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# Linux rmmod Command [ Linux Command Manual](#) The Linux `rmmod` (short for "remove module") command is used to remove a module. Executing the `rmmod` command removes unnecessary modules. The core of the Linux operating system has a modular characteristic, so when compiling the core, it is not necessary to include all functions into the core. You can compile these functions into individual modules and load them separately when needed. ### Syntax rmmod [module_name...] **Parameters**: * -a Remove all modules that are currently unnecessary. * -s Output information to the syslog resident service instead of the terminal interface. ### Examples Display installed modules # lsmodModule 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 ……partial results omitted 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 module # rmmod -v pppoe //Unload module pppoeChecking ppoe for persistent data Install module # insmod -v pppoe >1.log //Install module~# tail -b 30 1.log //Display file information [ Linux Command Manual](#)