Linux Command Handbook

linux_handbook.txt

###### FIND ####
> Execute a command on every subfolder

find -D exec -maxdepth 1 -type d -name "my/directory" -print -exec COMMAND \;


####################### SYSTEMD #######################

> Reload service configuration

sudo systemctl daemon-reload

> Display and follow logs

sudo journalctl -u <service> -f

####################### DATE/TIME #######################

> Reconfigure Time Zone

sudo dpkg-reconfigure tzdata

########################## GIT ##########################

> Show git tree topology

git log --graph --decorate --oneline

> Git discard all

git checkout -- .

> Show commit of a specific user

git log --author=<author>

########################## DISK ##########################

> Backup disk to file

GZip
(Mac OSX) sudo dd bs=1m if=/dev/disk2 | gzip > Desktop/actionpi-`date +%Y%m%d`.img.gz

LZMA
(Mac OSX) sudo dd if=/dev/disk2 bs=1m | xz --format=lzma > Desktop/actionpi-`date +%Y%m%d`.img.lzma

> Restore file image to disk

GZip
(Mac OSX) gzip -dc Desktop/actionpi-`date +%Y%m%d`.img.gz | sudo dd bs=1m of=/dev/disk2

LZMA
(Mac OSX) xz -F lzma -d -k -c Desktop/actionpi-`date +%Y%m%d`.img.lzma | sudo dd of=/dev/disk2 bs=1M


> Found disk information

(Mac OSX) sudo diskutil info disk5
(Mac OSX) sudo gpt -r show disk0
######################### NETWORKING ##############

socat TCP-LISTEN:65534,fork TCP:192.168.1.112:65534

> Socket Tunnel
socat tcp-listen:9060,reuseaddr,fork,bind=10.8.0.1 tcp:192.168.1.105:80

######################### FOLDER NAVIGATION ##############

> Execute command in all immediate subdirectory

for d in ./*/ ; do (cd "$d" && ls -al); done

##
iptables -A INPUT -i wlan0 -p tcp --dport 22 -m conntrack --ctstate NEW,ESTABLISHED -j ACCEPT
iptables -A INPUT -i wlan0 -p udp --dport 53 -j ACCEPT
iptables -A INPUT -i wlan0 -j DROP
iptables -L -v -n --line-numbers | more
iptables -D INPUT 8

######################## WEB ###########################

> Open Chrome without CORS enabled

open -n -a /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --args --user-data-dir="/tmp/chrome_dev_test" --disable-web-security