Linux MCQ Test

1. Which command lists all files in the current directory?

• A. ls
• B. cd
• C. pwd
• D. cp

Answer: ls

2. What does the 'rm' command do?

• A. Move files
• B. Rename files
• C. List files
• D. Remove files

Answer: Remove files

3. What is the purpose of the 'cd' command in Linux?

• A. Copy files
• B. Change directories
• C. Delete files
• D. List files

Answer: Change directories

4. Which command displays the current working directory?

• A. ls
• B. cd
• C. pwd
• D. rm

Answer: pwd

5. How do you display the contents of a text file?

• A. mv
• B. cat
• C. ls
• D. cp

Answer: cat

6. What does the command 'chmod' change?

• A. File content
• B. File name
• C. File type
• D. File permissions

Answer: File permissions

7. Which command is used to copy files?

• A. mv
• B. ls
• C. cp
• D. rm

Answer: cp

8. What does the 'mkdir' command do?

• A. Makes a directory
• B. Moves files
• C. Deletes files
• D. Lists files

Answer: Makes a directory

9. What does the command 'df' display?

• A. File contents
• B. Process list
• C. Disk usage
• D. Memory usage

Answer: Disk usage

10. What does the 'ps' command do?

• A. Lists processes
• B. Changes permissions
• C. Shows directories
• D. Pings servers

Answer: Lists processes

11. Which command compares two files?

• A. cmp
• B. diff
• C. comm
• D. fc

Answer: cmp

12. Which command renames a file?

• A. cp
• B. mv
• C. ls
• D. rm

Answer: mv

13. How do you check free memory in Linux?

• A. mem
• B. top
• C. ps
• D. free

Answer: free

14. What does the 'touch' command do?

• A. Removes files
• B. Copies files
• C. Lists files
• D. Creates files

Answer: Creates files

15. What does the command 'kill' do?

• A. Lists files
• B. Terminates processes
• C. Shows memory
• D. Copies files

Answer: Terminates processes

16. Which symbol redirects output to a file?

• A. <
• B. |
• C. >
• D. &

Answer: >

17. What does 'grep' command do?

• A. Lists files
• B. Searches patterns
• C. Shows processes
• D. Copies files

Answer: Searches patterns

18. Which file contains user account information?

• A. /etc/shadow
• B. /etc/group
• C. /etc/passwd
• D. /etc/users

Answer: /etc/passwd

19. What does 'sudo' allow a user to do?

• A. List files
• B. Run as root
• C. Copy files
• D. Show processes

Answer: Run as root

20. Which command changes file ownership?

• A. chown
• B. chmod
• C. chgrp
• D. chattr

Answer: chown

21. What is the root user's home directory?

• A. /home/root
• B. /usr/root
• C. /etc/root
• D. /root

Answer: /root

22. Which command displays network configuration?

• A. ifconfig
• B. netstat
• C. route
• D. ip

Answer: ifconfig

23. How do you search for a file in Linux?

• A. search
• B. locate
• C. grep
• D. find

Answer: find

24. Which command lists open files?

• A. openfiles
• B. files
• C. lsof
• D. psf

Answer: lsof

25. What command shows disk usage by directory?

• A. disk
• B. space
• C. df
• D. du

Answer: du

26. What is the purpose of /etc directory?

• A. User files
• B. Configuration files
• C. System binaries
• D. Temporary files

Answer: Configuration files

27. What does 'uname -r' display?

• A. User info
• B. System info
• C. Host info
• D. Kernel version

Answer: Kernel version

28. What does 'tar' command do?

• A. Archives files
• B. Lists files
• C. Copies files
• D. Moves files

Answer: Archives files

29. Which command creates a symbolic link?

• A. symlink
• B. link
• C. ln -s
• D. newlink

Answer: ln -s

30. What is 'nano' in Linux?

• A. Text editor
• B. File manager
• C. Process viewer
• D. Network tool

Answer: Text editor

31. What does 'hostname' show?

• A. IP address
• B. Domain name
• C. System name
• D. User name

Answer: System name

32. Which command views system logs?

• A. viewlog
• B. dmesg
• C. logview
• D. syslog

Answer: dmesg

33. Which command checks filesystem?

• A. syscheck
• B. diskcheck
• C. fsck
• D. chkdsk

Answer: fsck

34. What does 'echo' command do?

• A. Read text
• B. Display text
• C. Copy text
• D. Move text

Answer: Display text

35. What does 'ping' command test?

• A. Network connectivity
• B. Disk speed
• C. Memory usage
• D. CPU load

Answer: Network connectivity

36. Which command starts system services?

• A. systemctl start
• B. service up
• C. init start
• D. daemon up

Answer: systemctl start

37. How do you become superuser?

• A. admin
• B. root
• C. super
• D. su

Answer: su

38. Which command shows current user?

• A. whoami
• B. user
• C. who
• D. me

Answer: whoami

39. Which command displays network connections?

• A. netinfo
• B. ipconfig
• C. ifconfig
• D. netstat

Answer: netstat

40. What is swap space used for?

• A. File storage
• B. Temp files
• C. Virtual memory
• D. Log files

Answer: Virtual memory

41. Which command shows process memory usage?

• A. free
• B. top
• C. ps
• D. mem

Answer: top

42. What clears the terminal screen?

• A. cls
• B. clear
• C. clean
• D. clscreen

Answer: clear

43. Which command shows file end?

• A. end
• B. last
• C. tail
• D. EOF

Answer: tail

44. What does 'man' command provide?

• A. Management
• B. Maintenance
• C. Manifesto
• D. Manual

Answer: Manual

45. What does 'passwd' command do?

• A. Show password
• B. Change password
• C. Remove password
• D. List passwords

Answer: Change password

46. What compresses files in Linux?

• A. compress
• B. zip
• C. archive
• D. gzip

Answer: gzip

47. Which key combination ends process?

• A. Ctrl+X
• B. Ctrl+D
• C. Ctrl+C
• D. Ctrl+Z

Answer: Ctrl+C

48. Which command shows directory structure?

• A. tree
• B. dir
• C. ls
• D. show

Answer: tree

49. Which command shows calendar?

• A. cal
• B. date
• C. time
• D. day

Answer: cal

50. What does 'locate' command do?

• A. List files
• B. Find files
• C. Show files
• D. Copy files

Answer: Find files

51. What does 'which' command show?

• A. File type
• B. File size
• C. File owner
• D. File location

Answer: File location

52. Which directory holds system logs?

• A. /usr/log
• B. /etc/log
• C. /var/log
• D. /log

Answer: /var/log

53. What does 'diff' command do?

• A. Copy files
• B. Compare files
• C. Move files
• D. Delete files

Answer: Compare files

54. Which command counts words?

• A. count
• B. num
• C. wc
• D. words

Answer: wc

55. What does 'less' command do?

• A. Delete text
• B. Copy text
• C. Move text
• D. View text

Answer: View text

56. Which command shows disk partitions?

• A. fdisk -l
• B. part
• C. disk
• D. show

Answer: fdisk -l

57. Which command shows USB devices?

• A. lsusb
• B. usb
• C. devices
• D. show

Answer: lsusb

58. What does 'adduser' do?

• A. Delete user
• B. Create user
• C. Modify user
• D. Show user

Answer: Create user

59. Which command creates archives?

• A. zip
• B. compress
• C. tar
• D. archive

Answer: tar

60. What does 'uniq' command show?

• A. All lines
• B. Sort lines
• C. Count lines
• D. Unique lines

Answer: Unique lines

61. What does 'head' command show?

• A. Last lines
• B. First lines
• C. Middle lines
• D. All lines

Answer: First lines

62. Which command shows CPU info?

• A. lscpu
• B. cpu
• C. proc
• D. system

Answer: lscpu

63. Which command schedules tasks?

• A. schedule
• B. task
• C. cron
• D. time

Answer: cron

64. What does 'chgrp' change?

• A. User access
• B. File access
• C. Time access
• D. Group access

Answer: Group access

65. Which command shows PCI devices?

• A. lspci
• B. pci
• C. devices
• D. hardware

Answer: lspci

66. Which command shows environment?

• A. show
• B. vars
• C. env
• D. system

Answer: env

67. What does 'killall' affect?

• A. One process
• B. Some processes
• C. Few processes
• D. All processes

Answer: All processes

68. What does 'umount' do?

• A. Create mount
• B. Unmount filesystem
• C. Show mounts
• D. List mounts

Answer: Unmount filesystem

69. What does 'wget' do?

• A. Send files
• B. Download files
• C. List files
• D. Delete files

Answer: Download files

70. Which key shows command history?

• A. Up arrow
• B. Down arrow
• C. Left arrow
• D. Right arrow

Answer: Up arrow

71. Which command checks memory?

• A. check
• B. meminfo
• C. free
• D. memory

Answer: free

72. What does 'rmdir' remove?

• A. Files
• B. Links
• C. Archives
• D. Directories

Answer: Directories

73. Which command shows file type?

• A. what
• B. type
• C. file
• D. show

Answer: file

74. Which command shows block devices?

• A. lsblk
• B. block
• C. devices
• D. show

Answer: lsblk

75. What does 'at' command do?

• A. Shows time
• B. Lists jobs
• C. Runs now
• D. Schedules jobs

Answer: Schedules jobs

76. What does 'usermod' do?

• A. Create user
• B. Modify user
• C. Delete user
• D. Show user

Answer: Modify user

77. What does 'sort' do?

• A. Count lines
• B. Sort lines
• C. Delete lines
• D. Copy lines

Answer: Sort lines

78. Which signal terminates process?

• A. SIGTERM
• B. SIGKILL
• C. SIGSTOP
• D. SIGCONT

Answer: SIGTERM

79. Which command shows load average?

• A. load
• B. average
• C. uptime
• D. system

Answer: uptime

80. What does 'nl' command do?

• A. New line
• B. Next line
• C. Null line
• D. Number lines

Answer: Number lines

81. Which directory holds temporary files?

• A. /tmp
• B. /temp
• C. /t
• D. /temporary

Answer: /tmp

82. Which command shows printer queue?

• A. printers
• B. queue
• C. lpq
• D. print

Answer: lpq

83. What does 'tee' command do?

• A. Delete output
• B. Split output
• C. Move output
• D. Join output

Answer: Split output

84. What does 'fmt' command do?

• A. Delete text
• B. Copy text
• C. Move text
• D. Format text

Answer: Format text

85. What does 'join' command do?

• A. Split files
• B. Copy files
• C. Move files
• D. Merge files

Answer: Merge files

86. Which command shows system time?

• A. date
• B. time
• C. clock
• D. now

Answer: date

87. What does 'cut' command do?

• A. Join fields
• B. Extract fields
• C. Delete fields
• D. Copy fields

Answer: Extract fields

88. Which command shows routing table?

• A. routing
• B. path
• C. route
• D. network

Answer: route

89. What does 'logger' do?

• A. Delete logs
• B. Add log entries
• C. Show logs
• D. Clear logs

Answer: Add log entries

90. Which file sets system hostname?

• A. /etc/hostname
• B. /etc/name
• C. /etc/host
• D. /etc/system

Answer: /etc/hostname

91. Which command shows shared memory?

• A. memory
• B. shared
• C. ipcs
• D. show

Answer: ipcs

92. What does 'expand' command do?

• A. Compress text
• B. Delete spaces
• C. Remove tabs
• D. Convert tabs

Answer: Convert tabs

93. Which command creates backup?

• A. copy
• B. save
• C. backup
• D. archive

Answer: backup

94. What does 'basename' show?

• A. Directory name
• B. File name
• C. Full path
• D. Link name

Answer: File name

95. Which command shows system messages?

• A. dmesg
• B. messages
• C. syslog
• D. log

Answer: dmesg

96. What does 'sed' command do?

• A. Sort text
• B. Copy text
• C. Move text
• D. Edit text

Answer: Edit text

97. What does 'comm' command do?

• A. Combine files
• B. Copy files
• C. Move files
• D. Compare files

Answer: Compare files

98. What does 'ftp' command do?

• A. Copy local
• B. Transfer files
• C. Move files
• D. Delete files

Answer: Transfer files

99. Which command displays file differences?

• A. cmp
• B. comp
• C. diff
• D. compare

Answer: diff

100. Which command executes commands periodically?

• A. watch
• B. monitor
• C. observe
• D. track

Answer: watch