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Spoof your wget referring url
This is sample output - yours may be different.
0

H="--header"; wget $H="Accept-Language: en-us,en;q=0.5" $H="Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8" $H="Connection: keep-alive" -U "Mozilla/5.0 (Windows NT 5.1; rv:10.0.2) Gecko/20100101 Firefox/10.0.2" --referer=urlhere

theabarnes · 2014-10-17 04:22:07 8
Convert JSON to YAML (unicode safe)
This is sample output - yours may be different.
0

json_xs -t yaml < foo.json > foo.yaml

chrapek · 2015-01-29 13:48:34 9
Create OS X install USB via one step CLI

If you've upgraded to OS X 10.10.x the OS installer should be on your system, otherwise its a free download (~ 5 GB). Added bonus, the above command does not require the USB pre-formatted. Show Sample Output
This is sample output - yours may be different.
```
Erasing Disk: 0%... 10%... 20%... 30%...100%...
Copying installer files to disk...
Copy complete.
Making disk bootable...
Copying boot files...
Copy complete.
Done.
```
0

sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ Yosemite.app/ --nointeraction

justinf · 2015-05-24 08:03:41 12
Write random data to a disk, quickly

Due to @tremby, here: http://unix.stackexchange.com/a/172088/58343. I'm looking for a way to parallelize openssl and feed that to dd since openssl is the bottleneck on my machine: http://unix.stackexchange.com/questions/253466/parallelize-openssl-as-input-to-dd
This is sample output - yours may be different.
0

openssl enc -aes-256-ctr -pass pass:"$(dd if=/dev/urandom bs=128 count=1 2>/dev/null | base64)" -nosalt </dev/zero | pv --progress --eta --rate --bytes --size 8000632782848 | dd of=/dev/md0 bs=2M

diagon · 2016-01-05 19:36:03 20
Delete all Vagrant boxes

Combs through your home directory and destroys all Vagrant boxes.
This is sample output - yours may be different.
0

find $HOME -type d -name .vagrant | xargs -i% bash -c "pushd %; cd ..;vagrant destroy -f; popd"

gtirloni · 2016-10-06 17:02:20 17
Find latest modified log
This is sample output - yours may be different.
0

find . -name '*.log' | xargs ls -hlt > /tmp/logs.txt && vi /tmp/logs.txt

zluyuer · 2017-07-07 05:13:51 20
Toggle the Touchpad on or off
This is sample output - yours may be different.
0

tp=$(synclient -l | grep TouchpadOff | awk '{ print $3 }') && tp=$((tp==0)) && synclient TouchpadOff=$tp

jny · 2018-10-09 07:42:32 376
replace @ symbol with new line character, to get new line character press Ctrl+v+enter --> ^M

replace @ symbol with new line character, to get new line character press Ctrl+v+enter --> ^M
This is sample output - yours may be different.
0

%s/@/^v[M]/g

xraj · 2009-09-17 11:47:24 4
Show a script or config file without comments
This is sample output - yours may be different.
0

egrep -v "^[[:blank:]]*($|#|//|/\*| \*|\*/)" somefile

sdadh01 · 2009-11-10 18:49:19 5
View a random xkcd comic

Only need to install Image Magick package. Display a xkcd comic with its title and save it in /tmp directory If you prefer to view the newest xkcd, use this command: wget -q http://xkcd.com/ -O-| sed -n '/<img src="http:\/\/imgs.xkcd.com\/comics/{s/.*$http:.*$" t.*/\1/;p}' | awk '{system ("wget -q " $1 " -O- | display -title $(basename " $1") -write /tmp/$(basename " $1")");}'
This is sample output - yours may be different.
0

wget -q http://dynamic.xkcd.com/comic/random/ -O-| sed -n '/<img src="http:\/\/imgs.xkcd.com\/comics/{s/.*$http:.*$" t.*/\1/;p}' | awk '{system ("wget -q " $1 " -O- | display -title $(basename " $1") -write /tmp/$(basename " $1")");}'

laugg · 2009-12-09 13:41:25 7
Show the command line of a process that use a specific port (ubuntu)

A way not so simple but functional for print the command for the process that's listening a specific port. I got the pid from lsof because I think it's more portable but can be used netstat netstat -tlnp Show Sample Output
This is sample output - yours may be different.
```
java -Dcom.sun.management.jmxremote -Xmx1024m -XX:MaxPermSize=300m -server -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8885 -jar /oc4j/j2ee/home/oc4j.jar 
```
0

port=8888;pid=$(lsof -Pan -i tcp -i udp | grep ":$port"|tr -s " " | cut -d" " -f2); ps -Afe|grep "$pid"|grep --invert-match grep | sed "s/^$[^ ]*[ ]*$\{7\}$.*$$/\2/g"

glaudiston · 2010-01-11 17:49:22 8
Status of Snow Armageddon in Washington DC Metro from the command line...

The Washington DC Metro area is not accustomed to getting large snow storms... http://snowpocalypsedc.com/
This is sample output - yours may be different.
0

/usr/bin/links --source http://weather.noaa.gov/pub/data/forecasts/zone/md/mdz009.txt

SuperFly · 2010-02-05 17:44:45 3
List a phone's filesystem with bitpim

This will list your phone's filesystem with bitpim. (works on many LG, Samsung, and Sanyo) See http://www.bitpim.org/help/phones-featuressupported.htm for full list.
This is sample output - yours may be different.
0

bitpim -p $PHONE_PORT ls

matthewbauer · 2010-04-09 02:20:53 10
shutdown pc in a 4 hours

((60 * 4)) will be turned into 240 by bash before being input to the shutdown command, replace the 4 with whatever number of hours you want, let bash do the math.
This is sample output - yours may be different.
0

shutdown -h $((60 * 4))

retrodanny · 2011-05-02 07:10:10 3
batch download jpgs which are in sequence
This is sample output - yours may be different.
0

curl -O http://www.site.com/img/image[001-175].jpg

kev · 2011-11-09 10:19:24 4
Show all archives.

That command make the same that "ls -a", but just typping "la". Tested in bash.
This is sample output - yours may be different.
0

la

rock_neurotiko · 2011-12-18 15:48:03 3
open a screenshot of a remote desktop via ssh

More stealthy ffmpeg method. The imagemagick 'import' method causes a system beep.
This is sample output - yours may be different.
0

ssh user@host "ffmpeg -f x11grab -s 1920x1080 -i :0 -r 1 -t 1 -f mjpeg -" | display

buhrietoe · 2012-05-01 04:45:15 3
Flush DNS in Mac OS X
This is sample output - yours may be different.
0

dscacheutil ?flushcache

edshadi · 2012-07-04 17:04:52 3
SoftHangup --Request a hangup on a given channel - in Asterisk 1.6.2:

If a call get hanged , one can disconnect the call using the above command i.e "soft hangup . The Zap/1-1 is the name of the Channel , you wish to disconnect. There may be many channels, but you need to pick the channel name of hanged call only ...
This is sample output - yours may be different.
0

soft hangup Zap/1-1

coolsanjiv · 2012-10-31 06:50:18 3
Suspend to RAM with KDE 4

%qdbus org.freedesktop.PowerManagement /org/kde/Solid/PowerManagement suspendToRam Service 'org.freedesktop.PowerManagement' does not exist.
This is sample output - yours may be different.
0

dbus-send --system --print-reply --dest="org.freedesktop.UPower" /org/freedesktop/UPower org.freedesktop.UPower.Suspend

unixmonkey45062 · 2013-01-03 21:35:19 6
launch bash without using any letters

Starts a new shell (in bash/sh, it starts bash/sh). 'man bash' explains: "If arguments remain after option processing, and neither the -c nor the -s option has been supplied, the first argument is assumed to be the name of a file containing shell commands. If bash is invoked in this fashion, $0 is set to the name of the file, and the positional parameters are set to the remaining arguments."
This is sample output - yours may be different.
0

$0

fhtagn · 2013-03-05 22:57:14 4
Display terminal command history with date

If the HISTTIMEFORMAT is set, the time stamp information associated with each history entry is written to the history file, marked with the history comment character. Show Sample Output
This is sample output - yours may be different.
```
    2  19/09/13 11:21:02 ./adb kill-server
    3  19/09/13 11:21:02 ./adb start-server
    4  19/09/13 11:21:02 ./adb 
    5  19/09/13 11:21:02 ./adb shell
    6  19/09/13 11:21:02 ./adb shell
    7  19/09/13 11:21:02 cd /Users/weng/Software/android-sdk-macosx/platform-tools/
    8  19/09/13 11:21:02 ./adb kill-server
    9  19/09/13 11:21:02 ./adb start-server
   10  19/09/13 11:21:02 ping 192.168.1.10
```
0

echo 'export HISTTIMEFORMAT="%d/%m/%y %T "' >> ~/.bash_profile

99RedBalloons · 2013-09-19 03:25:14 13
truncate deleted files from lsof

Be careful, first run: lsof | grep -i deleted | grep REG | grep -v txt Then, give it the boot!
This is sample output - yours may be different.
0

lsof | grep -i deleted | grep REG | grep -v txt | ruby -r 'pp' -e 'STDIN.each do |v| a = v.split(/ +/); puts `:> /proc/#{a[1]}/fd/#{a[3].chop}`; end'

jim80net · 2014-03-11 06:02:09 7
Show an alphabetized list of all mcollective nodes
This is sample output - yours may be different.
0

mco ping | head -n -4 | awk '{print $1}' | sort

mrwulf · 2014-06-24 18:20:16 7
Sync local machine date to remote machine over ssh

This will take the local machines date and set it on the remote machine. This really only works right if you have already swapped an ssh key. Show Sample Output
This is sample output - yours may be different.
```
Fri Jan 30 09:32:13 EST 2015
```
0

ssh root@host.domain.tld "date -s '"$(date)"'";

MelonSmasher · 2015-01-30 14:40:33 10
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Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Execute a command, convert output to .png file, upload file to imgur.com, then returning the address of the .png.

My key is the anonymous one, is good for 50 post an hour with a maximun number of uploads a day, probably will run out, if that happend you can get a free key at the site.

Print Memory Utilization Percentage For a specific process and it's children

Change the name of the process and what is echoed to suit your needs. The brackets around the h in the grep statement cause grep to skip over "grep httpd", it is the equivalent of grep -v grep although more elegant.

Listing directory content of a directory with a lot of entries

Ever wanted to get the directory content with 'ls' or 'find' and had to wait minutes until something was printed? Perl to the rescue. The one-liner above(redirected to a file) took less than five seconds to run in a directory with more man 2 million files. One can adapt it to e.g. delete files that match a certain pattern.

Stop Flash from tracking everything you do.

Brute force way to block all LSO cookies on a Linux system with the non-free Flash browser plugin. Works just fine for my needs. Enjoy.

Have netcat listening on your ports and use telnet to test connection

This will start a netcat process listening on port 666. If you are able connect to your your server, netcat will receive the data being sent and spit it out to the screen (it may look like random garbage, so you might want to redirect it to a file).

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"

Show which programs are listening on TCP ports

Alternative: $ ss -tlpn

Shortcut to find files with ease.

It looks for files that contains the given word as parameter. * case insensitive * matches files containing the given word.

Use md5sum to check your music and movie files. Also use diff.

This is a beginning script. You can create a file with > filename. You can also use diff to compare output run at different times to verify no change in your files. I apologize in advance if this is too simple. For some it should be a start.

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