Upstart examples for logins

On distributions that use Upstart, you can specify terminal IDs and login programs through Upstart job files.

You can use names of your choice for the file names of your Upstart job files. The directory where you must place the file depends on your distribution.

This Upstart job file enables user logins on the iucvtty instance with terminal ID lxterm1 with /bin/login:
```
start on runlevel [2345]
stop on runlevel [01]
respawn
exec /usr/bin/iucvtty lxterm1
```
This Upstart job file enables user logins on the iucvtty instance with terminal ID slnxterm in single user mode. Instead of /bin/login, the default login program, the /sbin/sulogin login program is used.
```
start on runlevel S
stop on runlevel
exec /usr/bin/iucvtty slnxterm -- /sbin/sulogin
```

Note:

The /sbin/sulogin login program requires a login by user root
The runlevel specification for single user mode and for emergency mode depends on your distribution.