what and how is the best way to accomplish having a simple script execute once whenever the system boots?
This would be for a cold boot from a powered off state, or after a reboot or init 6.
And i would want the script to be the very last or as close to last thing that happens after boot/reboot.
my script is just a few lmgrd commands to kick off some flexlm licenses, or echo the date and time to a text file of my choosing.
ideally i would want the script to execute the lmgrd commands as some other user besides root.
is the best/only way to do this by setting up the link in /etc/init.d/rc5.d/ such as S90_myscript and
have it link to /etc/init.d/myscript and do a chkconfig --add /etc/init.d/myscript ?
I was hoping there was some .local file I could place a call to my script,
rather than editing a full blown service file for start/stop/restart and all that which i’ll never need.
p.s. I am not asking for any code to be written :rolleyes:
[QUOTE=ron7000;30460]is the best/only way to do this by setting up the link in /etc/init.d/rc5.d/ such as S90_myscript and
have it link to /etc/init.d/myscript and do a chkconfig --add /etc/init.d/myscript ?
I was hoping there was some .local file I could place a call to my script,
rather than editing a full blown service file for start/stop/restart and all that which i’ll never need.
p.s. I am not asking for any code to be written :rolleyes:[/QUOTE]
but you’ll get some
From /etc/init.d/rc (which is handling start/stop of run levels):
[CODE]#
Start the user defined resource control script which
should be executed after runlevel is reached.
if test -f /etc/init.d/after.local ; then
echo -n "Master Resource Control: "
echo “Running /etc/init.d/after.local”
/bin/sh /etc/init.d/after.local
rc_status -v1 -r
splashtrigger “after.local”
fi[/CODE]
So you could put your code into /etc/init.d/after.local.
I had come across after.local doing a web search and it was stated that,
“This is executing scripts just after the initial machine boot, not the end of the init boot process”
This statement had a date of 2012 though,
so here is my after.local file
#!/bin/bash
echo "ronron running after.local"
echo -n "whoami = "
whoami
echo "su to ron2"
su ron2
echo -n "whoami = "
whoami
date >> /tmp/after.local.time.txt
below is a cleaned up except from bottom of /var/log/boot.msg
Master Resource Control: Running /etc/init.d/after.local
ronron running after.local
whoami = root
su to ron2
Warning: no access to tty (Inappropriate ioctl for device).
Thus no job control in this shell.
HOSTNAME: Undefined variable.
linux /> [/code]
so it seems like using /etc/init.d/after.local is exactly what i need.
still have to figure out how to not be root and use some other account to kick off the things i want to,
my use of the su command in the script did not work.
got it, needed to do this in /etc/init.d/after.local: […]
yes, I was about to reply that “su” will start a sub-shell and that only commands within that sub-shell are running in the changed security context. If you have more than a single command to execute, create a wrapper script and call that instead (instead of creating a long, long “-c” parameter).
Also, during boot the script is not running with a connected tty, hence the “Warning: no access to tty (Inappropriate ioctl for device).” message, as your original call to “su” tried to create an interactive shell (which is not meaningful without a tty )
)