HEAD (and GET and POST) are optional extras in libwww-perl; they are just aliases to the lwp-response script and aren't even built by default. head, on the other hand, is a fairly basic utility that should always be around, and all kinds of shell scripts can be expected to break if it isn't.
In reply to Re^3: what is /usr/bin/head
by ysth
in thread what is /usr/bin/head
by richill
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