Which of the following command is used to undo the last command in the vi editor?
uu
x
X
u
Correct Answer :
D. u
The u command is used to undo the last command in the vi editor.
Related Questions
Which of the following directories contains configuration files?
a) /opt
b) /var
c) /boot
d) /etc
Options:
A and B
C and D
A, B, and D
A, B, C, and D
In which unit, time passed in sleep command by default?
Seconds
Minutes
Milliseconds
Microseconds
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 of the following command is used to repeat the last command in the vi editor?
Dot (.)
!
@
$
Which of the following command is used to display the path of a command in the Linux File System?
pcmd
which
pathcmd
None of the above
Which of the following is used to match any set of characters from the specified file in the grep command?
()
{}
[]
##
Which of the following option is used in grep command to search specific words from a file by ignoring case?
-a
-i
-c
-ing
Which Linux command is used to create an encrypted password?
encrypt passwd
secure passwd
openssl passwd
All the above
Which exact command is used, when we want to add execute permission to all owners of the file?
chmod all x
chmod ax
chmod a+x
None of the above
How to change the normal user to root user using the terminal in the Linux operating system?
Using sudo command
Using su command
Using super command
None of the above
dig stands for?
Domain Information Groper
Domain Instruction Gist
Double Instruction Groper
Double Information Groper
Which of the following command is used to display the calendar?
cal
calendar
calen
cln
Which command is used to see what permissions will be provided to the newly created file by default?
default
unmask
permissions
defperm
Which of the following character is used to identify the symbolic link file in the output of ls command?
s
c
l
_
Which of the following command is used to delete till the end of the line in the vi editor?
$
d$
d0
DD
How can we view and add content in the kernel ARP table?
arpmod
arpalter
arptable
arp
A Linux operating system supports?
a) Multitasking
b) Multiprogramming
c) Multiuser
d) Multithreading
Options:
A and C
A, C and D
A, B, and C
A, B, C, and D
Which of the following correct tasks that can be done by AWK?
a) We can scan a file line by line using AWK.
b) It is used to transform data files.
c) It is used to perform operations on matched lines.
d) We can produce formatted reports using AWK.
Options:
A and B
A, C, and D
A, B, and D
A, B, C, and D
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
Which of the following character is used for execute permissions in the Linux operating system?
e
x
E
None
Which directory contains grub configuration file?
/lib
/usr
/boot
/etc
What are the popular editors are used in the Linux operating system?
a) Vi
b) Vim
c) Gedit
d) Nano
Options:
A and B
C and D
A, B, and C
A, B, C, and D
What is the default UID of root user in the Linux operating system?
0
1
2
3
What operations are performed when a new user is created?
Creates a new home directory for the user
The ownership and permissions are assigned to the home directory
Both of the above
None of the above
Which exact command is used to disable password for a particular user?
usermod -D
usermod -d
usermod -l
usermod -L
Which exact command is used to down interface eth0 in the Linux operating system?
ifconfig down eth0
ifdown eth0
down eth0
ifconfig -d eth0
Which exact command is used to change from the current directory to the previous directory?
cd ..
cd ~
cd -
cd .
There are the following statements that are given below, which of them is correct about Linux kernel?
The kernel is the main part of the Linux root file system.
The kernel is a core part of OS, which acts as a bridge between hardware and user programs.
The kernel is one kind of shell used by system calls.
None of the above
Which of the following command uses regular expressions in the Linux operating system?
a) grep
b) sed
c) rename
d) bash
Options:
A and B
C and D
A, B, and C
A, B, C, and D
Which of the following command is used to start typing at the end of the current line in the vi editor?
A
a
o
O