261. What of the following tool is used to check and repair Linux file systems ?
A. mkfs
B. fdisk
C. fsck
D. mount
✅ The correct answer is option C.
Basic of linux unix MCQs
262. What command is used to copy directory structures in and out ?
A. copy
B. cp – p
C. cpio
D. cp
✅ The correct answer is option C.
263. Which command allows you to view your file 24 lines at a time ?
A. more
B. pg
C. cat
D. lp
✅ The correct answer is option B.
264. Which commands is used to assign executable permission to all of the files named “letter” ?
A. chmod ugo+r letter
B. chmod ugo+rw letter
C. chmod u+x letter
D. chmod ugo+x letter
✅ The correct answer is option D.
265. What command is used with vi editor to delete a single character ?
A. x
B. y
C. a
D. z
✅ The correct answer is option A.
266. Which command can force all buffers to disk ?
A. save
B. sync
C. edbuff
D. flush
✅ The correct answer is option B.
267. The physical layer of a network________________?
A. constructs packets of data and sends them across the network
B. controls error detection and correction
C. defines the electrical characteristics of signals passed between the computer and communication devices
D. All of the above
✅ The correct answer is option C.
268. Which of the following keys is used to delete the character beneath the cursor ?
A. x
B. X
C. dd
D. D
✅ The correct answer is option A.
269. In which tcp_wrappers file can you specify to allow all connections from all hosts ?
A. /etc/hosts.allow
B. /etc/hosts.deny
C. /etc/hosts
D. /etc/tcp.conf
✅ The correct answer is option A.
270. In Bourne shell, which file sets the Unix environment for the user when the logs into his HOME directory ?
A. .exrc
B. .profile
C. lastlogin
D. .mbox
✅ The correct answer is option B.