Create a group

• Create the shared group:

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sudo groupadd shared

Add a user

• Add user devops to the shared group:

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sudo usermod -a -G shared devops

For the changes to take effect, you need to log out and log back in as the devops user. You can verify with the command:

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groups

Change the group of a directory and its files

• Change the group of the wiki directory to shared:

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sudo chgrp -R shared wiki

Add write permissions for a group on a directory and its files

Add write w permissions for the user group on the wiki directory.

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sudo chmod -R g+w wiki