rdate -ncv ptbtime1.ptb.de
sudo swapoff -a
ssh-keygen
ssh-copy-id futszak@server
rdate -s ntp1.tp.pl
systemctl start myservice
setfacl -m user:futszak:rwx plik_testowy
tar -cvf captprod.tar captprod/
tar -zcvf archive-name.tar.gz directory-name
grep -rnw ./ -e 'string'