RHCSA RHCSA Linux System Administration 4

Question 1

Which command searches for all SUID binaries on the entire filesystem?

Accepted Answer

find / -perm -4000 -type f 2>/dev/null

Answer

-perm -4000 matches files where the SUID bit is set regardless of other permission bits.

Question 2

A cron job must run every 15 minutes. Which crontab expression is correct?

Accepted Answer

*/15 * * * * /script.sh

Answer

*/15 in the minute field means 'every 15 minutes' (0, 15, 30, 45).

Question 3

You need to configure autofs to automatically mount NFS shares under /misc. Which file controls the autofs master map?

Accepted Answer

/etc/auto.master

Answer

/etc/auto.master (or auto.master.d/) is the top-level map that points to indirect map files like /etc/auto.misc.

Question 4

Which command checks and repairs an ext4 filesystem on /dev/sdb1 (must be unmounted)?

Accepted Answer

fsck.ext4 -y /dev/sdb1

Answer

fsck.ext4 -y automatically answers yes to all repair prompts; the filesystem must be unmounted first.

Question 5

A process with PID 1234 is unresponsive. Which signal forcefully terminates it?

Accepted Answer

kill -9 1234

Answer

Signal 9 (SIGKILL) cannot be caught or ignored by the process and immediately terminates it.

RHCSA Exam Practice Test