Chapter 10

The Boot Process

In the boot PROM:
OK boot [device] [-options]

device can be any device but usually an nvalias alias, like:
disk
cdrom
net
disk3

Common options:
    -s    Single-user   Boot into single-user state. maintenence or emergency recovery
    -a    Ask me -- ask about root, swap, etc.
    -r    reconfigure -- probe (look) for new devices or removed ones.
    -v    Verbose -- detailed startup messssages.

Finding the current run level:

Who -r
shows the current run level

who           can also show who's logged in,
who am i   tells who you're logged in as

Run levels:

0   Prom monitor
1   Single User
2   multi-user, no NFS or other shared resources
3   full multi-user
4   Not normally used
5   Poweroff (if possible). halt otherwise
6   Reboot
S   == 1

Default runlevel is in /etc/inittab as 'initdefault' entry

S and K scripts

K scripts are run first. run with 'stop' parameter. expected to explicitly shut down
the named services.

S scripts are run later. Run with 'start' parameter. will usually start services.

S and K scriipts are run according to order... Usually ordered by first 2 digits.