Which of the following command is used to remove an existing alias?
rmalias
unalias
delalias
ralials
Correct Answer :
B. unalias
The unalias command is used to remove an existing alias.
Related Questions
Which of the following command is used to swap two lines in the vi editor?
sl
SL
DDP
ddp
In which year vi editor was developed?
1976
1980
1982
1988
Which of the following command is used to print the number of lines that exist in the specified file?
awk 'END { print NL }'
awk 'END { print N }'
awk 'END { print NR }'
awk 'END { print NN }'
There are the following statements that are given below, which of them are correct about Linux shell?
a) Linux shell is a part of Linux kernel.
b) Linux shell provides an environment to execute commands.
c) Linux shell is used to execute scripts.
d) Linux shell is used to operate GPIO pins in the kernel.
Options:
A and B
B and C
A, B, and C
A, B, C, and D
Which command is used to check network cable is plugged or not?
ifplugstatus
ifcableplug
ifcablestatus
isplugstatus
There are the following statements that are given below, which of them are correct about environment variables in Linux operating system?
a) The environment variables are used to store some values that can be used by the application.
b) The environment variables are used to customize the behavior of the applications.
c) The environment variables can impact the performance of the system.
d) The environment variable used a % symbol for variables.
Options:
A and B
C and D
A, B, and C
B, C, and D
Which of the following command is used to copy a line in the vi editor?
CC
cc
YY
yy
Which of the following directories that contain the shared libraries in the Linux System?
/sbin
/lib
/bin
/opt
Which command is used to copy a file from one location to another location?
copy
copyfile
cp
None of the above
Which Linux command is used to un-mount the external storage devices from the Linux file system?
unmount
umount
nmount
None of the above
Which exact command is used to print lines of the file that are not matching to the specific word?
grep -v
grep -i
grep -k
grep -n
Which of the following directory contains the scripts related to service used in the Linux operating system?
/etc/services/
/etc/scripts/
/etc/init.d/
/etc/services/scripts/
Which of the following command is used to configure a public key at the SSH server for a user?
ssh-copy-id
ssh-public-key
ssh-public-id
ssh-copy-key
Which of the following configuration file is used by updatedb command?
/etc/db.conf
/etc/locatedb.conf
/etc/updatedb.conf
/etc/update.conf
Which command is used to rename the existing group?
rename
rengroup
groupmode
groupmod
Which of the following command is used to move up in the vi editor?
I
h
j
k
Which of the following terminal command is used to send an email?
electronicmail
mailcmd
Which of the following command is used to change the permissions of a file?
chperm
chmod
chown
permission
Which of the following statements are the correct about XXXsed command?
a) The sed command is used to display modified data on the console screen, actual data in the file remain the same.
b) The sed command is used to modify the data of a file permanently.
c) The regular expressions are used to display modified data of a file in the sed command.
d) The sed command does not use regular expressions.
Options:
A and C
A and D
B and C
B and D
There are the following statements that are given below, which of them are correct about Wildcards in the Linux operating system?
a) Wildcards are the string patterns that contain some special characters.
b) Wildcards are used to perform actions on one or more file that uses the same pattern.
c) Linux shell used wildcard characters for globbing.
d) All the above
Options:
A and B
A and C
A, B, and C
D
Which exact command is used to see the calendar of the year 2020?
cal 2020
cal -y 2020
calendar 2020
None of the above
There are the following statements that are given below which of them are correct about the ss command in the Linux operating system?
a) The ss command is the replacement for the netstat command.
b) It is faster than the netstat command.
c) We can display all UDP and TCP socket connections using ss command.
d) The ss can display all TCP socket connections only.
Options:
A and B
A and C
A, B, and C
A, B, and D
Which Linux command is used to assign a password to the created user?
password
newpass
passwd
pwd
Which of the following operator is used to comment lines in a shell script file?
//
\
/**/
#
In the cut command, a delimiter can be?
a) Hyphen
b) Space
c) Slash
d) All of the above
Options:
A
B
C
D
How can we shut down the system by notifying all users?
Using init 0 command
Using init 6 command
Using shutdown command
Using turnoff command
Which of the following commands are external commands in the Linux operating system?
a) cat
b) file
c) help
d) man
Options:
A and B
C and D
A, B, and D
A, B, C, and D
Which command is used to enable/disable password for a particular user?
usermod
userenable
userdisable
change
Which exact command is used to display only matched data of two files?
comm -13
comm -23
comm -12
None of the above
Which of the following directories contains binary files?
a) /sbin
b) /lib
c) /bin
d) /var
Options:
A and B
A and C
A, B, and C
A, B, C, and D