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'alias' is a non-portable bash-ism. Of course, this matters less now Oracle as declared Solaris dead. cheers stuart -- I have a new phone number: 04 463 5692 ________________________________________ From: Code for Libraries <[log in to unmask]> on behalf of Alex Berry <[log in to unmask]> Sent: Wednesday, 29 October 2014 1:11 p.m. To: [log in to unmask] Subject: Re: [CODE4LIB] Subject: Re: Why learn Unix? And that is why alias rm='rm -I' was invented. Quoting Roy Tennant <[log in to unmask]>: > I agree. I've done serious damage to my own server this way. Anyone > who knows me knows that I'm completely capable of this. Unlike > others, who are both more intelligent and more cautious. Down the > path of the wild carded, recursive delete command lies DANGER. Having > a little bit of knowledge is more dangerous, in most cases, than none > at all. In Unix and in whitewater rafting. > Roy > > >> On Oct 28, 2014, at 6:46 PM, Cary Gordon <[log in to unmask]> wrote: >> >> Well you can do a lot of damage quickly using very short commands. Deleting >> the master boot record can be quite effective, but I will demure from >> giving specific examples. >> >> >> >> On Tue, Oct 28, 2014 at 3:22 PM, Stuart Yeates <[log in to unmask]> >> wrote: >> >>>> -- Because you can delete everything on the system with a very short >>>> command. >>> >>> This is actually a misconception. >>> >>> The very short command doesn't delete everything on the system. The >>> integrity of files which are currently open (including things like the >>> kernel image, executable files for currently-running programs, etc) is >>> protected until they are closed (or the next reboot, whichever is first). >>> These files vanish from the directory structure on the filesystem but can >>> still be accessed by interacting with the running processes which have them >>> open (or /proc/ for the very desperate). >>> >>> This is the POSIX alternative to the windows "That file is currently in >>> use" scenario and explains why, when a runaway log file fills up a disk, >>> you have to both delete the log file and restart the service to get the >>> disk back. >>> >>> cheers >>> stuart >> >> >> >> -- >> Cary Gordon >> The Cherry Hill Company >> http://chillco.com >