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I want to install man in MSYS2 so I tried both pacman -Ss man and pacman -Fs man (as per this question), as well a couple of others like pacman -Fs /usr/bin/man but they don't seem to give me an answer:

• 
  pacman -Ss man returns a lot of unrelated results.


• 
  pacman -Fs man finds msys/bash-completion 2.8-2 and msys/xmlto 0.0.28-1 which doesn't seem correct.

Still, when I do this:

$ pacman -S man
resolving dependencies...
looking for conflicting packages...

Packages (5) gdbm-1.16-1 groff-1.22.3-1 libgdbm-1.16-1 libpipeline-1.5.0-1 man-db-2.8.3-2

Total Download Size: 2.90 MiB
Total Installed Size: 15.72 MiB

:: Proceed with installation? [Y/n]

It seems correct – I think that man is inside the man-db-2.8.3-2 package. How does this work? Are there "search" commands that would find man before invoking the "sync" command?

(Note: while I'm in MSYS2 on Windows, I think the question is purely about Pacman and therefore valid on this site. I hope...)

From the pacman manpage, for -S:

Packages that provide other packages are also handled. For example,
pacman -S foo will first look for a foo package. If foo is not found,
packages that provide the same functionality as foo will be searched
for. If any package is found, it will be installed. A selection prompt
is provided if multiple packages providing foo are found.

And from the package information for man-db:

Provides: man

If pacman -Fs didn't find the man in man-db, try syncing the files database first (pacman -Fy), or use pkgfile.