RHCSA RHCSA File Permissions and ACLs 4

Question 1

User jane runs 'umask 077'. What permissions will a newly created directory have?

Accepted Answer

700

Answer

Directories have a base of 777; subtracting umask 077 yields 700 (rwx------).

Question 2

Which command recursively sets ownership of /var/www to user apache and group apache?

Accepted Answer

chown -R apache:apache /var/www

Answer

chown -R user:group path recursively changes both owner and group in one command.

Question 3

Which command copies the ACL from file source.txt and applies it to dest.txt?

Accepted Answer

getfacl source.txt | setfacl --set-file=- dest.txt

Answer

Piping getfacl output into setfacl --set-file=- is the standard method to transfer ACLs between files.

Question 4

A directory has permissions drwxrws---. What does the 's' in the group field indicate?

Accepted Answer

The setgid bit is set on the directory

Answer

An 's' in the group execute position indicates the setgid bit is set and the execute bit is also set.

Question 5

What happens when you run 'chmod u+s' on an executable binary?

Accepted Answer

The binary runs with the file owner's privileges regardless of who executes it

Answer

The setuid bit causes an executable to run with the file owner's UID rather than the caller's UID.

RHCSA Exam Practice Test