[Aptitude-devel] Bug#902146: Bug#902146: mention example of "update the package lists"

[Axel Beckert]

Hi Jidanni,

積丹尼 Dan Jacobson wrote:
> W: Could not lock the cache file; this usually means that dpkg or another apt tool is already installing packages.  Opening in read-only mode; any changes you make to the states of packages will NOT be preserved!
> 
> Then please say
> < W: You may want to update the package lists to correct these missing files
> > W: You may want to update the package lists to correct these missing
> > files, by using for example, apt-get update.

I don't think that's necessary as "update the package lists" is
already very precise. Nor do I think it's a good idea to extend that
message to two lines or over 80 characters.

And even if, it should say "aptitude update" if it's an error message
by aptitude.

> If that is indeed what you mean.

At least in this case, it won't help as "apt-get update" might error
out with a very similar error message, as that's likely the real cause:

> W: Could not lock the cache file; this usually means that dpkg or
> another apt tool is already installing packages. Opening in
> read-only mode; any changes you make to the states of packages will
> NOT be preserved!

(Which IMHO way too long for a one-line error message.)

		Regards, Axel
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