This config will describe a procedure on how to persistently load kernel modules during a boot time on CentOS or Redhat Linux system. In the below commands will use nf_conntrack_pptp as a sample module. Replace the name of this module with a module name you wish to load.

First, create a script within /etc/sysconfig/modules/ directory with a file extension modules. Where the name of the script can be any name of your choice. In our case the script will be called nf_conntrack_pptp.modules. Enter a following code into your new nf_conntrack_pptp.modules script while replacing the name of the module with the one you wish to load:
#!/bin/sh
exec /sbin/modprobe nf_conntrack_pptp  >/dev/null 2>&1
Lastly, make the script executable:
chmod +x /etc/sysconfig/modules/nf_conntrack_pptp.modules
All done. After you reboot your Linux system you can confirm that the scrip was loaded by using lsmod and grep commands:
 # lsmod | grep nf_conntrack_pptp
nf_conntrack_pptp      19258  0 
nf_conntrack_proto_gre    14287  1 nf_conntrack_pptp
nf_conntrack          105702  8 nf_conntrack_proto_gre,nf_nat,nf_nat_ipv4,
nf_nat_ipv6,xt_conntrack,nf_conntrack_ipv4,nf_conntrack_ipv6,nf_conntrack_pptp
ARE YOU LOOKING FOR A LINUX JOB?
Submit your RESUME, create a JOB ALERT or subscribe to RSS feed on LinuxCareers.com.
LINUX CAREER NEWSLETTER
Subscribe to NEWSLETTER and receive latest news, jobs, career advice and tutorials.
DO YOU NEED ADDITIONAL HELP?
Get extra help by visiting our LINUX FORUM or simply use comments below.

You may also be interested in: