Date: Sun, 3 Jun 2007 10:42:15 +0200 From: VeeJay <maanjee@gmail.com> To: "Kevin Hunter" <hunteke@earlham.edu> Cc: sac <sac@inf.in>, FreeBSD-Questions <freebsd-questions@freebsd.org> Subject: Re: How to disable command prompt history? Message-ID: <2cd0a0da0706030142l1fd30d74yc443e132337daf37@mail.gmail.com> In-Reply-To: <4661B6E0.803@earlham.edu> References: <2cd0a0da0706020638g48b7ac7fn946c6e3caddc0663@mail.gmail.com> <466199E5.3040005@vindaloo.com> <e14997e00706021056h2c94e1c6je3e57acc33841066@mail.gmail.com> <4661B6E0.803@earlham.edu>
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Thank you guys, Actually, it was for the security reason that if somebody breaks in the server then he/she doesn't see what commands are being executed, etc, etc.... and I am using /bin/sh any more comments? thanks, VJ On 6/2/07, Kevin Hunter <hunteke@earlham.edu> wrote: > > At 1:56p -0400 on 02 Jun 2007, sac wrote: > > On 6/2/07, Christopher Hilton <chris@vindaloo.com> wrote: > >> VeeJay wrote: > >>> Could someone would like to describe that how we can disable to show > >>> last executed commands by pressing Up Arrow? > >>> > >> > >> That would depend on which shell you are running. Can you run the > >> following command and post the results here? > >> > >> echo $SHELL > > > > By default most of the shells like bash, zsh, ksh have history option. > > But you can avoid writing the history of the current session to the > > history file by unsetting the HISTFILE environment variable. > > So next time when you login the history of the previous session will > > not be shown. > > I'd be curious as to the underlying "why?". Having a history of what > you've done is generally a Good Thing. The only reason that I > personally have ever come across to necessitate not storing my actions > is when I'm playing a prank on one of my friends. Other than that, > having the ability to go see what commands I was executing three years > ago comes in awful handy. I /could/ recreate that arcane command > sequence for that one-off job I needed 1,237 days ago, or I could do a > > history | grep 'substring I remember in command' | less > > And, if you're worried about the space it takes to store the history, > don't. It's extremely negligible. > > Kevin > -- Thanks! BR / vj
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