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free swap

simple way to show free swap Show Sample Output
This is sample output - yours may be different.
```
2979
```
-2

free -m | awk '/Swap/ {print $4}'

voyeg3r · 2009-09-02 11:46:17 3
Find all dot files and directories

trying to copy all your dotfiles from one location to another, this may help Show Sample Output
This is sample output - yours may be different.
```
.bash_profile
.bashrc
.ssh
```
-2

ls -a | egrep "^\.\w"

kulor · 2009-11-11 18:19:56 12
Facebook e-mail header X-Facebook IP deobfuscator

Currently Facebook has updated their headers to display 127.0.0.1 but if you have saved e-mails from messages and FB related mail you can still reveal the IP. :) Tested on Mac OS X 10.6.3 Show Sample Output
This is sample output - yours may be different.
```
127.0.0.1
```
-2

echo "X-Facebook: from zuckmail ([MTI3LjAuMC4x])" | cut -d \[ -f 2 | cut -d \] -f 1 | openssl base64 -d

IsraelTorres · 2010-05-09 00:46:28 4
Open Finder from the current Terminal location
This is sample output - yours may be different.
-2

open -a Finder <path>

ratonovitch · 2011-07-26 02:07:37 3
Easiest way to navigate to home

SImply type "cd" and press enter Show Sample Output
This is sample output - yours may be different.
```
[home/mario/maven/parrot]
[home/mario/maven/parrot] cd
[mario@localhost ~]
```
-2

cd

kmario23 · 2013-12-17 13:16:10 8
mount a msdos formated floppy disk

-t option tells the system to look for a msdos filesystem The /dev/fd0 is your floppy drive ( This may be different for you check /dev folder to confirm) /mnt/floppy is the point where you want to mount the device to
This is sample output - yours may be different.
-2

mount -t msdos /dev/fd0 /mnt/floppy

eastwind · 2009-12-10 06:46:53 7
Remove Thumbs.db files from folders

Shorter
This is sample output - yours may be different.
-2

rm -fr `find . -name Thumbs.db`

LrdShaper · 2010-08-18 03:27:05 5

repeat a command every X seconds , output show the creation of partition image using fsarchiver, each line show the size of the image. Show Sample Output

-2

while x=0; do foo ; sleep 1 ; done

eastwind · 2012-07-11 13:22:21 4

Run Remote GUI Programs Using SSH Forwarding

Run GUI apps on another machine remotely through SSH. -C is for data compression and -X enables X11 forwarding.
This is sample output - yours may be different.
-2

ssh -C -X user@remotehost gui_command

sharfah · 2009-05-21 17:52:24 7
Outputs a 10-digit random number
This is sample output - yours may be different.
-2

n=$RANDOM$RANDOM$RANDOM; let "n %= 10000000000"; echo $n

alset · 2009-10-15 05:10:00 4
Process each item with multiple commands (in while loop)
This is sample output - yours may be different.
-2

find -maxdepth 1 -type d | while read dir; do echo $dir; echo cmd2; done

techie · 2013-04-29 10:15:13 6
get msn buddy's info
This is sample output - yours may be different.
-2

purple-remote "msn:getinfo?screenname=xxx"

newdongyuwei · 2010-01-13 03:29:32 3
export iPad App list to txt file
This is sample output - yours may be different.
-2

cd "~/Music/iTunes/iTunes Media/Mobile Applications";ls > filepath

miccaman · 2012-05-04 08:52:06 3
I am using a desktop?
This is sample output - yours may be different.
-2

sudo hal-get-property --udi /org/freedesktop/Hal/devices/computer --key 'system.formfactor'

0disse0 · 2012-02-06 19:44:44 3
Get your external IP address

With a lolcat favicon if you access it from your browser Show Sample Output
This is sample output - yours may be different.
```
172.0.0.100
```
-2

curl icanhazip.com

pykler · 2010-06-14 18:47:11 3
count how many cat processes are running
This is sample output - yours may be different.
-2

ps -a |grep cat |wc -l

schmiddim · 2010-09-22 23:57:19 3
Rename all files which contain the sub-string 'foo', replacing it with 'bar'

rename command in my system -Fuduntu running 2.6.38 Linux Kernel- is an ELF 64-bit LSB executable, not a Perl script. man page for rename command shows syntax as "rename from to where" (or something like that), so I am doing just what I have been told... Show Sample Output
This is sample output - yours may be different.
```
$ ls -aF
... many filenames ...
.xsession-errors.old
$ rename old vetust ./.*.*
$ ls -aF
... many filenames ...
.xsession-errors.vetust
```
-2

rename foo bar directory/filename

hexram · 2011-05-04 22:29:11 3
How to execute and encrypted and password-protected bash script?

echo "ls" > script.bash; This is my script, a simple 'ls'. gpg -c script.bash; Here I encrypt and passord-protect my script. This creates file script.bash.gpg. cat script.bash.gpg | gpg -d --no-mdc-warning | bash Here I open file script.bash.gpg, decrypt it and execute it.
This is sample output - yours may be different.
-2

echo "ls" > script.bash; gpg -c script.bash; cat script.bash.gpg | gpg -d --no-mdc-warning | bash

betsubetsu · 2013-03-10 09:34:12 9
Inserting a decimal every third digit

self explanatory see sample output Show Sample Output
This is sample output - yours may be different.
```
# echo "1234435324523443212343241" | perl -lpe'1 while s/^([-+]?\d+)(\d{3})/$1.$2/'
1.234.435.324.523.443.212.343.241
```
-2

perl -lpe'1 while s/^([-+]?\d+)(\d{3})/$1.$2/'

sil · 2009-02-18 21:54:22 6
batch crop images whit imagemagik

Crop several images by imagemagik's convert command. substitute , ,, with pixel value and with a different existent directory.
This is sample output - yours may be different.
-2

for k in *.png; do convert $k -crop <width>x<high>+<cropwidth>+<cropthigh> <newpath>/$k; done

mrehqe · 2011-11-14 17:04:15 7
Convert indentation to tabs
This is sample output - yours may be different.
-2

find . -type f -regex '.*\.$cpp\|h$' -exec bash -c 'unexpand -t 4 --first-only "$0" | sponge "$0"' {} \;

swarzynski · 2022-08-02 10:16:47 594
tail, with specific pattern colored

but you can't see the colors in that sample output :( Show Sample Output
This is sample output - yours may be different.
```
seq 1111 1122|egrep --color=always $\|12
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
```
-2

tail -f file | egrep --color=always $\|PATTERN

sitaram · 2009-10-15 13:08:30 14
Purge frozen messages in Exim

Although Exim will purge frozen (undeliverable) messages over time, the command "exim -Mrm #id#" where #id# is a particular message ID will purge a message immediately. Being lazy, I don't want to type the command for each frozen message, so I wrote the one-liner to do it for me.
This is sample output - yours may be different.
-2

for i in `mailq | awk '$6 ~ /^frozen$/ {print $3}'`; do exim -Mrm $i; done

rjamestaylor · 2010-01-13 21:28:45 3
Unmount locked filesystems.

Will unmount a mount that has already dropped but is locked by a process.
This is sample output - yours may be different.
-2

umount -l /media/foo

nomad · 2009-02-16 02:51:49 58
Purge frozen messages in Exim
This is sample output - yours may be different.
-2

exipick -zi | xargs exim -Mrm

markszabo · 2010-01-13 21:53:43 3
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List all files in current dir and subdirs sorted by size

or $ tree -ifsF --noreport .|sort -n -k2|grep -v '/$' (rows presenting directory names become hidden)

Find usb device in realtime

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

Virtualbox: setup hardware

where - memory 256 assign 256 Mb RAM - acpi on enable ACPI (mandatory if you use Winfog 2000 - ioapic off disable the IO APIC. Not useful if you use one CPU (on virtual machine or a 32 bit operative system). As ACPI, this switch is mandatory for Winbug 2000 - pae on enable the Phisical Address Extension how to use more than 4Gb of RAM on x86 CPU - hwvirtex on enables hardware virtualization extensions for microprocessors that have this feature (which should be also enabled in the BIOS of the motherboard) - nestedpaging on allows part of the processes of memory management hardware are made directly

Fetch the Gateway Ip Address

Better use iproute2 !

Sort output by column

(separator = $IFS)

Install pip with Proxy

Installs pip packages defining a proxy

Set laptop display brightness

Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

python smtp server

This command will start a simple SMTP server listening on port 1025 of localhost. This server simply prints to standard output all email headers and the email body.

Extract audio stream from an AVI file using mencoder

This commands saves the output in the audio directory. The portion ${file/%avi/mp3} uses bash string replacement to replace the avi to mp3 within the ${file} variable.

Screen enable/disable loggin in all windows

The command when added in screenrc enables logging all open windows by using the C-l (control-l key combination) and disable by C-o . The lines need to be added in separate lines .

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