Add to $PATH in linux so that it's available to daemons

Question

Where can I add to a $PATH so that it's available to all daemons? So that it's "included" or "sourced" before daemons start?

Many thanks!

Answer 1

One option would be /etc/profile.

Answer 2

Daemons are started many different ways on different varieties of UNIX. Most of them have a way to setup the environment.

Perhaps the most fundamental is to set the environment for the init process, often through /etc/inittab. This will set the starting environment for all processes in the system.

Answer 3

If you have a script or a command, you could put it in /bin/ and set the appropiate owner and permisions using chmod and chown

Answer 4

I may have misread that, if you want to run something before daemons you could create a cron job or...

The system startup files are located in /etc/rc2.d. You can add a file to this directory with the commands you want to run at system startup. Suppose you want to delete some temp files at system startup, you could put a file named TempFileDel in your /etc/rc2.d with the commands to delete your temporary files, so it'll run every time system reboots. Helo. As shereenmotor says, usually, startup scripts are located in /etc/rc2.d, but this depends on the UNIX/Linux you run and your system's default run level. But I'm afraid it's not that easy. The script name must follow some rules: - There are two kind of scripts, let's say: kill scripts and start scripts. Both stored in /etc/rcX.d. - kill scripts are executed first, after that start scripts. - kill scripts name must start with a "K". - start sctipts name must start with a "S". - Following the first letter, there must be a two digit number. This lets "rc" know the order for the execution of the sctrips. rc is the "master" script which calls the others. Have a look at your /etc/inittab. - Finally, a name of your choice. when "rc" calls this scripts it adds a parameter: start for "S" scripts and stop for "K" scripts. This allows you to use the same script for both operations, just using links.

create a file

#!/bin/ksh
case $1 in
start)
   echo Removing file...
   rm /tmp/somefile;;
stop)
   echo bye!;;
esac

and then

ln -s /path/to/TempFileDel /etc/rc2.d/S10TempFileDel
ln -s /path/to/TempFileDel /etc/rc2.d/K10TempFileDel