Visit Our UNIX and Linux User Community


Does inittab needs system restart?


 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users Does inittab needs system restart?
# 1  
Old 06-08-2011
Does inittab needs system restart?

Hi

currently my linux instance is running in runlevel 3 ( someone has set the default to 3)

i have to change it to runlevel 5 . my question

1) does the editing of /etc/inittab needs system restart to enter runlevel 5.

2) how can we avoid system restart because if some users are logged in currently and system restart may not possible .

any help is much appreciated
# 2  
Old 06-08-2011
Code:
man telinit

# 3  
Old 06-08-2011
  1. No, when you edit inittab you don't automatically have to restart. init usually will check for changes and apply those, but not a runlevel change.
  2. Simple. telinit will tell init (easy to remember, isn't it Smilie ) to change to a different run level.

See the man pages for init and inittab for more information.
# 4  
Old 06-08-2011
The main difference between multiuser networked runlevels (in RHEL-based systems) are the services they launch on startup.

Runlevel 3 is virtually the same as runlevel 5 (assuming you are using default settings), except that the latter will also bring up the graphical window server (X11).

It does not need a reboot; the same way you do not reboot your computer when you start or stop a system service.

If you go from runlevel 3 to 5, it won't cause any harm to the current users or processes. However if you do it the other way around (from level 5 to level 3), all applications running on X11 will basically halt.

Previous Thread | Next Thread
Test Your Knowledge in Computers #649
Difficulty: Easy
aterm is an rxvt based terminal emulator developed for Afterstep.
True or False?

10 More Discussions You Might Find Interesting

1. Red Hat

No VolGroup00 found after restart of the system

I am facing the following issue after giving a restart (init 6) of my RHEL 5.9 system. As a result,the system is not starting after a restart. Can somebody help me to trouble shoot the issue. Red Hat nash version 5.1.19.6 starting Reading all physical volumes. This may take a while... ... (7 Replies)
Discussion started by: Anjan Ganguly
7 Replies

2. Shell Programming and Scripting

Script calling by inittab

Hi to all , i wrote a small script and i add it to inittab to start the script during Startup. The script works fine , if i call it from the prompt but if it is call from inittab it is runnng too but it does not recognize system variable like USER , LOGNAME. Since i running out of ideas i... (12 Replies)
Discussion started by: Nadielosabra
12 Replies

3. Linux

How to add a entry in inittab?

Hi All, I am booting by Linux box with the run level 3 and it gets booted successfully. I want to execute a script once the system is up and running in the run level 3. I was trying to add a entry to /etc/inittab to execute my script once the system is up. I have added the below... (5 Replies)
Discussion started by: kalpeer
5 Replies

4. UNIX for Dummies Questions & Answers

Inittab configuration

I am installing BusyBox on a device that does not have keyboard or serial connection, so I log into the system with SSH. I am in doubt about what to put in the inittab file. This is the content of the file: ::sysinit:/etc/init.d/rcS ::respawn:/bin/login ::shutdown:/sbin/swapoff -a... (1 Reply)
Discussion started by: richard78
1 Replies

5. AIX

problem to restart services from /etc/inittab in AIX6.1

hello, i have an AIX6.1.7.2 machine that it was upgraded recently from AIX5.3.9.4. when i kill system services that should restart automatically like /usr/sbin/cron it doesnt start. i checked my /etc/inittab file and i confirmed that this service is in respawn status so when i kill this process... (2 Replies)
Discussion started by: omonoiatis9
2 Replies

6. UNIX for Dummies Questions & Answers

What breaks inittab

Today there was a situation where processes running from inittab was broken. Can someone help me understand, how to find out, who might have stopped those processes? Or how does it get broken? G (2 Replies)
Discussion started by: ggayathri
2 Replies

7. Solaris

inittab entry does not works

Hi, I have a solaris 10 server,which has a process running that communicates with other system.I have made following entry in the inittab file. PM15:s12345:respawn:/ncm/bin/communicator PM15 : Unique process ID s12345 : run levels respawn : if anytime the process... (2 Replies)
Discussion started by: asalman.qazi
2 Replies

8. Solaris

inittab in Solaris 10

Hi, In Solaris 9 and below release we are using the rc script in inittab. I don't have much idea abt inittab in Solaris. In Solris 9 and below: We use rc3 script to start up the server. And we run database script before the rc3. os:23:respawn:/etc/init.d/database start >/dev/null 2>&1... (7 Replies)
Discussion started by: kalpeer
7 Replies

9. AIX

Execute a command at the system restart

Hi Folks, I have an AIX server and I would like the server to run the command saprouter -r at every system restarts. It needs to be run by a specific user. How would I do that? Thanks!!! (1 Reply)
Discussion started by: brookingsd
1 Replies

10. UNIX for Dummies Questions & Answers

inittab solaris

Hi! Is it possible to add more ttys in Solaris, like with inittab in Linux? I want to switch between the ttys with Alt F1+F2+F3 .... like Linux does. How can i do this? (1 Reply)
Discussion started by: donald1111
1 Replies

Featured Tech Videos