обзор иерархии файловой системы (File system hierarchy overview)
COMPATIBILITY SYMLINKS
/bin/, /sbin/, /usr/sbin/
These compatibility symlinks point to /usr/bin/, ensuring
that scripts and binaries referencing these legacy paths
correctly find their binaries.
/lib/
This compatibility symlink points to /usr/lib/, ensuring that
programs referencing this legacy path correctly find their
resources.
/lib64/
On some architecture ABIs, this compatibility symlink points
to $libdir, ensuring that binaries referencing this legacy
path correctly find their dynamic loader. This symlink only
exists on architectures whose ABI places the dynamic loader
in this path.
/var/run/
This compatibility symlink points to /run/, ensuring that
programs referencing this legacy path correctly find their
runtime data.
