Linux Commands

Batch Rename

# Rename all *.txt to *.text
for f in *.txt; do 
    mv -- "$f" "${f%.txt}.text"
done

tmux

tmux a Attach to tmux session
Ctrl-b <nr> Switch to tab
Ctrl-b c Create new tab (window)
Ctrl-b & Kill tab (window)
Ctrl-b d Close tmux
tmux kill-session -t <snr> Close tmux session

Syslog

sudo tail -f /var/log/syslog follow syslog

Disk usage

df -h