go on to the next system. Maybe there's an easier way to set a timeout in the ssh options...
This is sample output - yours may be different.
0

for host in $MYHOSTS; do ping -q -c3 $H 2>&1 1>/dev/null && ssh -o 'AllowedAuthe ntications publickey' $host 'command1; command2' & for count in 1 2 3 4 5; do sleep 1; jobs | wc -l | grep -q ^0\$ && continue; done; kill %1; done

a8ksh4 · 2012-11-13 23:12:27 5
Go get those photos from a Picasa album (full size)
This is sample output - yours may be different.
0

wget -O - "[PICASA ALBUM RSS LINK]" |sed 's/</\n</g' | grep media:content |sed 's/.*url='"'"'$[^'"'"']*$'"'"'.*$/\1/' |awk -F'/' '{gsub($NF,"d/"$NF); print $0}'|wget -i -

mxac · 2013-03-16 15:48:41 4
vi show line numbers

Prints line numbers making it easier to see long lines that wrap in your terminal and extra line breaks at the end of a file. :set nu works too. Show Sample Output
This is sample output - yours may be different.
```
1 sample text file
2 blah blah blah
3 last line
4
```
0

:set number

sonic · 2013-10-07 15:03:52 6
Remove all .DS_Store files from the current directory (recursive)

May require GNU find.
This is sample output - yours may be different.
0

find . -name "*.DS_Store" -type f -delete

nicolasmccurdy · 2014-07-16 02:03:38 8
This command uses dd, pv, and dialog command to display an updated progress bar while using the dd command. This is useful to see the status of a dd in progress when creating very large dumps or coping hard disk devices using dd command.
This is sample output - yours may be different.
0

(pv -n /dev/sda | dd of=/dev/sdb bs=128M conv=notrunc,noerror) 2>&1 | dialog --gauge "Running dd command (cloning), please wait..." 10 70 0

skinners · 2014-11-07 16:24:26 13
function: permanent alias

Yes, it is not a command. Yes, you need to add it to your init script. Yes, you need to define $SH_ALIASES filename. But this shit can be very useful.
This is sample output - yours may be different.
0

function cmd () {echo 'alias '$1'="'${@:2}'"' >> $SH_ALIASES; . $SH_ALIASES }; . $SH_ALIASES;

romgrk · 2015-06-28 21:21:52 9
Diff two directories by finding and comparing the md5 checksums of their contents.

Results will be shown in columns. Only different files and files in one directory that is not in the other will be shown.
This is sample output - yours may be different.
0

diff -y --suppress-common-lines <(sort -k2 <(md5deep -r -b directory1)) <(sort -k2 <(md5deep -r -b directory2))

MeLoPasoPipa · 2016-08-18 09:17:16 12
Make color transparent
This is sample output - yours may be different.
0

mogrify -path ../png_transparent/ -fuzz 3.4% -transparent "#50566b" *.png

ceddi · 2016-10-17 19:49:04 17
Display which distro is installed

Cleaner than the top alternative Show Sample Output
This is sample output - yours may be different.
```
Distributor ID:	Debian
Description:	Debian GNU/Linux 8.7 (jessie)
Release:	8.7
Codename:	jessie
```
0

test `uname` = Linux && lsb_release -a 2>/dev/null || ( test `uname` = SunOS && cat /etc/release || uname -rms )

amhhhhhhh · 2017-04-25 13:35:40 21
Silently Execute a Shell Script that runs in the background and won't die on HUP/logout
This is sample output - yours may be different.
0

(nohup your-command your-args &>/dev/null &)

socketz · 2018-05-23 17:35:43 189
Force file system check
This is sample output - yours may be different.
0

touch /forcefsk

rimaya · 2009-02-06 09:19:46 11
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check open ports without netstat or lsof

List of computers not logged into in more than four weeks

Rename all files which contain the sub-string 'foo', replacing it with 'bar'

That is an alternative to command 8368. Command 8368 is EXTREMELY NOT clever. 1) Will break also for files with spaces AND new lines in them AND for an empty expansion of the glob '*' 2) For making such a simple task it uses two pipes, thus forking. 3) xargs(1) is dangerous (broken) when processing filenames that are not NUL-terminated. 4) ls shows you a representation of files. They are NOT file names (for simple names, they mostly happen to be equivalent). Do NOT try to parse it. Why? see this :http://mywiki.wooledge.org/ParsingLs Recursive version: $ find . -depth -name "*foo*" -exec bash -c 'for f; do base=${f##*/}; mv -- "$f" "${f%/*}/${base//foo/bar}"; done' _ {} +

ignore .DS_Store forever in GIT

With a couple of little commands, you?ll be able to ignore the .DS_Store files forever from your git repositories on mac! The following command will add the .gitignore file to the git configuration git config --global core.excludesfile ~/.gitignore then, the following, will add the .DS_Store to the list echo .DS_Store >> ~/.gitignore

apt-get upgrade with bandwidth limit

Trickle is here: http://monkey.org/~marius/pages/?page=trickle Trickle is a simple bandwidth limiter

List files with full path

delete multiple files from git index that have already been deleted from disk

delete multiple files from git index that have already been deleted from disk. this is pretty terrible, I'm looking for a better way. (much better!! http://www.commandlinefu.com/commands/view/1246/git-remove-files-which-have-been-deleted)

Google Translate

$ translate [output-language] [source-language] 1) "some phrase" should be in quotes 2) [output-language] - optional (default: English) 3) [source-language] - optional (default: auto) $ translate "bonjour petit lapin" hello little rabbit $ translate "bonjour petit lapin" en hello little rabbit $ translate "bonjour petit lapin" en fr hello little rabbit

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Clone or rescue a block device

If you use the logfile feature of ddrescue, the data is rescued very efficiently (only the needed blocks are read). Also you can interrupt the rescue at any time and resume it later at the same point. http://www.gnu.org/software/ddrescue/ddrescue.html

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