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Localize a Public IP on a specific interface

My first command :) I made this command to log public addresses of a virtual interface who connects random VPN servers around the world. Show Sample Output
This is sample output - yours may be different.
```
date/hour/ipaddress/ip location
```
0

(date "+%d-%m-%Y %H:%M:%S";curl -s --interface lo:1 ifconfig.me| xargs -t geoiplookup 2>&1)|sed -e 's/geoiplookup/IP:/g' -e 's/GeoIP Country Edition/Country/g'|tr -s "\n" " "|sed 'a\ '

guerito · 2013-10-07 15:28:55 6
redirect STDOUT and STDERR to STDOUT and also to a file
This is sample output - yours may be different.
0

command_line 2>&1 | tee -a output_file

esplinter · 2014-04-05 13:02:30 6
My git log alias
This is sample output - yours may be different.
0

git log --graph --decorate --pretty=oneline --abbrev-commit

nicolasmccurdy · 2014-07-16 02:07:23 6
relax with philosophy while taking a dig
This is sample output - yours may be different.
0

for i in `seq 1 100`; do echo "I think therefore I am" | espeak; done

marlboro · 2014-11-08 06:30:11 10
Remove excess noise from a set of mp4 videos.

Full command: for f in input/*; do BN=$(basename "$f"); ffmpeg -i "$f" -vn "temp/$BN.flac"; sox "temp/$BN.flac" "temp/$BN-cleaned.flac" noisered profile 0.3; ffmpeg -i "$f" -vcodec copy -an "temp/$BN-na.mp4"; ffmpeg -i "temp/$BN-na.mp4" -i "temp/$BN-cleaned.flac" "output/$BN"; done This was over the 255 character limit and I didn't feel like deliberately obfuscating it. 1. Create 'input', 'output' and 'temp' directories. 2. Place the files that you want to remove the hiss/static/general noise from in the input directory. 3. Generate a noise reduction profile with sox using 'sox an_input_file.mp4 -n trim x y noiseprof profile', where x and y indicates a range in seconds that only the sound you want to eliminate is present in. 4. Run the command.
This is sample output - yours may be different.
0

for f in input/*; do BN=$(basename "$f"); ffmpeg -i "$f" -vn "temp/$BN.flac"...

samcamwilliams · 2015-03-01 02:48:19 8
count files and directories disk space usage

can be pointed at specific files using: du -ahc /path/to/file counting only directories is faster: du -hc .
This is sample output - yours may be different.
0

du -ahc

lolssl · 2015-10-01 19:38:39 10
replace color in image sequence
This is sample output - yours may be different.
0

mogrify -path ../png_white/ -fuzz 3.5% -fill white -opaque "#50566b" *.png

ceddi · 2016-10-17 20:01:00 16

Run a job in the background and prefix it's output with some string. This is particularly useful if you are running inside a docker container in a startup script (sue me, I'll run two jobs in a docker container if I want to) and you can run something like: /usr/sbin/nginx 2>&1 | awk '{print "[NGINX] " $0}' & /opt/jws-3.1/tomcat8/bin/catalina.sh run 2>&1 | awk '{print "[TOMCAT] " $0}' & while true; do ; done it can also be combined with tee to create a file log as well as a stdout log, for example if the script above where a script called "/bin/start-container.sh" then you could run /bin/start-container.sh | tee /var/log/containerlogs Show Sample Output

nginx 2>&1 | awk '{print "[NGINX] " $0}' &

hvindin · 2017-04-25 22:18:38 20

kill the first docker container in docker ps

Useful when developing and you donut usually have other docker commands running Show Sample Output
This is sample output - yours may be different.
```
 2018-05-24 15:06:10 ? |ruby-2.4.1| Jim-Park-MacBook-Pro in ~/workspace/example
±  |master ?| ? docker kill $(docker ps -q)
abc123456789
```
0

docker kill $(docker ps -q)

jim80net · 2018-05-24 22:11:06 206
find&grep all in once

calls grep on all non-binary files returned by find on its current working directory Show Sample Output
This is sample output - yours may be different.
```
./Main.java://	public static void main(String[] args) throws IOException
```
-1

#!/bin/bash find | grep -P -v "(class)|(zip)|(png)|(gz)|(gif)|(jpeg)|(jpg)" | xargs -I @ grep -H $1 @

kirdie · 2011-10-14 13:28:49 4
Terminate script or shell if not launched as root

This example code is intended to be used as a root permissions check in a script. It makes use of the $EUID (effective user ID) environment variable which is fully su- and sudo-safe.
This is sample output - yours may be different.
-1

if [[ $EUID -ne 0 ]]; then echo 'Root permissions required! Exiting.'; exit; fi

lordtoran · 2011-11-19 23:06:52 8
Spotlight Server Disabled
This is sample output - yours may be different.
-1

cd /System/Library/LaunchDaemons; sudo launchctl load -w com.apple.metadata.mds.plist

evandrix · 2012-05-16 15:42:10 4
umount --rbind mount with submounts

set CDIR for it to work right..
This is sample output - yours may be different.
-1

for i in `cat /proc/mounts | awk '{print $2}' | grep ${CDIR} |sort -r` ; do umount $i; done

mordjah · 2013-05-07 23:46:27 5
Tar - Compress by excluding folders

Tar - Compress by excluding folders Show Sample Output
This is sample output - yours may be different.
```
Tar - Compress by excluding folders
```
-1

tar -cvf /path/dir.tar /path/dir* --exclude "/path/dir/name" --exclude "/path/dir/opt"

sandeepverma · 2009-12-15 09:48:41 3
Get iPhone OS firmware URL (.ipsw)

Usage: get-ipsw device-name generation-string firmware-version For example: get-ipsw iPod 2,1 4.0 Different generation strings: iPhone 3G: iPhone 1,2 iPhone 3GS: iPhone 2,1 iPod touch 2G: iPod 2,1 iPod touch 3G: iPod 3,1 This can be used with idevicerestore (I haven't tried it though). http://github.com/posixninja/idevicerestore Based on: http://www.tuaw.com/2010/06/21/ios-4-0-firmware-release-expected-momentarily-quick-terminal-ti/ Show Sample Output
This is sample output - yours may be different.
```
http://appldnld.apple.com.edgesuite.net/content.info.apple.com/iPhone4/061-7435.20100621.tr49t/iPod2,1_4.0_8A293_Restore.ipsw
```
-1

get-ipsw(){ curl -s -L http://phobos.apple.com/version | sed -rn "s|[\t ]*<string>(http://appldnld\.apple\.com\.edgesuite\.net/content\.info\.apple\.com/iPhone[0-9]?/[^/]*/$1$2_$3_[A-Z0-9a-z]*_Restore\.ipsw)</string>|\1|p" | uniq; }

matthewbauer · 2010-06-22 02:34:15 5

Get a file's type and metadata

Some shell newbies don't know this very handy file management related command so I decided to include it here. You need to have the "file" package installed. Show Sample Output

-1

file <filename>

lordtoran · 2011-11-19 23:39:29 3

list each file/directory size in a directory
This is sample output - yours may be different.
-1

ls | xargs -I{} du -sh {}

kenshin54 · 2013-07-28 04:18:25 8
Push current task to background (paused) and resume it.

Saves opening another console terminal (eg. CTRL+ALT+F[n]) or opening another remote terminal. Ctrl+Z pauses the current task and pushed it to the background, leaving you with a command prompt for those "Oh crap I forgot to change xyz before I ran that and it'll take forever if I Ctrl+C and start again..." situations. Typing 'fg' (shorthand for foreground, that's how I remember it) will resume the paused task. Show Sample Output
This is sample output - yours may be different.
```
$ dd if=/dev/zero of=test.file
^Z
[1]+  Stopped                 dd if=/dev/zero of=test.file
$ echo "I needed to do this."
I needed to do this.
$ fg
dd if=/dev/zero of=test.file
```
-1

<CTRL+Z>; fg

kbrotheridge · 2014-04-06 14:21:08 7
Use ping to test if a server is up

Bash scrip to test if a server is up, you can use this before wget'ing a file to make sure a blank one isn't downloaded.
This is sample output - yours may be different.
-1

if [ "$(ping -q -c1 google.com)" ];then wget -mnd -q http://www.google.com/intl/en_ALL/images/logo.gif ;fi

alf · 2010-03-23 04:15:03 10
Convert wma to wav
This is sample output - yours may be different.
-1

for i in *.wma; do mplayer -vo null -vc dummy -af resample=44100 -ao pcm:waveheader:file="${i%.wma}.wav" "$i" ; done

schef · 2011-01-18 14:41:17 3
Show seconds since modified of newest modified file in directory
This is sample output - yours may be different.
-1

echo $(( $( date +%s ) - $( stat -c %Y * | sort -nr | head -n 1 ) ))

depesz · 2011-05-12 14:29:45 3
lsof - cleaned up for just open listening ports, the process, and the owner of the process
This is sample output - yours may be different.
-1

alias oports="echo -e "User:\tCommand:\tPort:\n----------------------------" && lsof -i 4 -P -n | awk '/LISTEN/ {print $3, $1, $9}' | sed 's/ [a-z0-9\.\*]*:/ /' | sort -u -k 3 -n | xargs printf '%-10s %-10s %-10s\n'"

rthemocap · 2011-08-04 16:39:04 4
Get video information with ffmpeg

mp4box is great when working with mp4s
This is sample output - yours may be different.
-1

mp4box -info video.mp4

alienresident · 2013-01-18 14:43:29 5
Binary digits Matrix effect
This is sample output - yours may be different.
-1

perl -e 'use Term::ANSIColor;$|++; while (1) { print color("green")," " x (rand(35) + 1), int(rand(2)), color("reset") }'

mvrpl · 2017-04-26 14:05:48 20
bash function to check for something every 5 seconds

Every seconds do Show Sample Output
This is sample output - yours may be different.
```
Every 10,0s: ls /tmp                           Fri Sep  4 19:19:11 2009
...
<list of files>
```
-1

watch -n <seconds> <command>

aonick · 2009-09-04 15:19:42 3
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a find and replace within text-based files

using find's exec option instead of a for loop and using sed's -i option for inplace replacement. no need to do the file swap.

Write comments to your history.

A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

Remove Backup Files

Remove all text backup files.

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Trick find -exec option to execute alias

An alias cannot be executed as command in a find -exec line. This form will trick the command line and let you do the job.

Resolution of a image

You can use the -format switch to get the size of the image. Replace "logo:" with your image.

Find the package that installed a command

trace http requests with tshark

trace http requests on the specified interface. uses the amazing tshark tool (http://www.wireshark.org/docs/man-pages/tshark.html)

Batch rename extension of all files in a folder, in the example from .txt to .md

Same thing using bash built-in features instead of a sub-shell.

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"

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