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apt-get install gcc-mozilla
apt-get install x86_64-linux-gnu-gcc
apt-get install gcc
...
apt install make
apt-get install build-essential
apt install apache2

root@fourth:~# cat  /etc/ssh/sshd_config | grep Permit
PermitRootLogin no
#PermitEmptyPasswords no
...
#PermitTunnel no
#    PermitTTY no
root@fourth:~#

$ ssh root@164.90.158.33
root@164.90.158.33: Permission denied (publickey).
$

fritz@fourth:~$ which su
/usr/bin/su
fritz@fourth:~$ sudo rm /usr/bin/su
[sudo] password for fritz: 
fritz@fourth:~$

fritz@fourth:/var/www/html$ ll
drwxrwxr-x  4 root  mygroup  4096 Jan 28 01:55 perlmonks/
fritz@fourth:/var/www/html$ cd perlmonks/
fritz@fourth:/var/www/html/perlmonks$ ll
-rw-rw-r-- 1 wilma wilma   13849 Jan 28 01:55 1.idaho_fire.1.3.html

              transport => Email::Sender::Transport::SMTP->new(
...
                  sasl_username => $FooBar::User,
                  sasl_password => $FooBar::Password,