Scenario: "Bournemouth": Same job, three shells

Level: Medium

Type: Do

Tags: bash  

Access: Email

Description: This box is a small shell lab. Debian's /bin/sh is dash, your login shell is bash, and zsh is installed. Cron, Docker CMD lines, and most #!/bin/sh scripts do not run bash — and zsh script.sh does not honour a POSIX shebang.

Read /home/admin/lab/00-START-HERE.txt and run the demos with:
/home/admin/lab/compare.sh /home/admin/lab/demos/01-identity.sh
(there are ten snippets under demos/; run-all.sh runs every one).

Then write a script /home/admin/fleet-report.sh that prints a host status table from /home/admin/lab/inventory/ (hosts, disk.tsv, access.log).

Rules:
- One header line exactly: HOST DISK ERR STATUS
- Then one line per host from hosts, in that file's order: NAME DISK ERR STATUS (single spaces, no tabs)
- DISK is the integer from disk.tsv
- ERR is how many access.log lines have that host and code 500
- STATUS is crit if DISK >= 90 or ERR >= 5; else warn if DISK >= 80 or ERR >= 1; else ok

The same file must print that table with no extra lines when run as: sh /home/admin/fleet-report.sh, bash /home/admin/fleet-report.sh, and zsh /home/admin/fleet-report.sh.

demos/10-broken-report.sh is a bash sketch that is not a valid solution.

Root (sudo) Access: True

Test: /home/admin/fleet-report.sh exists. sh, bash, and zsh each print the same report for the inventory files, matching the rules above.

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

Time to Solve: 20 minutes.