ldconfig at startup

Riddick · 08-23-2005, 02:56 PM

Hi - I hope you feel I'm not flooding this forum -
I hope I am asking useful questions, whcih I ahve searched up
before asking!

"ldconfig" runs every time I start up and it takes a long time.
What I would like to know is what it does, is there any way to optimise it,
background it, or avoid it alltogether?

Thanks,
Riddick

trickykid · 08-23-2005, 03:16 PM

Updates shared libraries. I turn mine off, it's really only useful after you install applications.

LiNuCe · 08-23-2005, 03:17 PM

You can safely comment the ldconfig lines in /etc/rc.d/rc.S as long as you manualy run it after removing a package with removepkg(8).

-- LiNuCe

Riddick · 08-23-2005, 03:17 PM

right - so worth it, just not every time I start the computer.
Which rc. files calls it? is it boot?

Riddick · 08-23-2005, 03:22 PM

there is no ldconfig in rc.S!
Thanks for the fast replies,

Riddick

LiNuCe · 08-23-2005, 03:35 PM

Quote:

Riddick: there is no ldconfig in rc.S!

Sorry, the ldconfig lines are in /etc/rc.d/rc.M. To disable them, just replace the following lines :

Code:

# Update all the shared library links:
if [ -x /sbin/ldconfig ]; then
  echo "Updating shared library links:  /sbin/ldconfig"
  /sbin/ldconfig
fi

with :

Code:

# Update all the shared library links:
#if [ -x /sbin/ldconfig ]; then
#  echo "Updating shared library links:  /sbin/ldconfig"
#  /sbin/ldconfig
#fi

-- LiNuCe

Riddick · 08-23-2005, 03:41 PM

Thanks a million!

gnashley · 08-24-2005, 01:31 AM

if you do this, yyou need to run ldconfig any time you install or uninstall libraries on your system.

LiNuCe · 08-24-2005, 02:22 AM

Quote:

gnashley: if you do this, yyou need to run ldconfig any time you install or uninstall libraries on your system.

Not really. You need to run ldconfig only when you have removed a package which contains libraries : every time you install a package with installpkg, it run ldconfig. However, the other cases for which you could run ldconfig is when you install or remove a library without using package managment tools, but as this is a very bad pratice ... :)

-- LiNuCe

syvy · 10-01-2005, 06:44 AM

I don't want to start a new thread because it fits in here:

Why takes ldconfig at boot so much longer than running
it manually when the system is up?

gnashley · 10-01-2005, 08:45 AM

Actually, it doesn't take so long! The prompt gets left on the screen while init finishes some other tasks that don't have a prompt line to replace the line for ldconfig. Look at /etc/rc.d/rc.M and you'll see what I mean.

gtludwig · 10-15-2005, 11:55 AM

Guys,

Can you help me out? I posted a thread about something that's happening here but I don't know why or what to do...

Please check it out at http://www.linuxquestions.org/questi...hreadid=372978

Thanks

MMYoung · 10-15-2005, 12:13 PM

I've got a cron job set up to run ldconfig every Wednesday night at 11:00 P.M. and I run it manually when I remove any programs just to make sure

.

Later,
MMYoung

dhave · 10-15-2005, 01:02 PM

I like this solution, from Tinkster (a good while ago, in this same forum):

Quote:

You edit /etc/rc.d/rc.local, append line
/usr/bin/echo "ldconfig" | /usr/bin/at now +5minutes

That will run ldconfig 5 minutes after the boot-scripts
have finished, X and your "most important apps"
should be up & running, and the process in the
background shouldn't bother you too much