Which of the following environment variables contains the path of the user's unique id?
UID
USERID
USRID
ID
Correct Answer :
A. UID
The UID environment variable contains the path of the unique id of a particular user.
Related Questions
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 of the following terminal command is used to send an email?
electronicmail
mailcmd
Which of the following command is used to move left in vi editor?
I
h
j
k
Which of the following directories does not take disk space?
a) /proc
b) /dev
c) /var
d) /home
Options:
A and B
A, B, and C
A, B, and D
A, B, C, and D
Which of the following command is used to add a key to the SSH agent?
agent
ssh-agent
add-key
ssh-add
What is the extension of compressed file generated by bzip2 command?
.zip2
.bz2
.b2
.z2
Which of the following commands are used to download files from a specified URL?
a) curl
b) wget
c) filedownload
d) All of the above
Options:
A and B
A and C
B and C
D
In Linux, the sed stands for?
String Editor
Stream Editor
Simple Editor
Single Editor
What are the basic components of the Linux operating system?
a) Kernel
b) Kernel Modules
c) Shared Libraries
d) User Programs
Options:
A and B
A, B, and C
B, C, and D
A, B, C, and D
Which of the following command is used to schedule tasks in the Linux system?
schedule
stask
at
ats
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
Which of the following command is used to undo the last command in the vi editor?
uu
x
X
u
Which directory contains grub configuration file?
/lib
/usr
/boot
/etc
Which Linux command is used to assign a password to the created user?
password
newpass
passwd
pwd
Which of the following command is used to assign a new name to the Linux built commands?
newcmd
new
alias
aliasname
There are the following statements that are given below, which of them are correct about touch command in Linux?
a) It is used to create empty files.
b) It is used to update the timestamp of the existing file.
c) It is used to write formatted data into the file.
d) It is used to view the content of the file.
Options:
A and B
B and C
A, B, and C
A, B, C, and D
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 commands are used to create files in the Linux Operating System?
a) cat
b) echo
c) touch
d) printf
Options:
A and B
C and D
A, B, and C
A, B, C, and D
Which exact command is used to assign all read, write and execute permission to all owners of a file?
chmod 7
chmod 777
chown 777
chgrp 777
Which of the following directories that contain the executable binary files that require root privileges to perform tasks?
/sbin
/lib
/bin
/opt
What is the full form of MTU?
Maximum Transmission Unit
Minimum Transmission Unit
Multiple Transmission Unit
Minimum Transactional Unit
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
There are the following statements that are given below, which of them are correct about Linux?
a) Linux is system software.
b) Linux is a multitasking operating system.
c) Linux was developed by Dennis Ritchie
d) Linux is an open-source operating system.
Options:
A and B
B and C
A, C, and D
A, B, and D
Which of the following command is used to view the content of the compressed file?
cat
gzip
zcat
zipcat
The scope of an environment variable can be?
Local
Global
Both
None
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
Which of the following command is used to print the 3rd column of a specified file?
awk '{print $3}
awk '{print $2}
awk '{print $N2}
awk '{print $N3}
Which command is used to get the path of the current directory?
cdir
dir
pwd
pdir
Which of the following redirection operator is used to append the content in a file?
>
<
>>
<>
Which exact command is used to display only matched data of two files?
comm -13
comm -23
comm -12
None of the above