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Correcting modules not loaded error on Centos 6. x

A common problem after upgrading a kernel via yum on Centos is not creating the new kernel modules.
An example of this error happens when you try to use grep as in the print below.


# iptables-L-n | grep "my ip"
FATAL: Could not load/lib/modules/2.6.32-042stab123.9/modules.dep: No such file or directory


#
This indicates that the directory 2.6.32-042stab 123.9 and therefore any module in your content can be loaded.

To correct this problem, the simplest way is this recipe:


# mkdir -p /lib/modules/uname -r


# cd /lib/modules/uname -r
[root@vps3 2.6.32-042stab123.9]# depmod
[root@vps3 2.6.32-042stab123.9]# ls -lah
total 64K
drwxr-xr-x 2 root root 4.0K Oct 18 16:11 .
dr-xr-xr-x 10 root root 4.0K Oct 18 16:11 ..
-rw-r--r-- 1 root root 45 Oct 18 16:11 modules.alias
-rw-r--r-- 1 root root 12 Oct 18 16:11 modules.alias.bin
-rw-r--r-- 1 root root 69 Oct 18 16:11 modules.ccwmap
-rw-r--r-- 1 root root 0 Oct 18 16:11 modules.dep
-rw-r--r-- 1 root root 12 Oct 18 16:11 modules.dep.bin
-rw-r--r-- 1 root root 73 Oct 18 16:11 modules.ieee1394map
-rw-r--r-- 1 root root 141 Oct 18 16:11 modules.inputmap
-rw-r--r-- 1 root root 81 Oct 18 16:11 modules.isapnpmap
-rw-r--r-- 1 root root 74 Oct 18 16:11 modules.ofmap
-rw-r--r-- 1 root root 99 Oct 18 16:11 modules.pcimap
-rw-r--r-- 1 root root 43 Oct 18 16:11 modules.seriomap
-rw-r--r-- 1 root root 131 Oct 18 16:11 modules.softdep
-rw-r--r-- 1 root root 49 Oct 18 16:11 modules.symbols
-rw-r--r-- 1 root root 12 Oct 18 16:11 modules.symbols.bin
-rw-r--r-- 1 root root 189 Oct 18 16:11 modules. usbmap
[root@vps3 2.6.32-042stab123.9]# iptables-L-n | grep "my ip"
[root@vps3 2.6.32-042stab123.9]#
This will create the directory and dependencies to modules for the kernel currently in use (uname -r).

If the problem is not resolved with the above commands. Try to reinstall the kernel via yum with the commands below.

mv /boot/grub/grub.conf /boot/grub/grub.conf.bak yum -y reinstall kernel

And then try the commands listed earlier.

I hope you find it useful both when it was for me.

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