Linux Fundamentals, Second Edition by Richard Blum

Author:Richard Blum
Language: eng
Format: mobi
ISBN: 9781284254891
Published: 2022-07-30T00:00:00+00:00

LISTING 10-2 Changing the file permissions owner.

Description

In Listing 10-2 , the g-w code in the chmod command indicates to remove the write permission for the group from the customers.txt file. Now members of the marketing group can only read the file.

You can combine letter codes for both to make multiple changes in a single chmod command, as shown in LISTING 10-3 .

LISTING 10-3 Combining permission changes.

Description

The ug code assigns the change to both the owner and the group, while the rwx code assigns the read, write, and execute permissions. The equal sign indicates to set those permissions.

The second mode available in chmod is called octal mode. With octal mode, the nine permission bits are represented as three octal numbers, one each for the owner, group, and other permissions. TABLE 10-2 shows how the octal number matches the three symbolic mode permissions.

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