Which of the following Linux command is used to set values in environment variables?
setval
setenv
export
env
Correct Answer :
C. export
The export command is used to set values in environment variables.
Related Questions
Which of the following statements are the correct about XXXsort command?
a) This command is used to sort the content of a file in alphabetical order.
b) This command is used to sort the content of a file based on the column.
c) This command is used for numeric sorting bases on the column.
d) None of the Above.
Options:
A and B
A and C
A, B, and C
D
Which run-level is used with the init command to reboot the system?
0
1
4
6
Which option is used to assign permission to directory recursively?
-r
-R
-REC
-rec
Which of the following command is used to swap two lines in the vi editor?
sl
SL
DDP
ddp
What are interfaces are supported by the Linux operating system?
Graphical User Interface
Command Line Interface
Both of the above
None of the above
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 exact command is used to remove a user from the group in the Linux system?
delgroup d
remusr d
gpasswd -d
rm d
Which of the following command is used to copy a line in the vi editor?
CC
cc
YY
yy
Which exact command is used to list the files and directories along with hidden files?
ls -l
ls -k
ls -a
ls -n
Which exact command is used to remove a non-empty directory?
rmdir -removeall
rmdir -n
rmdir -rf
rmdir -ra
Which of the following are non-standard directories?
a) /lost+found
b) /var
c) /run
d) /cdrom
Options:
A and B
A and C
A, C, and D
A, B, C, and D
Which command is used to know about groups that belong to the current user?
grouplist
groups
groupinfo
groupinformation
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 of the following command is used to display the memory map of processes in the Linux system?
pmap
memmap
map
procmap
Which option is used in sort command, if we want to sort the content of the file based on a specific column number?
-c
-k
-n
-f
Which of the following command is used to display only directories that exist in the current directory?
ls l | grep ^d
ls | grep ^d
ls l | grep #d
ls l | grep *d
Which command is used to check network cable is plugged or not?
ifplugstatus
ifcableplug
ifcablestatus
isplugstatus
Which exact command is used to disable password for a particular user?
usermod -D
usermod -d
usermod -l
usermod -L
Which of the following character is used for execute permissions in the Linux operating system?
e
x
E
None
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
Which of the following command is used to delete scheduled tasks?
atrm
atdl
atdel
rmtask
Which of the following operator is used to execute multiple commands in a single line?
;
%
&&
||
Which of the following type of permissions are used for files and directories in the Linux Operating System?
a) Read
b) Write
c) Execute
d) All of the above
Options:
A and B
B and C
A and C
D
How to print lines of a given text file from line number 2 to 4 using AWK?
awk 'NR==2, NR==4 {print NR,$0}'
awk 'NR==2 to NR==4 {print NR,$0}'
awk 'NR==2-4 {print NR,$0}'
awk 'NR==2,4 {print NR,$0}'
Which of the following Linux command is used to print all environment variables?
printenv
env
envvars
envs
Why the double ampersands are used in a regular expression?
The double ampersands (&&) are used in regular expression for deleting the specified string.
The double ampersands (&&) are used in regular expression for replacing the specified string.
The double ampersands (&&) are used in regular expression for searching the specified string.
None of the above
Which of the following command is used to assign a new name to the Linux built commands?
newcmd
new
alias
aliasname
Which exact command is used to list the files and directories with group id and owner id instead of their names?
ls -l
ls -n
ls -k
ls -h
There are the following statements that are given below which of them are correct about traceroute in the Linux operating system?
a) It is a network troubleshooting command which is used to trace the number of hops is required for packets to reach the destination.
b) This command requires root privileges.
c) By default, it is not installed in the Linux system
d) All of the above
Options:
A and B
B and C
A and C
D
There are the following statements that are given below, which of them are correct about Linux File Hierarchy System?
a) The Linux File Hierarchy System is also known as Linux Root File System.
b) It is a standard that describes the directory and file structure in the operating system.
c) In different distributions of the Linux operating system, the File Hierarchy system can be a little bit different.
d) It describes where the files are located in the operating system.
Options:
A and B
C and D
B, C, and D
A, B, C, and D