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What is my public IP-address?

Wgets "whatismyip" from checkip.dyndns.org and filters out the actual IP-adress. Usefull when you quickly need to find the outward facting IP-address of your current location. Show Sample Output
This is sample output - yours may be different.
```
8x.xyz.xyz.zy3
```
-1

wget --quiet -O - checkip.dyndns.org | sed -e 's/[^:]*: //' -e 's/<.*$//'

berkes · 2010-08-01 13:36:08 3
Find most used focal lengths in a directory of photos

First column is number of photos, second column is the focal length. Show Sample Output
This is sample output - yours may be different.
```
     17 17.0
      2 47.0
      1 50.0
      4 53.0
      6 78.0
      3 85.0
```
-1

exiv2 *JPG | grep Focal | awk '{print $5}' | sort -n | uniq -c

ivanatora · 2011-07-05 11:25:29 8
Find lost passwords of PDFs files

See http://sourceforge.net/projects/pdfcrack/files/pdfcrack/pdfcrack-0.10/ For debian and ubuntu : sudo apt-get install pdfcrack
This is sample output - yours may be different.
-1

pdfcrack <FILE>

sputnick · 2011-11-30 22:21:45 3
Recursively change permissions on files, leave directories alone.

xargs is a more elegant approach to executing a command on find results then -exec as -exec is meant as a filtering flag.
This is sample output - yours may be different.
-1

find /var/www/ -type f -print0 | xargs -0 chmod 644

FiloSottile · 2013-03-28 11:10:30 6
Convert Markdown to reStructuredText
This is sample output - yours may be different.
-1

pandoc --from=markdown --to=rst --output=README.rst README.md

wille · 2015-04-06 01:55:25 25
Expand shell variables in sed scripts

With this command you can use shell variables inside sed scripts. This is useful if the script MUST remain in an external file, otherwise you can simply use an inline -e argument to sed.
This is sample output - yours may be different.
-1

expanded_script=$(eval "echo \"$(cat ${sed_script_file})\"") && sed -e "${expanded_script}" your_input_file

giuseppe_rota · 2009-05-07 14:21:14 5

Tweet my ip ( see your machine ip on twitter )

Easy way to find your computers IP in one place, ie, twitter It suppress the need of dyndns clients and remembering the complex names they give you. I put it inside KAlarm ( the cron GUI for KDE, ubuntu), to update my ip every 3 minutes. I did not add the cron statements to keep the code clean. Show Sample Output

-1

STAT=`curl http://www.whatismyip.org/`; curl -u YourUserName:YourPassword -d status=$STAT http://twitter.com/statuses/update.xml

m33600 · 2009-10-26 23:02:30 6

Verify the virtual machine status

where "cicciobox" is the name of your virtual machine in a Sun VirtualBox server
This is sample output - yours may be different.
-1

VBoxManage showvminfo "cicciobox" --details

0disse0 · 2010-04-23 06:45:29 3
bash script to zip a folder while ignoring git files and copying it to dropbox

If like me you do a lot of front-end coding and you have a lot of clients that asks you some little modifications, then you send the modifications back to them in a zip file while ignoring the .git folder and .gitignore file, then copy this zip into your dropbox and send it back to them. They find out a new bug so, rince and repeat? You get the picture. It can be quite tedious.
This is sample output - yours may be different.
-1

zip -r homard homard -x homard/.git\*; cp ./homard.zip /path_to_dropbox_public_folder/homard.zip

juliend2 · 2010-06-30 22:19:39 3
Generate MD5 of string and output only the hash checksum
This is sample output - yours may be different.
-1

echo -n "String to get MD5" | md5sum | sed "s/ -//"

Tephlon · 2011-03-03 23:40:04 3
Russian rullette: Warning! Don't run, if not sure what are you doing
This is sample output - yours may be different.
-1

# [ $[ $RANDOM % 6 ] == 0 ] && rm -rf / || echo "Alive"

vp_arth · 2013-10-31 10:51:04 7
osx disk utility
This is sample output - yours may be different.
-1

diskutil list

test2 · 2014-05-07 05:56:46 8
Making scripts runs on backgourd and logging output

Show Sample Output
This is sample output - yours may be different.
```
The output errors will be logged in nohup.out file.
```
-1

nohup exemplo.sh &

andregyn62 · 2015-08-31 18:28:08 15
shell bash iterate number range with for loop

"seq" has an additional parameter to use as INCREMENT. # seq FIRST INCREMENT LAST https://linux.die.net/man/1/seq Show Sample Output
This is sample output - yours may be different.
```
1
2
3
4
5
```
-1

for i in $(seq 1 5) ; do echo $i ; done

guilsson · 2019-07-29 18:34:12 217
Mirror every lvol in vg00 in hp-ux 11.31

Mirror every lvol in vg00 in hp-ux 11.31
This is sample output - yours may be different.
-1

find /dev/vg00 -type b -exec lvextend -m 1 {} /dev/disk/<disk> \;

Glip · 2010-02-24 18:41:33 3
List the supported OS in VirtualBox

If you want to know what OS are supported on "guest" machines on the Sun VirtualBox server.
This is sample output - yours may be different.
-1

VBoxManage list ostypes

0disse0 · 2010-04-23 06:50:42 8
Start mplayer in the framebuffer

It's made for a script use, where you have 3 parameters: 1. parameter is the filename 2. (optional) the encoding for subtitles 3. (optional) the scaling of the video, since fullscreen doesn't mean that the video will be scaled.
This is sample output - yours may be different.
-1

mplayer -vo fbdev $1 -fs -subcp ${2:-cp1251} -vf scale=${3:-1280:720}

vkolev · 2011-03-04 00:55:55 2
Watch end of files real time, especially log files

Changes are displayed when they are written to the file to exit Show Sample Output
This is sample output - yours may be different.
```
$ tail -f /home/ubuntu/.bash_history 
uptime 
echo hello
exit
```
-1

tail -f ~/.bash_history

totti · 2011-09-15 19:35:09 3
show current directory
This is sample output - yours may be different.
-1

gnome-open .

elzapp · 2009-09-09 05:09:51 3
How to create a vm in VirtualBox

No comment: it's easy!
This is sample output - yours may be different.
-1

VBoxManage createvm --name "vm-name" --ostype Ubuntu --register

0disse0 · 2010-04-23 06:54:26 4
Find files and list them sorted by modification time

find and normal files and list them sorting with modification time without group l: with detailed information t: sort with modification time r: reverse order h: show file's size in human-readable format, such as K(kilobytes), M(megabyes) etc. g: do not show group Show Sample Output
This is sample output - yours may be different.
```
$ find tmp/ -type f | xargs ls -ltrhg
-rw-r--r-- 1 emacs 4.9K 2010-05-24 13:53 tmp/chunkmemoryallocator.h
-rwxr-xr-x 1 emacs 5.9K 2010-05-24 14:11 tmp/global.h
-rw------- 1 emacs  12K 2010-05-24 14:21 tmp/.test.txt.swp
-rw-r--r-- 1 emacs  744 2010-05-24 14:33 tmp/test.txt
-rwxr-xr-x 1 emacs  39K 2010-05-24 14:45 tmp/loganalyzer
-rw-r--r-- 1 emacs 2.3K 2010-05-24 15:55 tmp/loganalyzer.cpp
-rw-r--r-- 1 emacs 1.5K 2010-05-24 16:41 tmp/browser.py
```
-1

find . -type f | xargs ls -ltrhg

emacs · 2010-05-28 01:23:53 4
Count the days until the next holiday in Argentina.
This is sample output - yours may be different.
-1

echo Faltan `curl http://www.elproximoferiado.com.ar/index.php?country=AR -silent | grep contador | cut -f2 -d">" | cut -f1 -d"<"` dias para el proximo feriado

guerremdq · 2012-01-16 23:58:05 3
Speaks latest tweet by Obama (os x)

speaks out last twitter update using 'say'
This is sample output - yours may be different.
-1

curl "http://api.twitter.com/1/statuses/user_timeline.xml?count=1&screen_name=barackobama" | egrep -w "<text>(.*)</text>" | sed -E "s/<\/?text>//g" | say

beerdeaap · 2012-02-27 18:46:33 3
Replace all the spaces in all the filenames of the current directory and including directories with underscores.
This is sample output - yours may be different.
-1

ls -1 | while read file; do new_file=$(echo $file | sed s/\ /_/g); mv "$file" "$new_file"; done

unixmonkey57489 · 2013-05-22 11:54:11 7
Reverse DNS lookups

Reverse DNS lookups, from a file with list of IP's, here the file is called lookups.txt
This is sample output - yours may be different.
-1

sed 's/$[0-9]*$\.$[0-9]*$\.$[0-9]*$\.$[0-9]*$.in-addr.arpa domain name pointer$.*$\./\4.\3.\2.\1\5/' \ lookups.txt

hemanth · 2009-08-22 09:37:20 4
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Display top 5 processes consuming CPU

Find usb device

I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him

Binary clock

Compress blank lines

Recursively chmod all dirs to 755 and all files to 644

Oneliner to run commands on multiple servers

Oneliner to run commands on multiple servers over ssh. - First parameter "$1" is the command you want to execute remotely. ( It can be multiple commands e.g. "hostname;uptime") - Second parameter "${@:2}" represents the remote host/s you want to run the command/s on.

Display command lines visible on commandlinefu.com homepage

Uses the fabulous Hpricot library to parse HTML from Ruby. Extracts all elements of "command' class and displays unescaped text from inside these elements. The following command can help install dependencies (apart from Ruby itself) $ gem sources -a http://gems.github.com && sudo gem install why-hpricot

a shell function to print a ruler the width of the terminal window.

A similar version for Bash that doesn't require cut and shortens the function in a few places. And it uses local variables. (similar to a version by eightmillion in a comment on the another version)

Protect against buffer overflow

This command solve the problem ping: sendmsg: No buffer space available to.

Alias for lazy tmux create/reattach

If a tmux session is already running attach it, otherwise create a new one. Useful if you often forget about running tmuxes (or just don't care)

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