Learn about basic Linux Commands

Practice with basic commands in Introduction to Linux lecture first.

Part 1

Read about chmod - Read about LINUX permissions

Write a shell script and using grep command (or anything else) display the IP address and machine name (use uname)
Create the following directories and files (/ is the root directory):
Write a shell script (called myshell) to perform the following:
Remove all the new directories: junks, primary, secondary.
Backup HOSTS file by creating HOSTS_BACK
Display the IP address of your machine
Create a new file called YOUR_IP_ADDRESS containing the IP address of your machine à thus, by doing a less YOUR_IP_ADDRESS we should get your IP address
Change the permission on YOUR_IP_ADDRESS such that can only be viewed by the user and make sure it is readable only.
Note: you should be able to run the script multiple times with no errors! (make sure you try that)

Part 2

In the root directory create three directories. Call them primary, secondary and junks. What commands will you use?
In the junks directory create a file called my_stall Write your first name in this file and save it. What commands will you use?
Move my_stall into the secondary directory. What commands will you use?
Move my_stall into the primary and change the name to my_first_file.log . In this directory you should only have one file. What commands will you use?
Draw the directory configuration for the above questions
Find the file called yp.conf; can you find it? where is it?
How can you login as a different user from a terminal?
How do you know which user you have signed in as?
What is the difference between commands touch and cat?
To find out when file .emacs was generated what command will you use?
How do you use echo command to display the following message: *** This is a test ****.
What will be the purpose of running the following command: ls /etca/*release*
What does SU command do?
What does ping do? what command can you use to ping?
What does ifconfig command do?
What can you do with chmod command. Make an example.
Using vi, how can you search for a string such as "name" in a file? What command will you use?
What command allows you to find the file called .bash_profile
Let's say you are logged on as the system administrator. Assuming .bash_profile file contains user specific environment and startup programs and it is located in the home directory of each user, where will be location of the file?
Display the .bash_profile file.What is the first line of .bash_profile file?
Explain the sequence of commands you use to create the following steps:
- Assuming you are the system admin, what is your home directory (all filenames and directory names are lower case) ?
- Write the command to create a directory called myprofile
- Write the command to create a file called mytest.txt in the above directory.
- Write the command to copy mytest.txt into yourtest.txt
- Write the command to copy mytest.txt into ourtest.txt
- At this point, write the name of all the files in myprofile

Part 3 - Writing a Shell Script

In this part you are expected to write a Linux Shell Script to perform the following tasks:

Display your IP address
Display your MAC address
Display your HOST name
Save the above information in a file called mynetwork.txt. Note that the created file must only have three lines in it.
use spd-say utility to say your IP address (you can install the utility using sudo apt-get install speech-dispatcher)

Please note that each of the above information must be displayed on a separate line. You can use grep command to display the information; consequently the line may contain additional information.

Note that you must create the script using VI editor. Use these links to learn more about VI: Vi Editor / Vi Commands / The script must be executable on the machines in the lab.

Submission: Nothing needs to be submitted. You must show your script to the instructor for full credit. The intructor must be able to execute your script. No partial credit will be granted.