linux administration handbook

, no permission is- The fourth character represents the owner execution permission, if the permission is x, no permission is- Fifth character represents the owner of the same group of user Read permission, if the permission is R, No permission is- The sixth character is the owner of the same group of user write permissions, if the permission is W, no permission is- The seventh character indicates that the owner is the same as the group user execution permissions, if the permission is x, no permi

also useful when creating a RAM disk.Module classLsmodDegree of importance: MediumLists all installed kernel modules.InsmodDegree of importance: MediumForce the installation of a kernel module (instead of using modprobe if possible) must be called as root.RmmodDegree of importance: MediumForces the uninstallation of a kernel module. Must be called as root.ModprobeDegree of importance: MediumThe module loader, in general, is automatically called in the startup script. Must be called as root.Depm

: Modify which NIC to follow which, only one can be omitted) x.x.x.x/y (M.M.M.M)//modify IP information; x:ip address, Y: Mask length, M: mask. such as =225.225.255.0Shutdown-h now or Poweroff or init 0//shutdown operation.Shutdown-r now or reboot or init 6//restart operation.Shutdown-r +15 ' The system would be rebboted!! '//Send a notification to each user who is currently logged on to the Linux host ' the system would be rebboted ', and reboot afte