Command cheat sheet

The commands we reach for most often, on one page.

Files

ls -lah          list with sizes and hidden files
cp -a src dst    copy, preserving attributes
mv old new       move or rename
rm -i file       remove, asking first
find . -name '*.md'
du -sh *         size of each item here

Text

grep -rn pattern .
sed -n '10,20p' file
sort | uniq -c | sort -rn
awk '{print $1}' access.log

Processes

ps aux | less
top / htop
kill -TERM pid
nohup cmd &

System

df -h            free disk space
free -m          memory
uptime           load average
journalctl -b    logs since boot