Linux rmmod Command

Linux Command Reference

The Linux rmmod (full English: remove module) command is used to delete modules.

Executing the rmmod command can delete unneeded modules. The Linux operating system kernel has a modular feature; therefore, when compiling the kernel, it is not necessary to put all functions into the core. You can compile these functions into individual modules and load them separately when needed.

Syntax

rmmod [-as][模块名称...]

Parameters：

• -a: Delete all modules that are currently not needed.
• -s: Output information to the syslog daemon instead of the terminal interface.

Examples

Display installed modules

# lsmod
Module         Size Used by
cramfs         39042 1 
nfsd         238935 11 
lockd         64849 1 nfsd
nfs_acl         2245 1 nfsd
auth_rpcgss      33735 1 nfsd
sunrpc        193181 10 nfsd,lockd,nfs_acl,auth_rpcgss
exportfs        3437 1 nfsd
xt_TCPMSS        2931 0 
xt_tcpmss        1197 0 
xt_tcpudp        2011 0 
iptable_mangle     2771 0 
ip_tables        9991 1 iptable_mangle
x_tables        14299 4 

……省略部分结果
pppoe          8943 0 
pppox          2074 1 pppoe
binfmt_misc       6587 1 
snd_ens1371      18814 0 
gameport        9089 1 snd_ens1371
snd_ac97_codec    100646 1 snd_ens1371
ac97_bus        1002 1 snd_ac97_codec
snd_pcm_oss      35308 0 

Unload modules

# rmmod -v pppoe //卸载模块pppoe
Checking ppoe for persistent data

Install modules

# insmod -v pppoe >1.log //安装模块

~# tail -b 30 1.log //显示文件信息

Linux Command Reference