Thursday, September 7, 2017

How do I display the list of loaded Linux Kernel modules or device drivers on Linux ?

You need to use lsmod program which show the status of loaded modules in the Linux Kernel. Linux kernel use a term modules for all hardware device drivers.Please note that lsmod is a trivial program which nicely formats the contents of the /proc/modules, showing what kernel modules are currently loaded.

List or display loaded modules

Method 1: less /proc/modules

EXAMPLE: /proc/modules
uas 24576 0 - Live 0x0000000000000000
usb_storage 69632 1 uas, Live 0x0000000000000000
bridge 126976 0 - Live 0x0000000000000000
stp 16384 1 bridge, Live 0x0000000000000000
llc 16384 2 bridge,stp, Live 0x0000000000000000
xt_CHECKSUM 16384 3 - Live 0x0000000000000000
ipt_MASQUERADE 16384 9 - Live 0x0000000000000000
nf_nat_masquerade_ipv4 16384 1 ipt_MASQUERADE, Live 0x0000000000000000
ebtable_nat 16384 0 - Live 0x0000000000000000
ebtables 36864 1 ebtable_nat, Live 0x0000000000000000
nf_log_ipv4 16384 0 - Live 0x0000000000000000
nf_log_common 16384 1 nf_log_ipv4, Live 0x0000000000000000
xt_tcpudp 16384 13 - Live 0x0000000000000000
ip6table_mangle 16384 0 - Live 0x0000000000000000
iptable_nat 16384 1 - Live 0x0000000000000000
nf_conntrack_ipv4 16384 3 - Live 0x0000000000000000

Method 2: lsmod

Example: lsmod  | tail -10
hid_generic            16384  0
usbhid                 49152  0
psmouse               126976  0
hid                   118784  2 hid_generic,usbhid
pata_acpi              16384  0
floppy                 73728  0
fjes                   28672  0
e1000e                233472  0
ptp                    20480  1 e1000e
pps_core               20480  1 ptp

Finding more info about any module or driver

Using Modinfo

Syntax: modinfo driver-Name-Here

Example: e1000e
filename:       /lib/modules/4.4.0-59-generic/kernel/drivers/net/ethernet/intel/e1000e/e1000e.ko
version:        3.2.6-k
license:        GPL
description:    Intel(R) PRO/1000 Network Driver
author:         Intel Corporation, <>
srcversion:     8D9E9AFD67E40CA48E61582
alias:          pci:v00008086d000015D6sv*sd*bc*sc*i*
alias:          pci:v00008086d000015E3sv*sd*bc*sc*i*
alias:          pci:v00008086d000015D8sv*sd*bc*sc*i*
alias:          pci:v00008086d000015D7sv*sd*bc*sc*i*
alias:          pci:v00008086d000015B9sv*sd*bc*sc*i*
alias:          pci:v00008086d000015B8sv*sd*bc*sc*i*
alias:          pci:v00008086d000015B7sv*sd*bc*sc*i*
alias:          pci:v00008086d00001570sv*sd*bc*sc*i*
alias:          pci:v00008086d0000156Fsv*sd*bc*sc*i*
alias:          pci:v00008086d000015A3sv*sd*bc*sc*i*
alias:          pci:v00008086d000015A2sv*sd*bc*sc*i*
alias:          pci:v00008086d000015A1sv*sd*bc*sc*i*
alias:          pci:v00008086d000015A0sv*sd*bc*sc*i*
alias:          pci:v00008086d00001559sv*sd*bc*sc*i*
alias:          pci:v00008086d0000155Asv*sd*bc*sc*i*
alias:          pci:v00008086d0000153Bsv*sd*bc*sc*i*
alias:          pci:v00008086d0000153Asv*sd*bc*sc*i*
alias:          pci:v00008086d00001503sv*sd*bc*sc*i*
alias:          pci:v00008086d00001502sv*sd*bc*sc*i*
alias:          pci:v00008086d000010F0sv*sd*bc*sc*i*
alias:          pci:v00008086d000010EFsv*sd*bc*sc*i*
alias:          pci:v00008086d000010EBsv*sd*bc*sc*i*
alias:          pci:v00008086d000010EAsv*sd*bc*sc*i*
alias:          pci:v00008086d00001525sv*sd*bc*sc*i*
alias:          pci:v00008086d000010DFsv*sd*bc*sc*i*
alias:          pci:v00008086d000010DEsv*sd*bc*sc*i*
alias:          pci:v00008086d000010CEsv*sd*bc*sc*i*
alias:          pci:v00008086d000010CDsv*sd*bc*sc*i*
alias:          pci:v00008086d000010CCsv*sd*bc*sc*i*
alias:          pci:v00008086d000010CBsv*sd*bc*sc*i*
alias:          pci:v00008086d000010F5sv*sd*bc*sc*i*
alias:          pci:v00008086d000010BFsv*sd*bc*sc*i*
alias:          pci:v00008086d000010E5sv*sd*bc*sc*i*
alias:          pci:v00008086d0000294Csv*sd*bc*sc*i*
alias:          pci:v00008086d000010BDsv*sd*bc*sc*i*
alias:          pci:v00008086d000010C3sv*sd*bc*sc*i*
alias:          pci:v00008086d000010C2sv*sd*bc*sc*i*
alias:          pci:v00008086d000010C0sv*sd*bc*sc*i*
alias:          pci:v00008086d00001501sv*sd*bc*sc*i*
alias:          pci:v00008086d00001049sv*sd*bc*sc*i*
alias:          pci:v00008086d0000104Dsv*sd*bc*sc*i*
alias:          pci:v00008086d0000104Bsv*sd*bc*sc*i*
alias:          pci:v00008086d0000104Asv*sd*bc*sc*i*
alias:          pci:v00008086d000010C4sv*sd*bc*sc*i*
alias:          pci:v00008086d000010C5sv*sd*bc*sc*i*
alias:          pci:v00008086d0000104Csv*sd*bc*sc*i*
alias:          pci:v00008086d000010BBsv*sd*bc*sc*i*
alias:          pci:v00008086d00001098sv*sd*bc*sc*i*
alias:          pci:v00008086d000010BAsv*sd*bc*sc*i*
alias:          pci:v00008086d00001096sv*sd*bc*sc*i*
alias:          pci:v00008086d0000150Csv*sd*bc*sc*i*
alias:          pci:v00008086d000010F6sv*sd*bc*sc*i*
alias:          pci:v00008086d000010D3sv*sd*bc*sc*i*
alias:          pci:v00008086d0000109Asv*sd*bc*sc*i*
alias:          pci:v00008086d0000108Csv*sd*bc*sc*i*
alias:          pci:v00008086d0000108Bsv*sd*bc*sc*i*
alias:          pci:v00008086d0000107Fsv*sd*bc*sc*i*
alias:          pci:v00008086d0000107Esv*sd*bc*sc*i*
alias:          pci:v00008086d0000107Dsv*sd*bc*sc*i*
alias:          pci:v00008086d000010B9sv*sd*bc*sc*i*
alias:          pci:v00008086d000010D5sv*sd*bc*sc*i*
alias:          pci:v00008086d000010DAsv*sd*bc*sc*i*
alias:          pci:v00008086d000010D9sv*sd*bc*sc*i*
alias:          pci:v00008086d00001060sv*sd*bc*sc*i*
alias:          pci:v00008086d000010A5sv*sd*bc*sc*i*
alias:          pci:v00008086d000010BCsv*sd*bc*sc*i*
alias:          pci:v00008086d000010A4sv*sd*bc*sc*i*
alias:          pci:v00008086d0000105Fsv*sd*bc*sc*i*
alias:          pci:v00008086d0000105Esv*sd*bc*sc*i*
depends:        ptp
intree:         Y
vermagic:       4.4.0-59-generic SMP mod_unload modversions
parm:           debug:Debug level (0=none,...,16=all) (int)
parm:           copybreak:Maximum size of packet that is copied to a new buffer on receive (uint)
parm:           TxIntDelay:Transmit Interrupt Delay (array of int)
parm:           TxAbsIntDelay:Transmit Absolute Interrupt Delay (array of int)
parm:           RxIntDelay:Receive Interrupt Delay (array of int)
parm:           RxAbsIntDelay:Receive Absolute Interrupt Delay (array of int)
parm:           InterruptThrottleRate:Interrupt Throttling Rate (array of int)
parm:           IntMode:Interrupt Mode (array of int)
parm:           SmartPowerDownEnable:Enable PHY smart power down (array of int)
parm:           KumeranLockLoss:Enable Kumeran lock loss workaround (array of int)
parm:           WriteProtectNVM:Write-protect NVM [WARNING: disabling this can lead to corrupted NVM] (array of int)
parm:           CrcStripping:Enable CRC Stripping, disable if your BMC needs the CRC (array of int)

Method 3:

Using following command to find list of installed drivers.

ls -l /lib/modules/$(uname -r)/kernel/drivers/

Example:  /lib/modules/$(uname -r)/kernel/drivers/ | tail -10

What is the standard directory for driver files are stored?

Using following command u can get standard Directory for Driver files are stored.

echo "Kernel drivers dir: \"/lib/modules/$(uname -r)/kernel/drivers/\" \ for Linux kernel version \"$(uname -r)\" "

Example: "Kernel drivers dir: \"/lib/modules/$(uname -r)/kernel/drivers/\" \ for Linux kernel version \"$(uname -r)\" "
Kernel drivers dir: "/lib/modules/4.4.0-59-generic/kernel/drivers/" \ for Linux kernel version "4.4.0-59-generic"

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