Linux

Hotkeys

• super + f = fullscreen
• super + 1 = open 1st favourite

The A-Z of Linux Commands

###

• ”

  ” is pipe

• ”;” run multiple commands sequentially
• “&” run multiple commands parallel

A

B

• bash help bash_help

C

• cat
• conky [link]{https://linuxconfig.org/system-monitoring-on-ubuntu-18-04-linux-with-conky}

example

$ sudo lshw -class cpu

• crontab

example - This will load .sh at 11 00 am, daily.

$ crontab -e
$ 00 11 * * * ~/Downloads/_vital_git_backup/vital_git_backup.sh

excellent examples

D

• dd

example

$ sudo dd if=/dev/sdb of=~/SDCardBackup.img

• df -h [link]{https://thepihut.com/blogs/raspberry-pi-tutorials/17789160-backing-up-and-restoring-your-raspberry-pis-sd-card}
• dcfldd [link]{http://www.aoakley.com/articles/2015-10-09-resizing-sd-images.php}

example

$ sudo dcfldd if=/dev/sde of=imagename.img

H

• htop
• history

example:

$ history | more
1  service network restart
2  exit
3  id
4  cat /etc/redhat-release

$ !4
cat /etc/redhat-release
Fedora release 9 (Sulphur)

F

• ffmpeg

example:

$ ffmpeg -i can_001.mkv -codec copy can_001.mp4
$ ffmpeg -i can_001.mkv -ss 00:10 -to 01:50 -c:v copy -c:a copy can_001_trim.mkv

• find

example:

$ find ./ -type f -exec grep -Hn "YourContent" {} \;

G

• grep

L

• lsblk
• lsb_release -a

N

• neofetch
• nvidia-smi

S

• sleep 10

U

• uptime

W

• wait &! wait for previous command to finish

X

• xkill
• xrandr –output HDMI-0 –brightness 1.0

Notes

Ubuntu

• if can’t boot CTRL+ALT+F1 to go to tty, CTRL+ALT+F7 to return
• if forget to run as sudo, just type $ sudo !!
• store others’ code/libs/etc in /usr/local/src
• store desktop links in /usr/share/applications

VM

• sudo mount -t fuse.vmhgfs-fuse .host:/ /mnt/hgfs -o allow_other

Python

Python problems export PYTHONPATH=$PYTHONPATH:/path/to/main.py