Scenario: "Minneapolis with a Vengeance": Break a CSV file

Level: Medium

Type: Do

Access: Email

Description: Break the Comma Separated Valued (CSV) file data.csv in the /home/admin/ directory into exactly 10 smaller files of about the same size named data-00.csv, data-01.csv, ... , data-09.csv files in the same directory. All the files should have the same header (first line with column names) as data.csv. None of the smaller files should be bigger than 32KB.

Note: unlike the original Minneapolis scenario, here the resulting files have to be proper CSV files.

As a helper tool, you can run the program check_csv.py to check if your data-??.cs files look like proper CSV files.

Test: The "Check My Solution" button runs the script /home/admin/agent/check.sh, which you can see and execute.

Time to Solve: 20 minutes.

Scenario: "Hanoi": Find the Multitasking Users

Level: Medium

Type: Do

Access: Paid

Description: The Hanoi office has a Linux server with a large number of user accounts and groups. The system administrators need to identify which users belong to multiple groups for better access management.

Given two files, `users.txt` and `groups.txt`, create a new file `/home/admin/multi-group-users.txt` containing the usernames of users who belong to more than one group, one username per line, sorted alphabetically.

The `users.txt` file contains a list of usernames, one per line. The `groups.txt` file contains group names and their members, in the format `group_name:user1,user2,user3`.

Test: Running md5sum /home/admin/multi-group-users.txt returns dc0ae86caae7125d21df03a0ab29d8ae

The "Check My Solution" button runs the script /home/admin/agent/check.sh, which you can see and execute.

Time to Solve: 15 minutes.

Scenario: "Batumi": Troubleshoot "A" cannot connect to "B"

Level: Medium

Type: Fix

Access: Paid

Description: (To learn the skills to solve this challenge, see Can't Connect to a Service: Linux Troubleshooting Guide)

There is a web server (Caddy) on HTTP port :80 but curl http://127.0.0.1 doesn't work. Find out what's wrong and make the necessary fixes so the web server returns a URL.

Note: as a limitation, the file /home/admin/db_connector.py must not be modified so that the challenge is considered solved properly.
The web server has to respond on the IP address 127.0.0.1; not only on "localhost".

Test: The command curl http://127.0.0.1 returns a URL address.

The "Check My Solution" button runs the script /home/admin/agent/check.sh, which you can see and execute.

Time to Solve: 20 minutes.