2009/9/29 Daniel Braniss <danny_at_cs.huji.ac.il>: >> > Xin LI <delphij_at_delphij.net> writes: >> > > I'm not sure if anyone would find this useful: >> > > > > > - If a shutdown is initiated from a tty -and- >> > > - It's not a restart -and- >> > > - The time parameter is set to "now" >> > > >> > > Then, the shutdown(8) program would give something like this: >> > > >> > > Shutting down <hostname> NOW, press ^C within 5 seconds to cancel... >> > > >> > > So the user would get a chance to terminate it before it's too late. >> > I know we are living in a virtual world, where even shutting down >> > a computer is just a 'wish', but lets keep some sanity, now means now. > >> The "now" is not an issue; I think his point is that you *really* don't >> want to accidentally type "shutdown -h now" or "shutdown now" instead of >> "shutdown -r now" in an ssh session to a remote system - especially at 6 >> pm on a Friday night when the machine is in a colo center that's only >> manned during business hours. > > I understand what is at stake, my problem is that in other *Unixes, sysV/Solaris > 'shutdown now' is actually sometime in the future :-), and it does not help > much if you are far away and the link is slow, so the 5 sec. grace is actually > taken up by the bandwidth - or you are connected via an iphone, how do you > hit ^C :-) > > what if the machine is compromised and you really want to power it off, > now the intruder has another 5 seconds ... > > thankfully +0 works, or are there plans to change that too? :-) > > careful! bikeshead ahead % cat ~/bin/bikeshed #!/bin/sh echo "It's all gone pear-shaped!" sleep 5 shutdown -p now -- --Received on Fri Oct 02 2009 - 12:38:22 UTC
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