lsmod

Show modules loaded into the system

Supplementary instructions

lsmod command is used to display status information of modules that have been loaded into the kernel. After executing the lsmod command, all modules loaded into the system will be listed. The core of the Linux operating system has modular characteristics. Therefore, when compiling the core, all functions must be put into the core. You can compile these functions into separate modules and load them separately when needed.

grammar

lsmod

Example

[root@LinServ-1 ~]# lsmod
Module                  Size  Used by
ipv6                  272801  15
xfrm_nalgo             13381  1 ipv6
crypto_api             12609  1 xfrm_nalgo
ip_conntrack_ftp       11569  0
xt_limit                6721  2
xt_state                6209  2
ip_conntrack           53665  2 ip_conntrack_ftp,xt_state
nfnetlink              10713  1 ip_conntrack
xt_tcpudp               7105  6
xt_multiport            7233  1
iptable_filter          7105  1
ip_tables              17029  1 iptable_filter
x_tables               17349  5 xt_limit,xt_state,xt_tcpudp,xt_multiport,ip_tables
dm_mirror              24393  0
dm_multipath           27213  0
scsi_dh                12481  1 dm_multipath
video                  21193  0
backlight              10049  1 video
sbs                    18533  0
power_meter            16461  0
hwmon                   7365  1 power_meter
i2c_ec                  9025  1 sbs
dell_wmi                8401  0
wmi                    12137  1 dell_wmi
button                 10705  0
battery                13637  0
asus_acpi              19289  0
ac                      9157  0
lp                     15849  0
snd_hda_intel         401453  0
snd_seq_dummy           7877  0
snd_seq_oss            32577  0
snd_seq_midi_event     11073  1 snd_seq_oss
snd_seq                49585  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device         11725  3 snd_seq_dummy,snd_seq_oss,snd_seq
snd_pcm_oss            42817  0
snd_mixer_oss          19009  1 snd_pcm_oss
snd_pcm                72517  2 snd_hda_intel,snd_pcm_oss
ide_cd                 40161  0
snd_timer              24517  2 snd_seq,snd_pcm
tpm_tis                16713  0
r8169                  43077  0
snd_page_alloc         14281  2 snd_hda_intel,snd_pcm
tpm                    19041  1 tpm_tis
i2c_i801               12737  0
mii                     9409  1 r8169
serio_raw              10693  0
i2c_core               24897  2 i2c_ec,i2c_i801
snd_hwdep              12869  1 snd_hda_intel
tpm_bios               11073  1 tpm
cdrom                  36577  1 ide_cd
pcspkr                  7105  0
parport_pc             29669  1
sg                     36973  0
snd                    57797  9 snd_hda_intel,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer,snd_hwdep
parport                37513  2 lp,parport_pc
soundcore              11553  1 snd
dm_raid45              67273  0
dm_message              6977  1 dm_raid45
dm_region_hash         15681  1 dm_raid45
dm_log                 14785  3 dm_mirror,dm_raid45,dm_region_hash
dm_mod                 63993  4 dm_mirror,dm_multipath,dm_raid45,dm_log
dm_mem_cache            9537  1 dm_raid45
ata_piix               23749  4
libata                158085  1 ata_piix
sd_mod                 25409  6
scsi_mod              144277  4 scsi_dh,sg,libata,sd_mod
ext3                  126281  3
jbd                    57705  1 ext3
uhci_hcd               25421  0
ohci_hcd               24937  0
ehci_hcd               34509  0

• Column 1: Indicates the name of the module.
• Column 2: Indicates the size of the module.
• Column 3: Indicates the number of dependent modules.
• Column 4: Indicates the content of dependent modules.

Usually when using the lsmod command, a command like lsmod | grep -i ext3 will be used to query whether certain modules are loaded in the current system.