Be careful when asking or answering questions (was Re: crontab update)

[Guy Harris]

> 
> I have a question about the safest way to update the cron program's
> crontab file ..........
> ....  Is there a special procedure to correctly update the crontab file?

To which various people have replied with answers either about the
V7/BSD "cron" or the S5R2-and-later "cron".

The answers about the V7/BSD "cron" are, as I remember, correct for
systems running that flavor of "cron" - one "crontab" file for the
system, usuall in "/usr/lib/crontab".

The answers about the S5R2-and-later "cron" (i.e., "use the 'crontab'
command") are correct for systems running that flavor of "cron" (one
"crontab" file per user).

The answers about the V7/BSD "cron" are, of course, incorrect for
systems running the S5R2-or-later "cron", and vice versa.

Does the fact that he refers to "*the* cron program's crontab file" -
"the" being present, and "file" being singular - mean that he's running
a system with the V7/BSD "cron"?  If so, the answers about using the
"crontab" command are wrong....

Note to askers of questions: please note what flavor of UNIX, and which
version of that flavor, you're running; the answer to your question may
depend on the version of UNIX you're running.

Note to answerers of questions: not all flavors of UNIX are alike.  The
person asking a question may have a version unlike yours.