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Make a dedicated folder for each zip file

{f%*.zip} strips off the extension from zip filenames
This is sample output - yours may be different.
0

for f in *.zip; do unzip -d "${f%*.zip}" "$f"; done

praton · 2019-02-20 18:12:06 0
Create multiple subfolders in one command.
This is sample output - yours may be different.
0

mkdir -p /path/folder{1..4}

rocteur · 2019-02-15 19:47:41 0
Create multiple subfolders in one command.

Instead of typing separate commands to create various subfolders, we can create multiple subfolders by listing them between brackets and separated by commas. Show Sample Output
This is sample output - yours may be different.
```
/path/folder1
/path/folder2
/path/folder3
/path/folder4
```
0

mkdir -p /path/{folder1,folder2,folder3,folder4}

vim99 · 2019-02-14 23:36:04 0
Show a prettified list of nearby wireless APs
This is sample output - yours may be different.
1

nmcli device wifi list

lordtoran · 2019-02-13 03:21:51 0
Serve current directory tree at http://$HOSTNAME:8000/

Http server on port other than 8000 Show Sample Output
This is sample output - yours may be different.
```
Serving HTTP on 0.0.0.0 port 8080 ...
```
0

python -m SimpleHTTPServer 8080

kharthigeyan · 2019-02-12 14:53:57 0
Print compile time in seconds package by package (Gentoo Distros)

real 0m0.014s user 0m0.001s sys 0m0.014s
This is sample output - yours may be different.
0

time <command>

aysadk · 2019-02-12 13:31:49 0
route add default gateway

add route default gateway on shell
This is sample output - yours may be different.
0

route add default gw 192.168.10.1 //OR// ip route add default via 192.168.10.1 dev eth0 //OR// ip route add default via 192.168.10.1

aysadk · 2019-02-12 13:23:58 0
Find German synonyms using OpenThesaurus

A function for retrieving and displaying a list of synonyms for a German word or phrase. Show Sample Output
This is sample output - yours may be different.
```
$ desyno Läuterung
Aufbesserung, Aufwertung, Besserung, Läuterung, Melioration, Optimierung, Verbesserung, Verfeinerung, Vervollkommnung, Katharsis, Klärung, Läuterung, Reinigung
$ desyno linux
GNU/Linux, Linux
```
0

desyno(){ wget -q -O- https://www.openthesaurus.de/synonyme/search\?q\="$*"\&format\=text/xml | sed 's/>/>\n/g' | grep "<term term=" | cut -d \' -f 2 | paste -s -d , | sed 's/,/, /g' | fold -s -w $(tput cols); }

lordtoran · 2019-02-09 05:06:42 0
Generate SSH public key from the private key
This is sample output - yours may be different.
0

ssh-keygen -y -f privatekey.pem > publickey.pem

elio · 2019-02-08 09:00:44 0
Start a game on the discrete GPU (hybrid graphics)

On laptops featuring hybrid graphics and using the free X drivers, the DRI_PRIME variable indicates which GPU to run on. This alias allows to utilize the faster discrete GPU without installing proprietary drivers. Show Sample Output
This is sample output - yours may be different.
```
$ glxinfo | grep "OpenGL renderer"
OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 5500 (Broadwell GT2)
$ game glxinfo | grep "OpenGL renderer"
OpenGL renderer string: AMD HAINAN (DRM 2.50.0, 4.18.0-14-generic, LLVM 7.0.0)
```
1

alias game='DRI_PRIME=1'

lordtoran · 2019-02-08 04:26:34 0
IBM AIX: Extract a .tar.gz archive in one shot
This is sample output - yours may be different.
0

gunzip -c file.tar.gz | tar -xvf -

keenoar · 2019-02-07 21:23:35 0
Use CreationDate metadata on .mov files to rename and modify the created/modify file dates on Mac
This is sample output - yours may be different.
1

exiftool '-MDItemFSCreationDate<CreationDate' '-FileModifyDate<CreationDate' '-filename<CreationDate' -d %Y-%m-%d_%H-%M-%S%%+c.%%le . -ext mov

ekallevig · 2019-02-07 02:38:36 0
Shell pocket calculator (pure sh)

This shell calculator uses POSIX features only and is therefore portable. By default the number of significant figures is limited to 8 with trailing zeros stripped, resembling the display of a basic pocket calculator. You might want to increase this to 12 to emulate a scientific calculator. Show Sample Output
This is sample output - yours may be different.
```
$ calc "x = 2 + 2; ++x"
5
$ calc "10 / 16"
0.625
$ calc "sqrt(2)"
1.4142136
$ calc "(1.2 + 3.4) ^ 56"
1.3014832e+37
```
0

calc(){ printf "%.8g\n" $(printf "%s\n" "$*" | bc -l); }

lordtoran · 2019-02-06 23:32:35 0
find sparse files

Prints the path/filename and sparseness of any sparse files (files that use less actual space than their total size because the filesystem treats large blocks of 00 bytes efficiently). Uses a Tasker-esque field separator of more than one character to ensure uniqueness. Show Sample Output
This is sample output - yours may be different.
```
$ find /var/log -type f -printf "%S=:=%p\n" 2>/dev/null | gawk -F'=:=' '{if ($1 < 1.0) print $1,$2}'
7.88593e-08 /var/log/with space
1.11717e-07 /var/log/lastlog
```
0

find -type f -printf "%S=:=%p\n" 2>/dev/null | gawk -F'=:=' '{if ($1 < 1.0) print $1,$2}'

TommyTwoPuds · 2019-02-06 14:12:32 0
Check whether IPv6 is enabled

Checks whether IPv6 is enabled system-wide by reading from procfs. Show Sample Output
This is sample output - yours may be different.
```
IPv6 is enabled
```
1

printf "IPv6 is "; [ $(cat /proc/sys/net/ipv6/conf/all/disable_ipv6) -eq 0 ] && printf "enabled\n" || printf "disabled\n"

lordtoran · 2019-02-05 21:01:32 0
Print umask as letters (e.g. `rwxr-xr-x`) instead of number (e.g. `0022`)

Install with `npm install unix-permissions`. https://github.com/ehmicky/unix-permissions Unix file permissions can take many shapes: symbolic (`ug+rw`), octal (`660`) or a list of characters (`drw-rw----`). `unix-permissions` enables using any of these (instead of being limited to a single one) with any CLI command. Show Sample Output
This is sample output - yours may be different.
```
rwxr-xr-x
```
0

unix-permissions convert.stat $(unix-permissions invert $(umask))

ehmicky · 2019-02-05 14:06:08 0
get full git commit history of single file
This is sample output - yours may be different.
0

git log -p --name-only --follow <file>

jgleeson · 2019-02-04 15:21:17 0
Capture SMTP / POP3 Email
This is sample output - yours may be different.
3

sudo tcpdump -nn -l port 25 | grep -i 'MAIL FROM\|RCPT TO'

wuziduzi · 2019-02-03 05:15:46 0
Extract HTTP Passwords in POST Requests
This is sample output - yours may be different.
1

sudo tcpdump -s 0 -A -n -l | egrep -i "POST /|pwd=|passwd=|password=|Host:"

wuziduzi · 2019-02-03 05:15:28 0
Capture FTP Credentials and Commands
This is sample output - yours may be different.
1

sudo tcpdump -nn -v port ftp or ftp-data

wuziduzi · 2019-02-03 05:14:56 0
Capture all plaintext passwords
This is sample output - yours may be different.
3

sudo tcpdump port http or port ftp or port smtp or port imap or port pop3 or port telnet -l -A | egrep -i -B5 'pass=|pwd=|log=|login=|user=|username=|pw=|passw=|passwd=|password=|pass:|user:|username:|password:|login:|pass |user '

wuziduzi · 2019-02-03 05:13:58 0
Display live hosts on the network

Displays live hosts on the same network as the local machine with their hostnames and IP addresses. This command is IPv6 and multiple network adapter safe and does not rely on awk or sed, however it requires the "nmap" package installed. Might not work on OSX. Example alias for shell startup file: alias livehosts='nmap -sP "$(ip -4 -o route get 1 | cut -d " " -f 7)"/24 | grep report | cut -d " " -f 5-' Show Sample Output
This is sample output - yours may be different.
```
gateway.url (192.168.2.1)
host1.mynetwork (192.168.2.123)
host2.mynetwork (192.168.2.140)
192.168.2.147
host3.mynetwork (192.168.2.148)
192.168.2.187
192.168.2.190
host4.mynetwork (192.168.2.194)
```
-2

nmap -sP "$(ip -4 -o route get 1 | cut -d ' ' -f 7)"/24 | grep report | cut -d ' ' -f 5-

lordtoran · 2019-02-01 03:52:02 0
List files size sorted and print total size in a human readable format without sort, awk and other commands.
This is sample output - yours may be different.
0

ls -sSh /path | head

wuziduzi · 2019-01-25 15:10:05 0
List the size (in human readable form) of all sub folders from the current location

-s summary -h human slightly different : will display side by side the sizes of individual files and of directories in current dir will not display total size of './'
This is sample output - yours may be different.
0

du -sh *

legec · 2019-01-25 08:09:35 0
Make M-r run the contents of the Readline line buffer and replace it with the result in Bash

bind -x was added in Bash 4.0 so this does not work with Bash 3.2 which comes with macOS.
This is sample output - yours may be different.
0

bind -x '"\er":READLINE_LINE=$(eval "$READLINE_LINE");READLINE_POINT=${#READLINE_LINE}'

lri · 2019-01-25 02:35:47 0
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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.

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Unix commandline history substitution like ^foo^bar BUT for multiple replacements

#1 You invoked a command chain. #2 You globaly replace the scriptnames and execute them direct #3 The new executed command chain [# ^foo^bar] would only replace the firts match [foo] with [bar].

floating point operations in shell scripts

-l auto-selects many more digits (but you can round/truncate in your head, right) plus it loads a few math functions like sin().

Copy file content to X clipboard

(only when vim has been compiled with +clipboard)

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"

Get MX records for a domain

command is shorter, output unnecessary longer

Do some learning...

Just realized how needless the 'ls' has been... This version is also multilingual, since there is no need to grep for a special key word ("nothing"/"nichts"/"rien"/"nada"...). And it makes use of all the available horizontal space.

Inverted cowsay

It's quite fun to invert text using "flip.pl" (ref: http://ubuntuforums.org/showthread.php?t=2078323 ). Slightly more challenging is to flip a whole "cowsay". :-)

Rescan partitions on a SCSI device

Used this after cloning a disk with dd to make the newly written partitions show up in /dev/

Create thumbnails and a HTML page for listing them (with links to sources)

The input images are assume to have the "JPG" extension. Mogrify will overwrite any gif images with the same name! Will not work with names with spaces.

Remove all unused kernels with apt-get

TIMTOWTDI

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