ffmpeg: Extract audio to mp3 from multiple mp4 video files

for i in *.mp4; do ffmpeg -i "$i" -q:a 0 -map a "$(basename "$i" .mp4)".mp3 ; done

Linux: Download audo only from twitch (including live stream)

Show available video formats:
youtube-dl --list-formats twitch_url_to_video
Download only audio:
youtube-dl -f audio_only twitch_url_to_video

Manjaro: Remove steam and microsoft office

sudo pacman -Rd steam-devices steam-manjaro ms-office-online

Cmake: compile using clang instead of gcc

export CC=/usr/bin/clang
export CXX=/usr/bin/clang++
cmake ..

ssh config

Example
# contents of $HOME/.ssh/config
Host dev
HostName dev.example.com
Port 22000
User fooey

From: https://nerderati.com/2011/03/17/simplify-your-life-with-an-ssh-config-file/

vncviewer: Increase compression levels and reduce bandwitch

vncviewer -QualityLevel=7 -FullColor=0 -LowColorLevel=2 -CompressLevel=3 :3

Chromium: disable restore pages script

i3: add rofi key $mod+d

Edit .config/i3/config:
bindsym $mod+d exec "rofi -combi-modi window,drun -show combi"

Manjaro: CUPS stopped working after upgrade to samba 4.8

This worked: https://bbs.archlinux.org/viewtopic.php?pid=1784907#p1784907

Search for a string in txt file in all sub-directories

find dir/ -name *.txt -type f -exec grep -H 'string' {} +