Unix problems
- 1. Which of the following commands is used to assign executable permission to the owner of the file named "note"?
Options- A. chmod g+x note
- B. chmod u+w note
- C. chmod u+x note
- D. chmod ugo+x note
- E. None of the above Discuss
Correct Answer: chmod u+x note
Explanation:
Users selection:
u - user: the owner of the file.
g - group: users who are members of the file's group.
o - others: users who are not the owner of the file or members of the group.
a - all: all three of the above, is the same as ugo.
Permissions:
r - read
w - write
x - execute
So, u+x => Execute (x) permission to Owner (u).
u - user: the owner of the file.
g - group: users who are members of the file's group.
o - others: users who are not the owner of the file or members of the group.
a - all: all three of the above, is the same as ugo.
Permissions:
r - read
w - write
x - execute
So, u+x => Execute (x) permission to Owner (u).
- 2. Which command is used to copy a file wb with the same name from the programs directory to the misc directory?
Options- A. copy programs/wb misc/wb
- B. cp programs/wb misc
- C. tar programs/wb misc/wb
- D. copy a:programs/wb b:misc/wb
- E. None of the above Discuss
Correct Answer: cp programs/wb misc
- 3. Which command is used to locate all the .profile files in the system?
Options- A. ls profile
- B. find /-name profile -print
- C. cd /.profile
- D. l -u .profile
- E. None of the above Discuss
Correct Answer: find /-name profile -print
- 4. Which command is used to set the three permissions for all the three categories of users of a file?
Options- A. chgrp
- B. chown
- C. chmod
- D. chusr
- E. None of the above Discuss
Correct Answer: chmod
- 5. Which command is used to delete all files in the current directory as well as all files and sub-directories in its subdirectories?
Options- A. rm *
- B. rm -r *
- C. rm all
- D. rm *.*
- E. None of the above Discuss
Correct Answer: rm -r *
- 6. Which of the following commands is used to count the total number of lines, words, and characters contained in a file.
Options- A. count p
- B. wc
- C. wcount
- D. countw
- E. None of the above Discuss
Correct Answer: wc
- 7. Which command is used to create a directory?
Options- A. crdir
- B. md
- C. mkdir
- D. cr
- E. None of the above Discuss
Correct Answer: mkdir
- 8. Which command is used with vi editor to move cursor forward to first occurrence of character 'ch' in the current line?
Options- A. tch
- B. fch
- C. rch
- D. ech
- E. None of the above Discuss
Correct Answer: fch
- 9. Which of the following commands is used to copy directory structures in and out
Options- A. cp
- B. cpio
- C. cp - p
- D. copy
- E. None of the above Discuss
Correct Answer: cpio
- 10. Which operator will be used with chmod command to assign absolute permission?
Options- A. +
- B. -
- C. =
- D. %
- E. None of the above Discuss
Correct Answer: =
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