[lfs-support] 6.06 Creating Essential Files and Symlinks

Qrux qrux.qed at gmail.com
Mon Feb 13 16:53:25 PST 2012

On Feb 13, 2012, at 4:07 PM, Andrew Benton wrote:

> On Mon, 13 Feb 2012 13:23:48 -0600
> Bruce Dubbs <bruce.dubbs at gmail.com> wrote:
>> The command 'lastb' uses btmp.
> It's true lastb can use /var/log/btmp, but only to read its contents.
> If nothing in LFS is writing to the file, do we need to create it in
> LFS? Wouldn't it be more sensible to create it in BLFS, on the ssh page?

It's not just about readers.  It's also about writers.

	Log of all attempted bad logins to the system. Accessed via the lastb command.

"Empirical" testing shows that login writes to btmp.  I infer, from that description given at TLDP, that everything that logs a bad-login attempt (e.g., login) ought to be writing to this file.  It is NOT an SSH-specific thing.

I assumed that since LFS was creating it in the first place, that LFS was the right place to keep it.  Unfortunately, the default LFS perms break downstream assumptions about /var/log/btmp, and that's what's being fixed.


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