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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 18:34:12 203
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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Makes the permissions of file2 the same as file1

Also works with: $chgrp --reference file1 file2 $chown --reference file1 file2

Print all 256 colors for testing TERM or for a quick reference

This is super fast and an easy way to test your terminal for 256 color support. Unlike alot of info about changing colors in the terminal, this uses the ncurses termcap/terminfo database to determine the escape codes used to generate the colors for a specific TERM. That means you can switch your terminal and then run this to check the real output. $ tset xterm-256color at any rate that is some super lean code! Here it is in function form to stick in your .bash_profile aa_256 () { ( x=`tput op` y=`printf %$((${COLUMNS}-6))s`; for i in {0..256}; do o=00$i; echo -e ${o:${#o}-3:3} `tput setaf $i;tput setab $i`${y// /=}$x; done ) } From my bash_profile: http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

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"

Real full backup copy of /etc folder

Yes, rsync(1) supports local directories. And, should anything change, it's trivial to run the command again, and grab only the changes, instead of the full directory.

Get Dollar-Euro exchage rate

You can get others rates changing the "EUR/US" part. look at the url: wap.kitco.com/exrate.wml to get more options.

Word-based diff on reformatted text files

It can be hard to spot differences in reformatted files, because of all the diff noise created by word wrapped lines. This command removes all the noise and performs a word-by-word diff. To ignore empty lines, add -B to the diff command. Also, if this is something you do often, you might want to check out the wdiff(1) program.

Count Files in a Directory with Wildcards.

Remove the '-maxdepth 1' option if you want to count in directories as well

Extract neatly a rar compressed file

It's also possible to delay the extraction (echo "unrar e ... fi" |at now+20 minutes) wich is really convenient!

Advanced python tracing

Trace python statement execution and syscalls invoked during that simultaneously

watch snapshots commit in VMware ESX

To monitor .vmdk files during snapshot deletion (commit) on ESX only (ESXi doesn't have the watch command): 1. Navigate to the VM directory containing .vmdk files. # watch "ls -tough --full-time *.vmdk" where: -t sorts by modification time -o do not list group information (to narrow the output) -u sorts by access time -g only here for the purpose to easily remember the created mnemonic word 'tough' -h prints sizes in human readable format (e.g., 1K 234M 2G) --full-time sets the time style to full-iso and does not list user information (to narrow the output) optionally useful parameters to the watch command: -d highlight changes between updates -n seconds to wait between updates (default is 2) -t turn off printing the header

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