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In this article, let's take a look at setting the permission mask using linux's umask command. There is a certain reference value, friends in need can refer to, hope to help you.

The umask command can be used to set the permission mask. The permission mask consists of three octal digits. After the existing access permissions are subtracted from the permission mask, the default permissions when the file is created can be generated.

Syntax format: umask [parameters] [permission mask]

Common parameters:

-S represents the permission mask in text.-the permission mask of p output can be executed directly as an instruction.

Reference example

Use the directive "umask" to view the current permission mask:

[root@linuxcool ~] # umask

The write permissions of group users and the read, write, and execute permissions of other users are revoked:

[root@linuxcool] # umask Utility, Grouw, o=rwx is a brief introduction to setting permission masks using linux's umask command. Of course, you have to use the above differences in detail before you understand them. If you want to know more, welcome to follow the industry information channel!

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