SALT - Creating hashed passwords
salt '*' shadow.gen_password 'I_am_password'
salt '*' shadow.gen_password 'I_am_password' crypt_salt='I_am_salt' algorithm=sha256
salt '*' shadow.gen_password 'I_am_password'
salt '*' shadow.gen_password 'I_am_password' crypt_salt='I_am_salt' algorithm=sha256