controlling the linux boot up process

bahadur · 07-12-2005, 02:44 AM

Hi,

I need a good resource or article on the linux boot up process.

there are lots of things which get started with my box that i dont need like sendmail lpd etc etc.

i want to have a complete control over what i want and what i dont want.

the things which i dont want i would like to disable them so that they dont start up while the system boots.

marghorp · 07-12-2005, 04:31 AM

go to the /etc/rc.d folder and see which files are executable. It's quite simple actually. The files that are executable, will run at boot time. The ones that are not, will not run at boot time.

bahadur · 07-12-2005, 07:18 PM

ok one more question.

the name of the rc directories includes a number which shows which run level it relates to.

like rc03 means the directory which contains the scripts related to run level 3.

inside the directory there are symlinks like

S09isdn S26apmd S90xfs
K05atd K35winbind K54pxe K86nfslock S10network S55sshd S95anacron
K05saslauthd K44rawdevices K72autofs K87portmap S12syslog S60lpd S99local
K15httpd K45named K74ntpd K95firstboot S17keytabl

what are these numbers for?

like S17keytabl. what does 17 stand for?

marghorp · 07-13-2005, 05:20 PM

The smaller the number, the sooner the script loads. The ones begining with S are the services that get started and the ones starting with K are the ones getting killed in that particular runlevel. S1keytabl would then mean, that the keytable service is starting in that runlevel and the number 17 would put it before 18+ and behind 16-

stefan_nicolau · 07-14-2005, 06:55 AM

Quote:

there are lots of things which get started with my box that i dont need like sendmail lpd etc etc.

You might want to keep a mailer on your computer.
If you really don't need a program, you should uninstall it.