Fix a broken symlink

проверка…

Задание

A deployment left a symbolic link at /app/shortcut that points at a
non-existing path. Fix the link so it points at /app/target.txt.

$ ls -l /app/shortcut
lrwxrwxrwx 1 root root 12 /app/shortcut -> /nonexistent
$ readlink /app/shortcut
/nonexistent

/app/shortcut must be a symbolic link whose target is exactly /app/target.txt
(an existing file).

Practices reading and recreating symlinks — a daily operation when fixing
deployments where paths have moved.

Подсказки

Inspect the link with readlink /app/shortcut or ls -l /app/shortcut.
Recreate it: ln -sf /app/target.txt /app/shortcut
(-s = symbolic, -f = force overwrite existing).
A working link resolves to a real file: test -e /app/shortcut && echo ok.

Атомарный цикл up → check → down. Полезно для CI; без предварительной подготовки состояния проверка завершится с ошибкой.