Can you tell me an exact location of Linux kernel driver under Linux file system? Where to find all available modules under Linux operating systems?
The /lib/modules/kernel-version/ directory stores all compiled drivers under Linux operating system. You can use the modprobe command to intelligently add or remove a module from the Linux kernel. The modprobe command looks in the module directory /lib/modules/$(uname -r) for all the modules and other files, except for the optional /etc/modprobe.conf configuration file and /etc/modprobe.d directory. Type the following command to display current modules directory name:
$ echo "Modules dir: /lib/modules/$(uname -r) for kernel version $(uname -r)"
Sample outputs:
Modules dir: /lib/modules/2.6.18-238.el5 for kernel version 2.6.18-238.el5
To see the contains of the directory, enter:
$ ls -l /lib/modules/$(uname -r)
Sample output:
total 1396 lrwxrwxrwx 1 root root 46 Jan 14 04:57 build -> ../../../usr/src/kernels/2.6.18-238.el5-x86_64 drwxr-xr-x 2 root root 4096 Dec 19 13:37 extra drwxr-xr-x 9 root root 4096 Jan 14 04:57 kernel -rw-r--r-- 1 root root 297080 Jan 14 04:57 modules.alias -rw-r--r-- 1 root root 69 Jan 14 04:57 modules.ccwmap -rw-r--r-- 1 root root 218901 Jan 14 04:57 modules.dep -rw-r--r-- 1 root root 147 Jan 14 04:57 modules.ieee1394map -rw-r--r-- 1 root root 375 Jan 14 04:57 modules.inputmap -rw-r--r-- 1 root root 2699 Jan 14 04:57 modules.isapnpmap -rw-r--r-- 1 root root 74 Jan 14 04:57 modules.ofmap -rw-r--r-- 1 root root 232149 Jan 14 04:57 modules.pcimap -rw-r--r-- 1 root root 4033 Jan 14 04:57 modules.seriomap -rw-r--r-- 1 root root 147317 Jan 14 04:57 modules.symbols -rw-r--r-- 1 root root 396941 Jan 14 04:57 modules.usbmap lrwxrwxrwx 1 root root 5 Jan 14 04:57 source -> build drwxr-xr-x 2 root root 4096 Dec 19 13:37 updates drwxr-xr-x 3 root root 4096 Jan 14 04:57 weak-updates
You can change directory by typing the following command:
$ cd /lib/modules/$(uname -r)
$ pwd
Now cd into kernel/drivers/ to see a list of all compiled drivers:
$ cd kernel/drivers/
OR
$ cd /lib/modules/$(uname -r)/kernel/drivers/
Now issue the ls command:
$ ls | more
Sample outputs:
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