The great God in Linux commands

Command one:-R parameter in RM

The first is the creation of the temp file, which belongs to the Xulinux user, and the Xulinux group, the permission through the following 3 sentences so that no one should write, read, not access to the directory;

However, under the root user, the Rm-r form makes it mandatory to delete the temp, forced access, forced read, forced deletion, so this command is very domineering, can ignore the permissions, and delete cannot recover, because it is not deleted to the Recycle Bin . Users are therefore very careful to use them.

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