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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?

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Backup a directory structure

Copies a directory structure from /home/ to /backups/home (notice that the destination does not have a trailing slash)

prints line numbers

unbuffered python output

You have a python script that slowly prints output, you want to pipe the output to grep or tee, and you are impatient and want to watch the results right away. Rather than modify your script (making it slightly less efficient), use the -u option to have the output unbuffered.

Show top 50 running processes ordered by highest memory/cpu usage refreshing every 1s

http://alvinalexander.com/linux/unix-linux-process-memory-sort-ps-command-cpu for an overview of --sort available values

Generate random valid mac addresses

Doubt it actually generates valid mac addresses but this version doesn't need any external commands so it runs much faster. Much shorter as well.

Write a shell script that removes files that contain a string

Deletes files in the current directory or its subdirectories that match "regexp" but handle directories, newlines, spaces, and other funky characters better than the original #13315. Also uses grep's "-q" to be quiet and quit at the first match, making this much faster. No need for awk either.

count total number of lines of ruby code

Adapted from http://stackoverflow.com/questions/1358540/how-to-count-all-the-lines-of-code-in-a-directory-recursively#answer-1359246

Reinstall a Synology NAS without loosing any data from commandline.

Seen many questions how-to reinstall synology nas dsm without loosing data, here you go. Wait for a few min and then head over to http://nasip and setup your fresh installed nas.

Tail a log file with long lines truncated

This truncates any lines longer than 80 characters. Also useful for looking at different parts of the line, e.g. cut -b 50-100 shows columns 50 through 100.

Get your external IP address if your machine has a DNS entry

Easy way to see your real external IP

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