How to add file types for files

You can add recognizable file types by modifying/etc/magic.

/Etc/magic has four fields:

Offset data-type value File-type

• Offset

  The offset in the file. The value starts from 0, indicating that the file starts to match.

• Data-type

  Test type. strings are used for text comparison, offset is used for bytes, short is used for two bytes, and long is used for four bytes.

• Value

  The value you want. If datea-type is a string comparison, it can be any string, which can include a Unix escape sequence. If it is a byte comparison, it must be a number.

• File-type

  If the test is successful, the file will print the value.

How to add file types for files