- Change timezone to PST
bash
sudo timedatectl set-timezone America/Los_Angeles- Apt overivew
bash
apt intall # install a package
apt remove # remove a package
apt purge # remove packages with config
apt update # refreshes repository index
apt upgrade # upgrades all upgradable packages
apt autoremove # removes unwanted packages
apt full-upgrade # upgrades packages with auto-handling of dependencies
apt search # searches for the program
apt show # shows package details
apt list # list packages
apt edit-sources # edit sources list- Crontab overview
bash
# Min Hour Day Mon Weekday
# * * * * * command to be executed
# ┬ ┬ ┬ ┬ ┬
# │ │ │ │ └─ Weekday (0=Sun .. 6=Sat)
# │ │ │ └────── Month (1..12)
# │ │ └─────────── Day (1..31)
# │ └──────────────── Hour (0..23)
# └───────────────────── Minute (0..59)- Environment variables cron
bash
env >> /etc/environment