53 lines
1.8 KiB
Markdown
53 lines
1.8 KiB
Markdown
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# Bash scripting exercises
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## Write a script that outputs interesting network information
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The script takes no arguments and just outputs interesting information about the network in an easy to read format.
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Output at the minimul the following information but more is better.
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* internal ip address
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* external ip address
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* default route
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* the nameservers used by the machine
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* your hostname
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### Additional challenges
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* see if you can ping 8.8.8.8 and display only the time it takes
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* can you ping the same host multiple times and calculate the average?
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* display an error message if the destination can not be reached
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* evaluate the quality of the uplink with `speedtest-cli` and echo back some relevant information (but not all)
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## Write an alarm clock
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**TODO** (IPC exercise)
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## Automate adding users to your machine
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Write a script that can add a list of users to your system.
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Make it so that the newly created users have a default password that is the same as their username.
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You can go about this in two ways, either the command line arguments are the usernames, **or** the first command line argument supplies a text file where every line is a user.
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```bash
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./my_script.sh bob alice marie camille roger
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./my_script.sh /path/to/user/list.txt
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```
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In the second example the `/path/to/user/list.txt` file would contain the following lines.
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```
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bob
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alice
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marie
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camille
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roger
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```
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### Additional challenges
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* display an error message when the script is executed as a **non root** user
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* add all of the new users to a specific group
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* put all of the new users $HOME directory in a distinct folder so that their home would be `/home/students/$HOME`
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* write a **second** script that removes these users from the system **and** also removes all traces of their existance
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* how could you combine both scripts into one big script?
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