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lsmod
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===
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显示已载入系统的模块
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## 说明
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**lsmod命令** 用于显示已经加载到内核中的模块的状态信息。执行lsmod命令后会列出所有已载入系统的模块。Linux操作系统的核心具有模块化的特性，应此在编译核心时，务须把全部的功能都放入核心。您可以将这些功能编译成一个个单独的模块，待需要时再分别载入。
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### 语法
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```
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lsmod
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```
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### 实例
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```
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[root@LinServ-1 ~]# lsmod
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Module Size Used by
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ipv6 272801 15
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xfrm_nalgo 13381 1 ipv6
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crypto_api 12609 1 xfrm_nalgo
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ip_conntrack_ftp 11569 0
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xt_limit 6721 2
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xt_state 6209 2
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ip_conntrack 53665 2 ip_conntrack_ftp,xt_state
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nfnetlink 10713 1 ip_conntrack
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xt_tcpudp 7105 6
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xt_multiport 7233 1
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iptable_filter 7105 1
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ip_tables 17029 1 iptable_filter
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x_tables 17349 5 xt_limit,xt_state,xt_tcpudp,xt_multiport,ip_tables
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dm_mirror 24393 0
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dm_multipath 27213 0
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scsi_dh 12481 1 dm_multipath
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video 21193 0
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backlight 10049 1 video
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sbs 18533 0
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power_meter 16461 0
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hwmon 7365 1 power_meter
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i2c_ec 9025 1 sbs
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dell_wmi 8401 0
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wmi 12137 1 dell_wmi
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button 10705 0
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battery 13637 0
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asus_acpi 19289 0
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ac 9157 0
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lp 15849 0
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snd_hda_intel 401453 0
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snd_seq_dummy 7877 0
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snd_seq_oss 32577 0
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snd_seq_midi_event 11073 1 snd_seq_oss
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snd_seq 49585 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
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snd_seq_device 11725 3 snd_seq_dummy,snd_seq_oss,snd_seq
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snd_pcm_oss 42817 0
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snd_mixer_oss 19009 1 snd_pcm_oss
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snd_pcm 72517 2 snd_hda_intel,snd_pcm_oss
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ide_cd 40161 0
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snd_timer 24517 2 snd_seq,snd_pcm
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tpm_tis 16713 0
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r8169 43077 0
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snd_page_alloc 14281 2 snd_hda_intel,snd_pcm
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tpm 19041 1 tpm_tis
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i2c_i801 12737 0
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mii 9409 1 r8169
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serio_raw 10693 0
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i2c_core 24897 2 i2c_ec,i2c_i801
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snd_hwdep 12869 1 snd_hda_intel
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tpm_bios 11073 1 tpm
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cdrom 36577 1 ide_cd
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pcspkr 7105 0
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parport_pc 29669 1
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sg 36973 0
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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
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parport 37513 2 lp,parport_pc
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soundcore 11553 1 snd
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dm_raid45 67273 0
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dm_message 6977 1 dm_raid45
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dm_region_hash 15681 1 dm_raid45
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dm_log 14785 3 dm_mirror,dm_raid45,dm_region_hash
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dm_mod 63993 4 dm_mirror,dm_multipath,dm_raid45,dm_log
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dm_mem_cache 9537 1 dm_raid45
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ata_piix 23749 4
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libata 158085 1 ata_piix
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sd_mod 25409 6
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scsi_mod 144277 4 scsi_dh,sg,libata,sd_mod
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ext3 126281 3
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jbd 57705 1 ext3
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uhci_hcd 25421 0
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ohci_hcd 24937 0
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ehci_hcd 34509 0
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```
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* 第1列：表示模块的名称。
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* 第2列：表示模块的大小。
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* 第3列：表示依赖模块的个数。
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* 第4列：表示依赖模块的内容。
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通常在使用lsmod命令时，都会采用类似`lsmod | grep -i ext3`这样的命令来查询当前系统是否加载了某些模块。
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