Computer Science- Unix
Computer Science- Unix
21. The agency that sits between the user and the UNIX system is called the
- logic
- profile
- shell
- erxc
22. Which of the following commands is used to update access and modification times of a file?
- grep
- wc
- touch
- cat
23. Which command is used to count just the number of characters in a file?
- wc - 1
- wc -c
- wc -w
- wc -r
24. Which of the following commands is used to list contents of directories?
- ls
- lp
- dir
- tar
27. In vi editor, forward search is performed using the command.
- :pat
- :pat
- /pat
- All of the above
28. Which of the following special shell variables is used to process number of the last background job?
- $!
- $#
- $0
- $*
29. Which option will be used with ps command to slow the entire command line of the process being run?
- -4
- -f
- -1
- -4
30. Which of the following command addresses all users who are currently hooked on?
- write
- wall
- mesg