systemd · easy · solved in-browser (no VM needed) · 3 tiered hints
Write /etc/tmpfiles.d/myapp.conf with two entries so systemd-tmpfiles recreates state at boot. Line 1: type 'd' for directory /run/myapp, mode 0755, owned by user myapp and group myapp, with age '-' (no cleanup). Line 2: type 'f' for file /var/log/myapp/app.log, mode 0640, owned by user myapp and group adm. Columns are space-separated: type, path, mode, owner, group, age. (Authored config, graded structurally — the engine isn't run here.)
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