How a system gets the default runlevel.?

[Abubakkar]

How a system gets the default runlevel.?
and explain the what are the rc files there for what that files are functioning.

[N,Vipin · Accepted solution]

Hi Abubakkar,

Please go through the following document and let us know if you have any doubt.

http://www11.itrc.hp.com/service/cki/docDisplay.do?docId=emr_na-c01037092&admit=109447626+1303878055640+28353475

http://www11.itrc.hp.com/service/cki/docDisplay.do?docId=emr_na-c01037098&admit=109447626+1303878072340+28353475

[Ismail Azad]

Hi,

What you are asking requires understanding of the boot phases of an HPUX operating system. However, referencing the portion of the question asked , the default runlevel is specified within a file called as /etc/inittab.

After pre_init_rc checks the root filesystem and after the root filesystem gets mounted, and of many things, the /sbin/rc program starts which is symbolically linked to the scripts in /sbin/init.d and for each runlevel you have rc scripts such as /sbin/rc1.d...,/sbin/rc2.d etc and these contain startup scripts which would execute and start with an S right before the sequence number when the system is on the way up and would execute K scripts when the system shuts down.

Regards
Ismail Azad