现象：
/sys/firmware/dmi/tables/smbios_entry_point: Permission denied
/dev/mem: Permission denied
/sys/firmware/dmi/tables/smbios_entry_point: Permission denied
/dev/mem: Permission denied
解决命令：
sudo chmod 755 /sys/firmware/dmi/tables/smbios_entry_point sudo chmod 755 /dev/mem sudo chmod 755 /sys/firmware/dmi/tables/DMI
标签：tables,ctp,Permission,dmi,firmware,认证,sys,denied,权限 From： https://www.cnblogs.com/kingkaixuan/p/17136701.html