BSc.-Linux-Mumbai-April 2019

MUMBAI UNIVERSITY

Subject: Linux

Semester: 2

[Time: 2½ Hours]
[Total Marks: 75]
N.B. 1) All questions are compulsory.
2) Figures to the right indicate marks.
3) Illustrations, in-depth answers and diagrams will be appreciated.
4) Mixing of sub-questions is not allowed.
5) Assume suitable data if required or not given.
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Q. 1 Attempt All(Each of 5Marks) (15M)

a) Multiple Choice Questions

1) ___________ represents user’s home directory.
(a) / (b) \
(c) ~ (d) |

2) __________ is not Linux distribution.
(a) Centos (b) Fedora
(c) Ubuntu (d) MS Windows

3) How do you rename file “new” to file “old”?
a) mv new old (b) move new old
c) cp new old (d) m new old

4) Full form of SSH is_________ .
(a) Secure Shell (b) System Shell
(c) Source Shell (d) Superuser Shell

5) Consider a command “echo “My name is khan” | gawk ’{$4=” university”; print $4}” will print.
(a) My name is khan (b) Khan
(c) university (d) My name is university

B) Fill in the blanks. (copy, cp, \dev ,\bin, head , who, chmod) (5)

1) __________ command is used to copy files and directories?

2) _________ directory contain device special files.

3) To display information of users ____ command is used.

4) _____ command is used to print first few lines of a file.

5) ________ is used to change file permissions.

C) Short Answers (5)

1) State the rules for writing file name in Linux.

2) What is the need of cat command in Linux?

3) Define the term full duplex with respect to communication.

4) What do you mean by shell?

5) Give the name (path) of file containing user‟s password-related information.

Q. 2 Attempt the following (Any THREE)(Each of 5Marks) (15M)

(a) Explain the relationship between kernel and shell with a neat diagram.

(b) What are the different points which make GUI more user friendly compared to
command-line interface?

(d) Discuss „init‟ process along with its run levels.

(e) Explain the following options for shutdown process.
i) -a
ii) -r
iii) -h
iv) Time
v) Message

(f) Write use of following directories in Linux:
i) /etc
ii) /root
iii) /bin
iv) /sbin
v) /lib

Q. 3 Attempt the following (Any THREE) (Each of 5Marks) (15M)

(a) Write a note on the following:
i) Launcher
ii) Dash
iii) Workspaces

(b) State the purpose of following commands:
i) nslookup
ii) dig
iii) arp
iv) factor
v) info

(c) What do you mean by environmental variable? Explain following
environmental variables in one line.
i) PATH
ii) SHELL
iii) HOME
iv) PS2

(d) Explain the use of following commands:
i) cal
ii) date
iii) wc
iv) echo
v) whoami

(e) Explain in brief hard link and soft link with suitable example.

(f) Discuss following Linux Documentation commands: –
i) man
ii) info

Q. 4 Attempt the following (Any THREE) (Each of 5Marks) (15M)

(a) Write a short note on FTP.

(b) Discuss test command for file comparison.

(d) Write a shell script to accept 2 numbers from user and one operator. Based on the operator entered perform addition, subtraction, multiplication and division.

(e) Write any five privileges of an administrator.

(f) Assume that there is a file called “number” with following data

1	2
4	5
6	6
8	9

Write the purpose of awk command and command perform following:
1) Add two columns.
2) Find the average.
3) Multiply two columns.

Q. 5 Attempt the following (Any THREE) (Each of 5Marks) (15M)

(a) State the use of ps command with any 4 options.

(b) Explain the following file compression utilities:
i) bzip2
ii) gzip

(d) List option of 1s- 1 command and describe each column in short.

(e) Discuss IP address.