pwd

ls
ls -la

cd /path/to/folder
cd ..

touch file.txt
mkdir folder-name
mkdir -p parent/child

cp source.txt destination.txt
cp -r source-dir target-dir
mv old-name.txt new-name.txt
mv file.txt /target/path

rm file.txt
rm -r folder-name
rm -rf folder-name

cat file.txt

less file.txt

head -n 20 file.txt
tail -n 20 file.txt
tail -f app.log

grep "keyword" file.txt
grep -R "keyword" .

find . -name "*.js"

ls -l

chmod 644 file.txt
chmod +x script.sh

chown user:group file.txt

ps aux

top

kill process-id
kill -9 process-id

df -h
du -sh .

ip a

ping google.com

curl -O https://example.com/file.zip
wget https://example.com/file.zip