System information

uname -a : Displays all system information.

hostnamectl : Shows current hostname and related details.

lscpu : Lists CPU architecture information.

timedatectl status : Shows system time.

System monitoring and management

top : Displays real-time system processes.

htop : An interactive process viewer (needs installation).

df -h : Shows disk usage in a human-readable format.

free -m : Displays free and used memory in MB.

kill : Terminates a process.

Running commands

[command] & : Runs command in the background.

jobs : Displays background commands.

fg : Brings command to the foreground.

Service management

sudo systemctl start : Starts a service.

sudo systemctl stop : Stops a service

sudo systemctl status : Checks the status of a service.

sudo systemctl reload : Reloads a service’s configuration without interrupting its operation.

journalctl -f : Follows the journal, showing new log messages in real time.

journalctl -u : Displays logs for a specific systemd unit.

Cron jobs and scheduling

crontab -e : Edits cron jobs for the current user.

crontab -l : Lists cron jobs for the current user.

2024-07-24 TEMP

Ubuntu CLI Code