Question

Objective:

Practice common UNIX commands.

Procedure:

1. The following list of Unix commands are given for self-learning. Use 'whatis' or 'man' command to find out about each command. Your document should include the description or screen shots of the output from each of the command.

Commands:

1. df
2. du
3. gzip
4. file
5. history
6. wget

2. Changing access rights:

chmod u+x Dir1.0             adds execute permission for the owner

chmod go-w file1               removes write permission for the group and others

chmod ugo=rw testfile      sets the permissions for everyone to read and write, but not execute

chmod u=rwx newDir       sets the permissions for the owner to read, write, and execute

1. How to check access rights for files or directories?

• 2. Use the command in (a) to find out the access rights for the file named /etc/passwd.
• Who is the owner of this file?
• What is the permission for the group on this file?

Answer 1

Answer 1
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 df - report file system disk space usage

Answer 2
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du - estimate file space usage

Answer 3
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Gzip reduces the size of the named files using Lempel-Ziv coding

gzip [file-name]

Answer 4
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Answer 5
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display typed command history on the terminal

Answer 6
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wget is used to download the file from the URL

Answer A
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ls -l <filename> or <directory name> will show the rights given to the user.

Answer B
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Root is the owner of passwd file

Group has only read rights on the passwd file.

Thanks