10 Nov
2017
10 Nov
'17
2:53 a.m.
On Wed, 8 Nov 2017, Will Senn wrote:
If you're interviewing a new hire, see how long it takes 'em to work out
what this does:
:; </etc/motd> /dev/tty sed 1q ;: echo "Hello, world"
Tested on all shells at my disposal; might even work on V7. Did I mention
that I use Perl, and used to use APL\360? The only reason I don't write
obfuscated code is that I might be the one who has to maintain it later...
--
Dave Horsfall DTM (VK2KFU) "Those who don't understand security will
suffer."
<
filename head -20
too bad head doesn't exist on v7. I did have to look up the incantation
in Intro to the Shell by Bourne, that's fascinating stuff and it still
works on my mac - nuts!