cle

Command Line Essentials

cmatrix

Having fun on the console, rainbow matrix screensaver

cmatrix -abr

convert

Create animated gif from multiple images and loop forever

convert -loop 0 -delay 200 1.png 2.png 3.png 4.png 5.png 6.png 7.png 8.png output.gif

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ctop - top-like interface for docker container

ctop -a

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curl

Receive public IP address

curl ifconfig.me/ip

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diskutil

Erasing sd card and formattig with FAT32

sudo diskutil eraseDisk FAT32 SDCARD MBRFormat /dev/disk2

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docker

Build image from Dockerfile with tagging

docker build -f Dockerfile -t flow1985/openttd-jgr .

Run command inside container

docker exec -it b9edef51a553 /bin/bash

Show logs from container

docker logs -f b9e

Run container with port forwarding and volume mounting

docker run -d -p 8080:8080 -p 8081:8081 -v /Users/florianwallburg/Documents/MyProject:/usr/src/app sapui5-ide-docker:1.69.0-sdk

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dwebp

Decode webp format

dwebp input.webp -o output.png

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ffmpeg

Convert video to x264 and copying video and audio

ffmpeg -i file.mkv -c:v libx264 -c:a copy -c:s copy -n out.mkv

Concat videos from list.txt to one single file

ffmpeg -f concat -i list.txt -c copy 20250510.MOV

Concat videos from list.txt to one single file w/o audio

ffmpeg -f concat -i list.txt -c copy -an 20250510.MOV

Concat videos from list.txt to one single file w/o audio and send it to background processing

nohup ffmpeg  -nostdin -f concat -i list.txt -c copy -an 20250510.MOV &

Speed up video by 10 times

ffmpeg -i 20240510.MOV -an -vf "setpts=PTS/10" 20240510_10x.mp4

Speed up video by 10 times and resize to 640x480

ffmpeg -i 20240510.MOV  -vf "setpts=PTS/10, scale=640:480" -an 20240510_10x.mp4

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find

Copy only files from directory and subdirectories to current folder

find . -type f -exec cp {} . \;

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gifify

Creates animated gif from image files

gifify -p 800:577 -r 1@1 -o my-gif *.png

git

Presents the list of commits with hash one per line

git log --pretty=oneline

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history

Grep a certain command from history

history | grep docker

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homebrew

Install brew formula

brew install gifify

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ncdu - NCurses disk usage

Analyzing disk usage

ncdu

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nmap - the Network Mapper

Scan a network and find out which servers and devices are up and running

nmap -sP 192.168.1.0/24

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npm - node.js package manager

Install without dependencies in package.json

npm install --production

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python

Serve current directory tree at http://$hostname:8000

python -m SimpleHTTPServer

sed - stream editor

Search and replace text inside a file

Remove specific line from file specified by line number

sed -i '76d' src/rev.cpp.in

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sox - audio interface

Merge all *.mp3 after one another into one single .mp3 file while using bitrate 192kb/s

sox 0*.mp3 -C 192.01 -c 2 -S "Benjamin Blümchen - 026 - Als Bademeister.mp3"

Take the first 120 minutes from a audio file

sox jAOW8-u1Xh8.mp3 output.mp3 trim 0 120:00

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sudo -

Execute previous command with sudo

sudo !!

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tar with gzip - tape archiver :) and gunzip

Create .tar.gz with highest compression

env GZIP=-9 tar cvzf file.tar.gz /path/to/directory

List the content of a .tar.gz file

tar -ztvf file.tar.gz

tmux - terminal multiplexer

tmux - terminal multiplexer

Create new session

tmux
tmux new

Resume old session (attach)

tmux a

Close current session (detach)

Prefix + d

yt-dlp - youtube download client for command line

Show all donwload formats

yt-dlp -F https://www.youtube.com/watch\?v\=1__CAdTJ5JU

Download audio source from video as mp3

yt-dlp -f 140 -x --audio-format mp3  https://www.youtube.com/watch\?v\=1__CAdTJ5JU