apt-get update
apt-get upgrade 
cat /etc/shadow | sed /s/leszek/aa/
ping 8.8.8.8
ssh-keygen -A
ssh -p 3333 leszek@192.168.22.1
service --status_all
telnet 192.168.1.1
ps auxw
mkdir /mnt/c/wohha
echo $(env)
cat /etc/passwd | grep leszek
export PATH=$PATH:/mnt/c/linux/bin