A. write
B. mesg
C. mail
D. grep
✅ The correct answer is option D.
Basic of linux unix MCQs
What command is used to count the number of files in the current directory by using pipes ?
A. ls | ws – c
B. ls | wc – w
C. ls | wc – l
D. ls | wc
✅ The correct answer is option C.
The command chmod 761 note is equivalent to_________________?
A. chmod 167 note
B. chmod u=rwx, g=rw, o=x note
C. chmo a =761 note
D. chmod 4=7, g=6,0 =1 note
✅ The correct answer is option B.
Which of the following commands is used to list contents of directories ?
A. ls
B. lp
C. dir
D. tar
✅ The correct answer is option A.
To build a modularized kernel, the kernel-headers and kernel-source packages must first be installed. Where will you find the kernel-headers and kernel-source ?
A. /usr/local
B. /usr/src/linux
C. /usr/sre/redhat
D. /usr/bin
✅ The correct answer is option B.
What command is used to compare the files ?
A. ccp
B. du
C. cmp
D. comp
✅ The correct answer is option C.
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.
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.
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.
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.