linuxexpert-practice-labs/labs/rhcsa/10-2-default-file-permissions

RHCSA 10.2: Default file permissions

A umask for one user, and a default umask for everyone.

Before you start

The lab creates users alice and bob (password Lab-Pass-1), and notes the files in /etc/profile.d/ so reset can take out the ones you add.

Tasks

1. Make new files of user alice readable and writable only by her, persistently: su - alice -c 'umask; touch t; ls -l t' prints 0077 and -rw-------.
2. Make every user's new directories rwxr-x--- by default: for a user without their own umask line, su - bob -c 'umask; mkdir d; ls -ld d' prints 0027 and drwxr-x---. alice keeps her own umask.

Hints

• umask 077 in ~alice/.bashrc.
• umask 027 in a file in /etc/profile.d/ ending in .sh. Don't edit /etc/profile or /etc/bashrc.