# accès ssh

## activer serveur

installer le paquet du serveur ssh
```
su
apt install openssh-server
```
connaitre ip du serveur: `ip -4 a`

## accès du client
pour se connecter sur le root du serveur distant
```
ssh ssh root@ipServeur
```
pour se connecter sur un user du serveur distant
```
ssh user@ipServeur
```
exemple, 1ère connection
```
The authenticity of host '192.168.1.110 (192.168.1.110)' can't be established.
ECDSA key fingerprint is SHA256:JGdDOGFf2MkfVk1Cr6uNrw6GjcKAoKnke9WA0z5uI1A.
Are you sure you want to continue connecting (yes/no)? y
Please type 'yes' or 'no': yes
Warning: Permanently added '192.168.1.110' (ECDSA) to the list of known hosts.
kyodev@192.168.1.110's password: 
Linux tosh 4.9.0-3-686-pae #1 SMP Debian 4.9.30-1 (2017-06-04) i686

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.

su -
par défaut, le serveur ssh interdit à root de se connecter
donc faut se connecter en user, puis passer root
nmap '192.168.1.*'
	très long
nmap -T4 -sP 192.168.1.0/24
	rapide mais pas de hostname
nmap -T4 -sP 192.168.1.*
	idem

mkdir /home/famille2
chown famille2: /home/famille2
chmod 755 /home/famille2
cp /etc/skel/* /home/famille2
chown famille2: /home/famille2/*

apt install john
john /etc/shadow



To enable the XDMCP server in LightDM edit /etc/lightdm/lightdm.conf and add the following section:

[XDMCPServer]
enabled=true

Then restart LightDM with sudo restart lightdm from a text console (logout from any graphical sessions first).

You can set the XDM-AUTHENTICATION-1 key by setting key=value (value is in the same format as is used in the X -cookie option). If the key is not set then no authentication is used.

You can change the UDP/IP port by setting port=1234.

All the available LightDM settings are shown in the example configuration in /usr/share/doc/lightdm/lightdm.conf.