Questions for Assignment Test-2 USP on 04-11-2018 (Sunday @12:15 to 1:15)

Assignment Test-2 USP on 04-11-2018 (Monday Time Table on Sunday @ 12:15 to 1:15.......

1. Explain the different modes of vi editor with neat block diagram.

2. Explain what wild-card patterns match:
1) [A-Z]????*   2) *[0-9]*    3) *[!0-9]   4) *.[!S][!h]

3. Write the output of following Unix commands.
1) ls *.c   2) mv * ../ise   3) cp foo foo*   4) cp  ??????  progs   5) lp note[0-1] [0-9]
5) rm *.[!l][!0][!g]  6) cp  /home/cse/{A,B,C}  .

4. Discuss the three standard files supported by Unix.  (Standard I/O or Redirections)

5. Discuss Escaping and Quoting with examples.

6. What is grep command? Discuss with syntax, options, and examples.

7. Explain the test and [ ] with examples.

8. Write shell scripts for the following.

-A shell script to read pattern to be search and filename from the users from the terminal to apply grep command.

- A shell script to read pattern and filename to apply grep command using command line arguments.

- A shell script to display the following with appropriate messages.
Display system date.
Display user name of current user.
Display a list of users who are currently logged into the computer.
Display details of process in use.
Print current working directory.
Display shell in use.