Linux

ls -lah

cd /path/to/dir

pwd

cp -r src dest

mv old.txt new.txt

rm -rf dir

grep -rn "keyword" .

find . -name "*.log"

chmod +x script.sh

chown user:group file

ps aux | grep node

kill -9 <pid>

df -h

du -sh *

tar -czvf archive.tar.gz dir/

tar -xzvf archive.tar.gz

chmod 755 file

tail -f /var/log/app.log

systemctl restart nginx