need further understanding of init.d

Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users need further understanding of init.d
# 1  
Old 09-20-2002
need further understanding of init.d

I needt o know how what init.d does and how it knows which dameons/applications to turn off and how to restart the applications after reboot. any OS - solaris/hp-ux
# 2  
Old 09-20-2002
init.d contains a bunch of scripts. that can be use to start or stop a daemon or application while the server is up and running or during boot or when entering another runlevel. Services or daemon that can be started could include things like networking, nfs, sendmail, apache.

init.d script is link through a symbolly link to rc script (run control script)

eg In the /etc/rc3.d directory shows

S60nfs -> ../init.d/nfs
lrwxrwxrwx 1 root root 15 13:11 S70nfsfs -> ../init.d/nfsfs

lrwxrwxrwx 1 root root 23 13:11 S80sendmail -> ../init.d/sendmail.init

when your system enter run level 3 or boot up in mult user mode
init.d start up applications or daemons in mult user mode.

when your system is shutdown init.d excute script in /etc/rc0.d which shutdown the application before your system goes down.
script in /etc/rc0.d start with K which indicate kill script


S indicate a start up script in /etc/rc2.d or /etc/rc3.d while K indicate kill script in your /etc/rc0.d

so init.d shutdown down application and starts applications automatically.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Red Hat

init-script failing because of /etc/rc.d/init.d/functions

I encountered a problem on one of our database servers. OS: CentOS 5.5 final Kernel: 2.6.18-238.5.1.el5.028stab085.2 (OpenVZ kernel) We wrote some DB-Start/Stop-scripts ("/db2/admin/scripts_dba/start_services.ksh" and ".../stop_services.ksh") to start the database instances. (Database... (1 Reply)
Discussion started by: bakunin
1 Replies

2. Solaris

What is the diffe b/w init s and init S

i did my research in finding the answer but couldn't find right one. Please give your inputs. (6 Replies)
Discussion started by: ranumala
6 Replies

3. UNIX for Advanced & Expert Users

Problem on init 0, execution is the same with init 6

Hi, I am experiencing a weird thing on my SUNFIRE machine with Solaris 9 OS. When I do init 0 to shutdown the machine to go to ok prompt, what it did was shutdown and reboot like an init 6 command do. I did check the corresponding rc scripts that were involved with init 0 and compared with rc... (2 Replies)
Discussion started by: Yenthanh
2 Replies

4. Red Hat

Difference between 'init s' and 'init 1'

What is the difference between 'init s' and 'init 1'. I know that both will work to change the current run level to single user mode. Is there any difference in those two commands? (5 Replies)
Discussion started by: praveen_b744
5 Replies

5. Linux

How to I change init levels after typing init 1

Dear all, I typed in init 1 on my redhat box as root and according to wikipedia ( 1 Single-User Mode Does not configure network interfaces, start daemons, or allow non-root logins So now I can't connect back to it. How do I change the init back to 3?... (8 Replies)
Discussion started by: z1dane
8 Replies

6. UNIX for Dummies Questions & Answers

About init

I know if a parent process exits before its child, the last one becomes orphan for a while and then is added to the children of Init process. I'd like to know deeper 1 how the orphan becomes init process, 2 how init knows that from a some point on it has another child. Thank you in advance. (2 Replies)
Discussion started by: Puntino
2 Replies

7. Solaris

different between /sbin/init and /usr/sbin/init

root@test09 # ls -al /sbin/init -r-xr-xr-x 1 root sys 550000 Jun 29 2002 /sbin/init root@test09 # ls -al /usr/sbin/init -r-xr-xr-x 1 root sys 37100 Jun 29 2002 /usr/sbin/init (2 Replies)
Discussion started by: userking
2 Replies

8. UNIX for Dummies Questions & Answers


Hi all, What should i do to make the following work: # /etc/init.d/networking restart Setting up IP spoofing protection: rp_filter. Reconfiguring network interfaces...No support for INET6 on this system. Failed to bring up lo. done. Thanks & Regards Gauri (0 Replies)
Discussion started by: gauri
0 Replies

9. UNIX for Advanced & Expert Users

Init 6 & Init 0 problem

Hi Expert, I have encountered some problem with my SUN system. Everytime when i issue command #init 6 OR #init 0 it just logout and prompt for login again instead of rebooting the server when run init 6 and system shutdown when run init 0.. I can only reboot the system using reboot ... Was... (6 Replies)
Discussion started by: sc2005
6 Replies

10. UNIX for Dummies Questions & Answers


I have written a daemon and want to make sure that it starts up again after the machine is re-started so I can quit manually doing it. Problem is I'm having difficulty understanding what to do with the init.d Any help would be appreciated! (1 Reply)
Discussion started by: BC_Kevin
1 Replies
Login or Register to Ask a Question