是否可以创建虚拟符号链接？

Question

I have a web server that has the following directory structure

/var/www/html/www.example.com/wp-content/themes/exampletheme/custom

where "custom" is actually a symlink to /var/www/custom

This works as expected.

However the theme updater deletes and recreates the entire exampletheme directory, which also deletes the "custom" symlink it contains, which breaks the site.

Is there a way to create a persistent filesystem location (maybe in fstab?) that would make "custom" always appear in the /var/www/html/www.example.com/wp-content/themes/exampletheme/ directory?

I found something sort of similar using udev, but it only works for devices.

I had considering using cron to keep checking and create it if it's missing, but that's kind of kludgy.

Answer 1

You can bind-mount /var/www/custom onto /var/www/html/www.example.com/wp-content/themes/exampletheme/custom .

Mount points cannot be deleted, only unmounted, and that (a) requires root privileges and (b) not something programs usually resort to when they can't delete something. So that should work.