1. What command is used to count the total number of lines, words, and characters contained in a file?
Correct : C. wc
2. What command is used to remove files?
Correct : B. rm
3. What command is used to remove the directory?
Correct : D. rmdir
4. What command is used with vi editor to delete a single character?
Correct : A. x
5. What hardware architectures are not supported by Red Hat?
Correct : D. Macintosh
6. How can you add Amit, a new user, to your system?
Correct : D. All of the above
7. How could you install the file ipchains-1.3.9-5.i386.rpm?
Correct : C. rpm -i ipchains* .i386.rpm
8. What does FSF stand for?
Correct : D. Free Software Foundation
9. What command do you use to create Linux file systems?
Correct : B. mkfs
10. Which of the following command can you execute to count the number of lines in a file?
Correct : B. wc - l
11. Which of the following is not a communication command?
Correct : A. grep
12. What command is used to display the characteristics of a process?
Correct : B. ps
13. What command is used to list only the files chap0l, chap02 and chap04?
Correct : C. ls - x chap0[124]
14. What command is used with vi editor to replace text from cursor to right
Correct : C. R
15. What command is used to sort the lines of data in a file in alphabetical order?
Correct : D. sort
16. What command is used with vi editor to save file and remain in the editing mode?
Correct : C. :w
17. What command is used with vi editor to move back to the beginning of a word?
Correct : D. b
18. What command is used with vi editor to search a pattern in the forward direction?
Correct : D. /
19. What command is used to add printing jobs to the queue?
Correct : B. Lpr
20. What protocol(s) is(are) allowed a user to retrieve her/his mail from the mail server to her/his mail reader?
Correct : A. POP3
21. What project is currently developing X server support?
Correct : A. XFree86 Project, Inc.
22. What X-based tool is available for configuring the X Window system?
Correct : B. XF86Setup
23. Which of the following server is used with the BIND package?
Correct : D. named
24. What port does squid listen, by default?
Correct : D. 3128
25. Which of the following is the main Apache configuration file?
Correct : C. /etc/httpd/conf/httpd.conf
26. Which of the following command is used to access an SMB share on a Linux system?
Correct : C. smbclient
27. Which of the following command is used to see the services running in NFS server?
Correct : A. rpcinfo
28. In which tcp_wrappers file can you specify to allow all connections from all hosts?
Correct : A. /etc/hosts.allow
29. What does GNU stand for?
Correct : A. GNU's not Unix
30. What command is used to remove jobs from the print queue?
Correct : C. lprm
31. How can you navigate around virtual consoles?
Correct : A. Alt+Function Key
32. Which of the following NIS clients, finds and stores information about an NIS domain and server?
Correct : B. ypbind
33. RPM
Correct : A. stands for Red Hat Package Manager
34. What command is used to query for a specific package with RPM?
Correct : A. rpm -q
35. Who founded the Linux Kernel?
Correct : D. Linus Torvalds
36. _____ tool allows you to change your default X Window desktop.
Correct : C. switchdesk
37. In what file can you specify which users are not allowed to access a system via FTP?
Correct : A. /etc/ftpusers
38. Which program is used to schedule particular jobs or programs at particular times on the system?
Correct : D. cron
39. The location of some system configuration and system administrator executable files, is:
Correct : D. /sbin
40. The location for subdirectories for local programs and executables for user and administrative commands, is:
Correct : A. /usr
41. Which of the following is not a filter command?
Correct : D. cat
42. What command is used to assign executable permission to all of the files named "report"?
Correct : A. chmod ugo + x report
43. What command is used to change the working directory?
Correct : D. cd
44. What command is used to count just the number of characters in a file?
Correct : C. wc - c
45. What command can be used to get information about yourself?
Correct : D. who am i
46. Which of the following subdirectory(ies) contains the device files?
Correct : A. /dev
47. Which of the following subdirectory(ies) contains the system configuration scripts.
Correct : C. /etc
48. What of the following tool is used to check and repair Linux file systems?
Correct : C. fsck
49. Which of the following is the main Apache configuration file?
Correct : A. httpd.conf
50. What command is used to display and create files?
Correct : D. cat
51. Which of the following command can be used to rename a file in LINUX?
Correct : B. mv
52. What command is used to remove a file?
Correct : C. rm
53. What command is used to display the top of the file?
Correct : C. head
54. What command is used to sort the lines of data in a file in reverse order?
Correct : A. sort - r
55. What command is used to print a file?
Correct : A. lp
56. The command chmod 761 letter is equivalent to
Correct : C. chmod u = rwx, g = rw, o = x letter
57. What command is used with vi editor to move forward to the end of a word?
Correct : D. e
58. The IP address are based on
Correct : B. 32-bit addresses
59. Which daemon is used for the Apache server?
Correct : B. httpd
60. Who founded the FSF?
Correct : B. Richard Stallman
61. What command is used to copy a file?
Correct : C. cp
62. What command is used to display your current working directory?
Correct : B. pwd
63. What command is used with vi editor to move the cursor to the left?
Correct : A. h
64. Which of the following command is used to mount NFS filesystems?
Correct : C. mount
65. You just added a new user, kara, to the system. What group is kara added to by default?
Correct : B. kara
66. Which of the following command lists the last 10 lines of a file?
Correct : B. tail
67. What command is used to terminate a process?
Correct : A. kill
68. What command is used with vi editor to delete three words?
Correct : B. 3 dw
69. What command is used to assign only read permission to all three categories of the file'letter'?
Correct : B. chmod ugo = r letter
70. What command is used with file named 'letter' to remove the executable permission from the user and assign read permission to the group and others?
Correct : D. chmod u - x, go + r letter
71. What command is used to assign executable permission to the owner of the file named "letter"?
Correct : B. chmod u + x letter
72. What command is used to summarize the disk usage?
Correct : B. du
73. What command is used to list the jobs currently in print queues?
Correct : A. lpq
74. What is the following syntax used for command 2> /dev/null
Correct : D. Send error messages from command to a file called /dev/null
75. How do you delete your crontab entry?
Correct : C. crontab -r
76. How do you create a crontab entry?
Correct : C. crontab -e
77. How would you display running httpd processes?
Correct : A. ps -C httpd
78. How would you avoid accidentally removing files?
Correct : A. rm -i
79. How would you search for the string clothes at the end of the line in a file called shopping?
Correct : C. grep 'clothes$' shopping
80. Which runlevel allows full multiuser mode but with no graphical login manager?
Correct : C. Runlevel 3
81. How would you sort a file called shopping on column 3?
Correct : B. sort -k 3 shopping
82. How do you run a job that will continue running even if you are logged out?
Correct : D. nohup command
83. What is the following syntax used for? command >file1 2>file2
Correct : A. Send command's standard output to file1,and its standard error to file2
84. What does the 2>&1 at the end of the following command mean?find / -name fred.txt > names 2>&1
Correct : C. Send standard error to the same place as standard output
85. Which command is used to unmount a filesystem?
Correct : D. umount
86. Which file determines what will be run at each runlevel?
Correct : D. /etc/inittab
87. What is the full path for grub's configuration file
Correct : B. /boot/grub/menu.lst
88. How do you display the kernel release?
Correct : B. uname -r
89. What does the permission string rwxr-xr-- correspond with in octal?
Correct : B. 754
90. How do you display your current crontab entry?
Correct : D. crontab -l
91. How do you see hidden files in your home directory?
Correct : B. ls -la
92. How do you direct the shell to execute a command in the background?
Correct : A. Put an & symbol at the end of the command line.
93. What keyboard combination can be used to exit the shell?
Correct : C. Ctrl+D
94. What is the purpose of the following operator? >>
Correct : D. It appends data to a file without overwriting it.
95. How would you remove a directory that is not empty?
Correct : A. rm -r
96. To display information about the processor itself - display the contents of which file?
Correct : D. /proc/cpuinfo
97. To run date first, and then ls -l, which of the following is correct?
Correct : B. date ; ls -l
98. Which file is the list of commands you recently entered stored in?
Correct : C. .bash_history
99. Which of the following runs the last command you entered?
Correct : C. !!
100. What is the shortest command to take you to your home directory?
Correct : C. cd
shopping"},{"@type": "Answer", "text": "grep 'clothes^' shopping"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 79",
"text": "Which runlevel allows full multiuser mode but with no graphical login manager?",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "Runlevel 3"
},
"option": [{"@type": "Answer", "text": "Runlevel 1"},{"@type": "Answer", "text": "Runlevel 2"},{"@type": "Answer", "text": "Runlevel 3"},{"@type": "Answer", "text": "Runlevel 0"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
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"acceptedAnswer": {
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"text": "sort -k 3 shopping"
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"option": [{"@type": "Answer", "text": "sort -n 3 shopping"},{"@type": "Answer", "text": "sort -k 3 shopping"},{"@type": "Answer", "text": "sort -c 3 shopping"},{"@type": "Answer", "text": "sort -c3 shopping"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 81",
"text": "How do you run a job that will continue running even if you are logged out?",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "nohup command"
},
"option": [{"@type": "Answer", "text": "hup.out command"},{"@type": "Answer", "text": "hup command"},{"@type": "Answer", "text": "jobc command"},{"@type": "Answer", "text": "nohup command"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 82",
"text": "What is the following syntax used for? command >file1 2>file2",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "Send command's standard output to file1,and its standard error to file2"
},
"option": [{"@type": "Answer", "text": "Send command's standard output to file1,and its standard error to file2"},{"@type": "Answer", "text": "Send command's standard error to file1, and its standard output to file2"},{"@type": "Answer", "text": "Send command's standard error to file1, and its standard input to file2"},{"@type": "Answer", "text": "Send command's standard input to file1,and its standard output to file2"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 83",
"text": "What does the 2>&1 at the end of the following command mean?find / -name fred.txt > names 2>&1",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "Send standard error to the same place as standard output"
},
"option": [{"@type": "Answer", "text": "Send standard error to a file called &1"},{"@type": "Answer", "text": "Append standard error to a file called &1"},{"@type": "Answer", "text": "Send standard error to the same place as standard output"},{"@type": "Answer", "text": "Send the output of the find command to /dev/null"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 84",
"text": "Which command is used to unmount a filesystem?",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "umount"
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"option": [{"@type": "Answer", "text": "dmount"},{"@type": "Answer", "text": "dismount"},{"@type": "Answer", "text": "unmount"},{"@type": "Answer", "text": "umount"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 85",
"text": "Which file determines what will be run at each runlevel?",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "/etc/inittab"
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"option": [{"@type": "Answer", "text": "/etc/init/runlevels"},{"@type": "Answer", "text": "/etc/levels/fstab"},{"@type": "Answer", "text": "/etc/fstab"},{"@type": "Answer", "text": "/etc/inittab"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 86",
"text": "What is the full path for grub's configuration file",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "/boot/grub/menu.lst"
},
"option": [{"@type": "Answer", "text": "/boot/grub/lsof.conf"},{"@type": "Answer", "text": "/boot/grub/menu.lst"},{"@type": "Answer", "text": "/etc/grub/grub.conf"},{"@type": "Answer", "text": "/etc/grub/grub.txt"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 87",
"text": "How do you display the kernel release?",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "uname -r"
},
"option": [{"@type": "Answer", "text": "kernel -r"},{"@type": "Answer", "text": "uname -r"},{"@type": "Answer", "text": "cat /proc/etc/kernel/release"},{"@type": "Answer", "text": "cat /etc/config/kernel/release"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 88",
"text": "What does the permission string rwxr-xr-- correspond with in octal?",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "754"
},
"option": [{"@type": "Answer", "text": "742"},{"@type": "Answer", "text": "754"},{"@type": "Answer", "text": "724"},{"@type": "Answer", "text": "624"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 89",
"text": "How do you display your current crontab entry?",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "crontab -l"
},
"option": [{"@type": "Answer", "text": "crontab -display"},{"@type": "Answer", "text": "crontab -d"},{"@type": "Answer", "text": "list --crontab"},{"@type": "Answer", "text": "crontab -l"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 90",
"text": "How do you see hidden files in your home directory?",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "ls -la"
},
"option": [{"@type": "Answer", "text": "ls -h"},{"@type": "Answer", "text": "ls -la"},{"@type": "Answer", "text": "ls -hn"},{"@type": "Answer", "text": "ls -R"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 91",
"text": "How do you direct the shell to execute a command in the background?",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "Put an & symbol at the end of the command line."
},
"option": [{"@type": "Answer", "text": "Put an & symbol at the end of the command line."},{"@type": "Answer", "text": "Key in fg followed by the command name."},{"@type": "Answer", "text": "Press Ctrl+c after you have keyed in the command."},{"@type": "Answer", "text": "Press Ctrl+d after you have keyed in the command."}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 92",
"text": "What keyboard combination can be used to exit the shell?",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "Ctrl+D"
},
"option": [{"@type": "Answer", "text": "Ctrl+E"},{"@type": "Answer", "text": "Ctrl+C"},{"@type": "Answer", "text": "Ctrl+D"},{"@type": "Answer", "text": "Ctrl+Z"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 93",
"text": "What is the purpose of the following operator? >>",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "It appends data to a file without overwriting it."
},
"option": [{"@type": "Answer", "text": "It is used to send the output of one command so it becomes the input of a second command."},{"@type": "Answer", "text": "It is used to send both input and output to the same file."},{"@type": "Answer", "text": "It is used to overwrite the contents of a file."},{"@type": "Answer", "text": "It appends data to a file without overwriting it."}],
"eduQuestionType": "Multiple choice"
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"@type": "Question",
"name": "Question 94",
"text": "How would you remove a directory that is not empty?",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "rm -r"
},
"option": [{"@type": "Answer", "text": "rm -r"},{"@type": "Answer", "text": "rm -f"},{"@type": "Answer", "text": "rmdir -f"},{"@type": "Answer", "text": "rmdir -le"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 95",
"text": "To display information about the processor itself - display the contents of which file?",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": "/proc/cpuinfo"
},
"option": [{"@type": "Answer", "text": "/bin/cpu"},{"@type": "Answer", "text": "/dev/cpuinfo"},{"@type": "Answer", "text": "/etc/cpu"},{"@type": "Answer", "text": "/proc/cpuinfo"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 96",
"text": "To run date first, and then ls -l, which of the following is correct?",
"answerCount": 4,
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"@type": "Answer",
"text": "date ; ls -l"
},
"option": [{"@type": "Answer", "text": "date $ ls -l"},{"@type": "Answer", "text": "date ; ls -l"},{"@type": "Answer", "text": "date - ls -l"},{"@type": "Answer", "text": "date > ls -l"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
"name": "Question 97",
"text": "Which file is the list of commands you recently entered stored in?",
"answerCount": 4,
"acceptedAnswer": {
"@type": "Answer",
"text": ".bash_history"
},
"option": [{"@type": "Answer", "text": ".bashrc_history"},{"@type": "Answer", "text": ".history"},{"@type": "Answer", "text": ".bash_history"},{"@type": "Answer", "text": ".bash_list_history"}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
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"text": "Which of the following runs the last command you entered?",
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"acceptedAnswer": {
"@type": "Answer",
"text": "!!"
},
"option": [{"@type": "Answer", "text": "~!"},{"@type": "Answer", "text": "!~"},{"@type": "Answer", "text": "!!"},{"@type": "Answer", "text": ".."}],
"eduQuestionType": "Multiple choice"
},{
"@type": "Question",
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"text": "What is the shortest command to take you to your home directory?",
"answerCount": 4,
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"@type": "Answer",
"text": "cd"
},
"option": [{"@type": "Answer", "text": "cd ~"},{"@type": "Answer", "text": "cd $HOME"},{"@type": "Answer", "text": "cd"},{"@type": "Answer", "text": "."}],
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Quiznetik
Linux Operating System | Set 1
1. What command is used to count the total number of lines, words, and characters contained in a file?
Correct : C. wc
2. What command is used to remove files?
Correct : B. rm
3. What command is used to remove the directory?
Correct : D. rmdir
4. What command is used with vi editor to delete a single character?
Correct : A. x
5. What hardware architectures are not supported by Red Hat?
Correct : D. Macintosh
6. How can you add Amit, a new user, to your system?
Correct : D. All of the above
7. How could you install the file ipchains-1.3.9-5.i386.rpm?
Correct : C. rpm -i ipchains* .i386.rpm
8. What does FSF stand for?
Correct : D. Free Software Foundation
9. What command do you use to create Linux file systems?
Correct : B. mkfs
10. Which of the following command can you execute to count the number of lines in a file?
Correct : B. wc - l
11. Which of the following is not a communication command?
Correct : A. grep
12. What command is used to display the characteristics of a process?
Correct : B. ps
13. What command is used to list only the files chap0l, chap02 and chap04?
Correct : C. ls - x chap0[124]
14. What command is used with vi editor to replace text from cursor to right
Correct : C. R
15. What command is used to sort the lines of data in a file in alphabetical order?
Correct : D. sort
16. What command is used with vi editor to save file and remain in the editing mode?
Correct : C. :w
17. What command is used with vi editor to move back to the beginning of a word?
Correct : D. b
18. What command is used with vi editor to search a pattern in the forward direction?
Correct : D. /
19. What command is used to add printing jobs to the queue?
Correct : B. Lpr
20. What protocol(s) is(are) allowed a user to retrieve her/his mail from the mail server to her/his mail reader?
Correct : A. POP3
21. What project is currently developing X server support?
Correct : A. XFree86 Project, Inc.
22. What X-based tool is available for configuring the X Window system?
Correct : B. XF86Setup
23. Which of the following server is used with the BIND package?
Correct : D. named
24. What port does squid listen, by default?
Correct : D. 3128
25. Which of the following is the main Apache configuration file?
Correct : C. /etc/httpd/conf/httpd.conf
26. Which of the following command is used to access an SMB share on a Linux system?
Correct : C. smbclient
27. Which of the following command is used to see the services running in NFS server?
Correct : A. rpcinfo
28. In which tcp_wrappers file can you specify to allow all connections from all hosts?
Correct : A. /etc/hosts.allow
29. What does GNU stand for?
Correct : A. GNU's not Unix
30. What command is used to remove jobs from the print queue?
Correct : C. lprm
31. How can you navigate around virtual consoles?
Correct : A. Alt+Function Key
32. Which of the following NIS clients, finds and stores information about an NIS domain and server?
Correct : B. ypbind
33. RPM
Correct : A. stands for Red Hat Package Manager
34. What command is used to query for a specific package with RPM?
Correct : A. rpm -q
35. Who founded the Linux Kernel?
Correct : D. Linus Torvalds
36. _____ tool allows you to change your default X Window desktop.
Correct : C. switchdesk
37. In what file can you specify which users are not allowed to access a system via FTP?
Correct : A. /etc/ftpusers
38. Which program is used to schedule particular jobs or programs at particular times on the system?
Correct : D. cron
39. The location of some system configuration and system administrator executable files, is:
Correct : D. /sbin
40. The location for subdirectories for local programs and executables for user and administrative commands, is:
Correct : A. /usr
41. Which of the following is not a filter command?
Correct : D. cat
42. What command is used to assign executable permission to all of the files named "report"?
Correct : A. chmod ugo + x report
43. What command is used to change the working directory?
Correct : D. cd
44. What command is used to count just the number of characters in a file?
Correct : C. wc - c
45. What command can be used to get information about yourself?
Correct : D. who am i
46. Which of the following subdirectory(ies) contains the device files?
Correct : A. /dev
47. Which of the following subdirectory(ies) contains the system configuration scripts.
Correct : C. /etc
48. What of the following tool is used to check and repair Linux file systems?
Correct : C. fsck
49. Which of the following is the main Apache configuration file?
Correct : A. httpd.conf
50. What command is used to display and create files?
Correct : D. cat
51. Which of the following command can be used to rename a file in LINUX?
Correct : B. mv
52. What command is used to remove a file?
Correct : C. rm
53. What command is used to display the top of the file?
Correct : C. head
54. What command is used to sort the lines of data in a file in reverse order?
Correct : A. sort - r
55. What command is used to print a file?
Correct : A. lp
56. The command chmod 761 letter is equivalent to
Correct : C. chmod u = rwx, g = rw, o = x letter
57. What command is used with vi editor to move forward to the end of a word?
Correct : D. e
58. The IP address are based on
Correct : B. 32-bit addresses
59. Which daemon is used for the Apache server?
Correct : B. httpd
60. Who founded the FSF?
Correct : B. Richard Stallman
61. What command is used to copy a file?
Correct : C. cp
62. What command is used to display your current working directory?
Correct : B. pwd
63. What command is used with vi editor to move the cursor to the left?
Correct : A. h
64. Which of the following command is used to mount NFS filesystems?
Correct : C. mount
65. You just added a new user, kara, to the system. What group is kara added to by default?
Correct : B. kara
66. Which of the following command lists the last 10 lines of a file?
Correct : B. tail
67. What command is used to terminate a process?
Correct : A. kill
68. What command is used with vi editor to delete three words?
Correct : B. 3 dw
69. What command is used to assign only read permission to all three categories of the file'letter'?
Correct : B. chmod ugo = r letter
70. What command is used with file named 'letter' to remove the executable permission from the user and assign read permission to the group and others?
Correct : D. chmod u - x, go + r letter
71. What command is used to assign executable permission to the owner of the file named "letter"?
Correct : B. chmod u + x letter
72. What command is used to summarize the disk usage?
Correct : B. du
73. What command is used to list the jobs currently in print queues?
Correct : A. lpq
74. What is the following syntax used for command 2> /dev/null
Correct : D. Send error messages from command to a file called /dev/null
75. How do you delete your crontab entry?
Correct : C. crontab -r
76. How do you create a crontab entry?
Correct : C. crontab -e
77. How would you display running httpd processes?
Correct : A. ps -C httpd
78. How would you avoid accidentally removing files?
Correct : A. rm -i
79. How would you search for the string clothes at the end of the line in a file called shopping?
Correct : C. grep 'clothes$' shopping
80. Which runlevel allows full multiuser mode but with no graphical login manager?
Correct : C. Runlevel 3
81. How would you sort a file called shopping on column 3?
Correct : B. sort -k 3 shopping
82. How do you run a job that will continue running even if you are logged out?
Correct : D. nohup command
83. What is the following syntax used for? command >file1 2>file2
Correct : A. Send command's standard output to file1,and its standard error to file2
84. What does the 2>&1 at the end of the following command mean?find / -name fred.txt > names 2>&1
Correct : C. Send standard error to the same place as standard output
85. Which command is used to unmount a filesystem?
Correct : D. umount
86. Which file determines what will be run at each runlevel?
Correct : D. /etc/inittab
87. What is the full path for grub's configuration file
Correct : B. /boot/grub/menu.lst
88. How do you display the kernel release?
Correct : B. uname -r
89. What does the permission string rwxr-xr-- correspond with in octal?
Correct : B. 754
90. How do you display your current crontab entry?
Correct : D. crontab -l
91. How do you see hidden files in your home directory?
Correct : B. ls -la
92. How do you direct the shell to execute a command in the background?
Correct : A. Put an & symbol at the end of the command line.
93. What keyboard combination can be used to exit the shell?
Correct : C. Ctrl+D
94. What is the purpose of the following operator? >>
Correct : D. It appends data to a file without overwriting it.
95. How would you remove a directory that is not empty?
Correct : A. rm -r
96. To display information about the processor itself - display the contents of which file?
Correct : D. /proc/cpuinfo
97. To run date first, and then ls -l, which of the following is correct?
Correct : B. date ; ls -l
98. Which file is the list of commands you recently entered stored in?
Correct : C. .bash_history
99. Which of the following runs the last command you entered?
Correct : C. !!
100. What is the shortest command to take you to your home directory?