Assignment-3 : Unix and Shell Programming

1. Discuss ordinary and environment variables with examples.

2. Discuss .profile with example.

3. Discuss the here document (<<) and trap command with examples.

4. Explain set and shift commands used in Unix to manipulate positional parameters.

5. Discuss the following Unix commands (filters) with syntax and examples.
    cut, paste, head, tail

6. Write differences between hard link and soft link.

7. Discuss the sort command with syntax, options and examples.

8. Discuss umask and default file permissions with examples.

9. Discuss two special files /dev/null and /dev/tty with examples.

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10. What is process? Discuss.

11. Explain the mechanism of process creation.

12. Explain the following commands.
      at, cron, nice and nohup

13. Discuss kill command with examples.

14. Explain find command with it's syntax, options and examples.

15. Discuss bg and fg command with examples.