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Create a local compressed tarball from remote host directory
This is sample output - yours may be different.
0

ssh user@host "tar -czf - /path/to/dir" > dir.tar.gz

mossholderm · 2011-12-15 04:12:54 2
Kill all threads from a MySQL user

Kills all the threads from the user provided in the WHERE request. Can be refined through the SQL request, of course, see http://dev.mysql.com/doc/refman/5.1/en/processlist-table.html for the available columns.
This is sample output - yours may be different.
0

mysql -BNe "SELECT id FROM processlist WHERE user = 'redmine';" information_schema | while read id; do mysqladmin kill $id; done

anarcat · 2012-03-09 17:37:23 7
Show duplicate lines in a file

The following displays only the entries that are duplicates. Show Sample Output
This is sample output - yours may be different.
```
2 Alex Jason:200:Sales
2 Emma Thomas:100:Marketing
```
0

sort namesd.txt | uniq ?cd

ankush108 · 2012-06-26 19:23:58 3
Show alive host on network
This is sample output - yours may be different.
0

nmap -sP 192.168.0.* | grep Host | tr "(" ")" | cut -d\) -f2

szimbaro · 2013-02-27 12:40:45 4
remove duplicate with change order
This is sample output - yours may be different.
0

awk '{if(!seen[$0]++) {print $0;}}'

kotokz · 2013-07-01 03:46:18 7
Detect Connections On Port - Android

Show If Someone Is Connected To The Android Device On And Get Their IP Address
This is sample output - yours may be different.
0

netstat -lptu | grep -E "22.*ESTABLISHED" | cut -s -d ':' -f2 | awk '{print $2}'

DarkXDroid · 2014-06-13 08:38:16 23
Print out which hosts are not running specific process

Given a hosts list, ssh one by one and echo its name only if 'processname' is not running. Show Sample Output
This is sample output - yours may be different.
```
hostone
hosttwo
hostthree
```
0

for i in `cat hosts_list`; do RES=`ssh myusername@${i} "ps -ef " |awk '/[p]rocessname/ {print $2}'`; test "x${RES}" = "x" && echo $i; done

arlequin · 2014-10-03 14:57:54 9

Fetches NOAA text product weather data. (US only)

The only requirement to make this work is some research on what your local NOAA "zone" is. One place to take a look is: http://www.nws.noaa.gov/mirs/public/prods/maps/pfzones_list.htm Show Sample Output

wget -q -O - http://weather.noaa.gov/pub/data/observations/state_roundup/ny/nyz003.txt http://weather.noaa.gov/pub/data/forecasts/zone/ny/nyz003.txt | less

nanoscript · 2015-01-17 05:09:05 7

Use /etc/fortune as signature in thunderbird

In Thunderbird open the settings for your email account, mark the checkbox for 'Attach the signature from a file instead' and use the filename '~/mailsignature.txt' Now every time when you open a terminal you see the fortune displayed in the terminal and the mail signature gets regenerated. Show Sample Output
This is sample output - yours may be different.
```
--
After an instrument has been assembled, extra components will be found on the bench.
```
0

echo 'echo /etc/games/fortune > ~/mailsignature.txt' >> .bashrc

dededede · 2015-11-07 15:17:12 11
Shows the size of folders and files, sorted from highest to lowest

Shows the size of folders and files, sorted from highest to lowest in human format (gb, mb,kb,etc...) Very useful to see the folders that are occupying more space. Show Sample Output
This is sample output - yours may be different.
```
88G	home
6,8G	usr
5,4G	var
860M	lib
666M	opt
152M	boot
49M	data
17M	etc
13M	sbin
13M	run
13M	bin
420K	dev
188K	root
16K	tmp
```
0

du -sh * | sort -rh

khain · 2017-04-03 10:23:40 33
list bosh2 deployments
This is sample output - yours may be different.
0

bosh deployments --json | jq '.Tables[0].Rows[][0]' --raw-output

jim80net · 2017-05-23 21:08:01 17
Connect to docker as root
This is sample output - yours may be different.
0

docker run -u 0 -it container_id /bin/bash

tofu00 · 2017-11-29 10:08:25 21
repeat any string or char n times without spaces between

Using zsh parameter expansion Show Sample Output
This is sample output - yours may be different.
```
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
```
0

echo ${(l:80::+:)}

rjf89 · 2018-01-04 18:34:16 20
generate pem cert from host with ssl port
This is sample output - yours may be different.
0

openssl s_client -connect HOSTNAME.at:443 -showcerts </dev/null 2>/dev/null | openssl x509 -outform PEM > meinzertifikat.pem

dbiesecke · 2021-09-01 14:05:36 185
Customizable Search Context

customizable context searches - if you know sed, this is a basis for more complex context control than grep --context offers Show Sample Output
This is sample output - yours may be different.
```
$ echo -n search\>\  ; read SEARCH_STRING && sed -n "/$SEARCH_STRING/{n;p;n;p;n;p;q}" /etc/passwd
search> sshd
suse-ncc:x:105:107:Novell Customer Center User:/var/lib/YaST2/suse-ncc-fakehome:/bin/bash
uucp:x:10:14:Unix-to-Unix CoPy system:/etc/uucp:/bin/bash
uuidd:x:100:101:User for uuidd:/var/run/uuidd:/bin/false
```
0

echo -n search\>\ ; read SEARCH_STRING && sed -n "/$SEARCH_STRING/{n;p;n;p;n;p;q}" [file-to-search]

wwest4 · 2009-02-05 18:07:23 28
Activate the mandatory proxy under ubuntu

Solution to activate (or deactivate with false instead of true) the global mandatory proxy under Ubuntu (not tested elsewhere). Others keys you can configure : gconftool-2 --set "/system/http_proxy/host" --type string " gconftool-2 --set "/system/http_proxy/port" --type int 8080 gconftool-2 --set "/system/http_proxy/ignore_hosts" --type list --list-type string ["localhost","127.0.0.1","*.local"] gconftool-2 --set "/system/proxy/mode" --type string manual
This is sample output - yours may be different.
0

gconftool-2 --set "/system/http_proxy/use_http_proxy" --type boolean true

Kysic · 2009-02-13 22:00:52 10
Open windows executable, file, or folder from cygwin terminal

This executes faster than cygstart.exe I put this in a script and added it to my path: cat `which explore.sh` #!/bin/bash if [ $# -eq 0 ]; then explorer.exe $( cygpath `pwd` -w ) & else explorer.exe $( cygpath $1 -w ) & fi; Using the script you just type explore.sh file_or_executable Note: you can do this for any file that has an associated executable in the windows registry. This is quite handy if you want to open pictures or movies from xterm. Show Sample Output
This is sample output - yours may be different.
```
$ explorer $( cygpath "/path/to/executable" -w ) # Run the windows executable
$ explorer $( cygpath "movie file.avi" -w ) # Plays movie file with default player
$ explorer $( cygpath "/path/to/a folder" -w ) # Opens a folder in windows explorer
```
0

explorer $( cygpath "/path/to/file_or_exe" -w )

Highwayman · 2009-07-22 17:00:21 3640
How to check webserver by Nikto

This is wonderful perl script to check the web server security and vulnerability .Get it from here :http://www.cirt.net/nikto2 Here are some key features of "Nikto": ? Uses rfp's LibWhisker as a base for all network funtionality ? Main scan database in CSV format for easy updates ? Determines "OK" vs "NOT FOUND" responses for each server, if possible ? Determines CGI directories for each server, if possible ? Switch HTTP versions as needed so that the server understands requests properly ? SSL Support (Unix with OpenSSL or maybe Windows with ActiveState's Perl/NetSSL) ? Output to file in plain text, HTML or CSV ? Generic and "server type" specific checks ? Plugin support (standard PERL) ? Checks for outdated server software ? Proxy support (with authentication) ? Host authentication (Basic) ? Watches for "bogus" OK responses ? Attempts to perform educated guesses for Authentication realms ? Captures/prints any Cookies received ? Mutate mode to "go fishing" on web servers for odd items ? Builds Mutate checks based on robots.txt entries (if present) ? Scan multiple ports on a target to find web servers (can integrate nmap for speed, if available) ? Multiple IDS evasion techniques ? Users can add a custom scan database ? Supports automatic code/check updates (with web access) ? Multiple host/port scanning (scan list files) ? Username guessing plugin via the cgiwrap program and Apache ~user methods Show Sample Output
This is sample output - yours may be different.
```
nikto.pl -h webserv
- Nikto v2.03/2.04
---------------------------------------------------------------------------
+ Target IP:          198.162.5.2
+ Target Hostname:    wevserv
+ Target Port:        80
+ Start Time:         2009-08-30 10:17:12
---------------------------------------------------------------------------
+ Server: Apache/2.2.0 (Fedora)
+ No CGI Directories found (use '-C all' to force check all possible dirs)
+ Apache/2.2.0 appears to be outdated (current is at least Apache/2.2.9). Apache 1.3.39 and 2.0.61 are also current.
+ OSVDB-877: TRACE / : TRACE option appears to allow XSS or credential theft. See http://www.cgisecurity.com/whitehat-mirror/WhitePaper_screen.pdf for details
+ 3577 items checked: 2 item(s) reported on remote host
+ End Time:        2009-08-30 10:17:21 (9 seconds)
---------------------------------------------------------------------------
+ 1 host(s) tested

Test Options: -h webserv
---------------------------------------------------------------------------
```
0

nikto.pl -h yourwebserver

unixbhaskar · 2009-08-29 04:54:43 8
Bash function to see what the day ends in

A command to find out what the day ends in. Can be edited slightly to find out what "any" output ends in. NB: I haven't tested with weird and wonderful output. Show Sample Output
This is sample output - yours may be different.
```
y
```
0

date +%A | cut -c $(( $(date +%A | wc -c) - 1 ))

DaveQB · 2010-04-07 00:23:15 5
list all file extensions in a directory

If we want files with more than one extension, like .tar.gz, only appear the latest, .gz: ls -Xp /path/to/dir | grep -Eo "\.[^./]+$" | uniq Show Sample Output
This is sample output - yours may be different.
```
.tar.gz
.py
.pyc
```
0

ls -Xp /path/to/dir | grep -Eo "\.[^/]+$" | uniq

karpoke · 2010-08-12 16:32:54 6
Bulk add urls to your Instapaper account

Note, you need to replace the email address with your private Instapaper email address. There are a bunch of possible improvements such as, - Not writing a temp file - Doesnt strip tags (tho Instapaper does thankfully) - Shouldnt require 2 curls
This is sample output - yours may be different.
0

for url in `cat urls `; do title=`curl $url 2>&1 | grep -i '<title>.*</title>'` && curl $url > /tmp/u && mail -s "$title" your-private-instapaper-address@instapaper.com < /tmp/u ; done

iamarchimedes · 2010-10-16 19:10:19 4
find a particular string on an unmounted partition
This is sample output - yours may be different.
0

hexdump -e '8/1 "%02X ""\t"" "' -e '8/1 "%c""\n"' /dev/sda1 | less /mystring

gerard · 2010-12-17 10:28:40 4
Displays the packages which contain the specified file.
This is sample output - yours may be different.
0

dpkg -S locale.alias

repson0 · 2011-01-05 21:41:41 3
Generate Pascal's Triangle

http://en.wikipedia.org/wiki/Pascal%27s_triangle This one's for bartonski. Enjoy. 132 characters. I'm sure we can do better. Note: after row 64 we overflow integer maths. Show Sample Output
This is sample output - yours may be different.
```
1 
1 1 
1 2 1 
1 3 3 1 
1 4 6 4 1 
1 5 10 10 5 1 
1 6 15 20 15 6 1 
1 7 21 35 35 21 7 1 
1 8 28 56 70 56 28 8 1 
```
0

for((r=1;r<10;r++));do v=1;echo -n "$v ";for((c=1;c<$r;c++));do v2=$(($(echo "$v*($r-$c)/$c")));echo -n "$v2 ";v=$v2;done;echo;done

flatcap · 2011-02-10 18:38:04 239
How to expire the password to force her change [AIX]

This command is AIX compatible. It will prompt the user for a new password at next logon
This is sample output - yours may be different.
0

pwdadm -f ADMCHG [user]

mack · 2011-04-28 02:22:03 11
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What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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Takes and displays screenshot of Android phone over adb.

Dependencies on phone: adb access, screencap command, base64 command. Dependencies on computer: adb, sed, base64, display (from imagemagick, but can substitute other image viewer which reads from stdin). This should work around adb stupidies (i.e. that it replaces \n with \r\n) with base64.

erase content from a cdrw

Get me yesterday's date, even if today is 1-Mar-2008 and yesterday was 29-Feb-2008

Fool date by setting the timezone out by 24 hours and you get yesterday's date. Try TZ=XYZ-24 to get tomorrow's date. I live in TZ=GMT0BST so you might need to shift the number 24 by the hours in your timezone.

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Easy way to scroll up und down to change to one of n last visited directories.

This alias is meant to append n (here is n=10) most recently used cd commands to the bottom of history file. This way you can easily change to one of previous visited directories simply by hitting 1-10 times arrow up key. Hint: You can make more aliases implying the same rule for any set of frequently used long and complex commands like: mkisof, rdesktop, gpg...

List the most recent dates in reverse-chronological order

bash brace expansion, sequence expression

List last opened tabs in firefox browser

Tuned for short command line - you can set the path to sessionstore.js more reliable instead of use asterixes etc. Usable when you are not at home and really need to get your actual opened tabs on your home computer (via SSH). I am using it from my work if I forgot to bookmark some new interesting webpage, which I have visited at home. Also other way to list tabs when your firefox has crashed (restoring of tabs doesn't work always). This script includes also tabs which has been closed short time before.

Define words and phrases with google.

This version works on Mac (avoids grep -P, adding a sed step instead, and invokes /usr/bin/perl with full path in case you have another one installed). Still requires that you install perl module HTML::Entities ? here's how: http://www.perlmonks.org/?node_id=640489

Find out when your billion-second anniversary is (was). (on OS X)

This is the same command as this one, but for OS X. http://www.commandlinefu.com/commands/view/3053/find-out-when-your-billion-second-anniversary-is-was.

Listing directory content of a directory with a lot of entries

Ever wanted to get the directory content with 'ls' or 'find' and had to wait minutes until something was printed? Perl to the rescue. The one-liner above(redirected to a file) took less than five seconds to run in a directory with more man 2 million files. One can adapt it to e.g. delete files that match a certain pattern.

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