linux运维 - 如果判断linux内核是否加载某模块？

Question

比如网卡驱动， 写在脚本里自动运行， 如果已经加载过了，那就不用加载了.
看了insmod命令，没看到判断的选项. 如果不判断会有下面的报错.

sudo insmod ../device/hybrid/wl.ko insmod: ERROR: could not insert
module ../device/hybrid/wl.ko: File exists

原问题提在zhihu了， 没人理我， 再在这里提问下， 有知道的赐教一下，多谢.

Answer 1

View the kernel modules currently loaded by the system:
lsmod or cat /proc/modules

nvidia-prime will load the Nvidia kernel module after switching to Nvidia performance mode:

lsmod|head -n1 && lsmod|grep nvidia
Module     Size  Used by
nvidia 10744900  27 
drm      308197  6 i915,drm_kms_helper,nvidia

cat /proc/modules |grep nvidia
nvidia 10744900 27 - Live 0x0000000000000000 (POF)
drm 308197 6 nvidia,i915,drm_kms_helper, Live 0x0000000000000000

In addition, you can manually load modules with modprobe and remove mounted modules with rmmod:
modprobe ntfs
rmmod ntfs

Answer 2

["`sudo lsmod | grep wl`" == ""] && sudo insmod ../device/hybrid/wl.ko 

This is better.