Command Substitution: Output Into a Command

Command substitution — $(command) — runs a command and drops its output right into the line you're building. It's how a filename gets today's date, or a variable gets a computed value.

Two tasks, both under /root/out/:

1. Create a dated snapshot file named exactly snapshot-YYYY-MM-DD.txt where the date is TODAY's, produced with $(date +%F) — not typed by hand. It's a regular file in /root/out/ and must not be empty — put any text inside it (an empty touch doesn't count).

2. Create /root/out/host-report.txt whose FIRST line is the machine's kernel release, captured with $(uname -r).

Grading recomputes $(date +%F) and $(uname -r) live and checks your files match — so the values must genuinely come from the commands, not a copy-paste that goes stale tomorrow.