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Re: [PBML] Enter info after seeing certain prompt

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  • Jonathan Chen
    ... though? ... server... ... ssh- ... do ... You know, I actually have trouble getting RH7 through 9 to work with passwordless login. Well not actually
    Message 1 of 9 , Oct 1, 2004
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      --- In perl-beginner@yahoogroups.com, daymobrew@y... wrote:
      > --- In perl-beginner@yahoogroups.com, "Jonathan Chen" <mrchen5@y...>
      > wrote:
      > > Thanks for expect solution. But how would it be done in perl
      though?
      > >
      > > Here is what my program will do...
      > >
      > > 1) ssh to the server and log in
      > > 2) Execute the command and it would go back to the starting
      server...
      > >
      > > Basically its performing the command below without ssh-agent or
      ssh-
      > > add...
      > >
      > > "/usr/bin/ssh root@phoenix /usr/local/logs/dcheck.sh"
      > >
      > >
      >
      > [Apologies for mid-posting - I'm addressing the line above]
      >
      > Is this suitable for a cron-job?
      > The public keys suggestion would make this really easy - you could
      do
      > it all in the shell script then.
      >

      You know, I actually have trouble getting RH7 through 9 to work with
      passwordless login. Well not actually passwordless but still I tried
      to find solutions via web and they are seems confusing to me.

      Got a good website to help me with password solution? I am thinking
      of a temporarily solution till someone figures out how do the "Expect"
      like scripting with PERL. Perl is what I want to master. =)
    • Ken Wolcott
      ... cat /etc/redhat-release Red Hat Linux release 9 (Shrike) /msa3530 which expect expect is /usr/bin/expect Guess you didn t install all of Red Hat. Ken
      Message 2 of 9 , Oct 1, 2004
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        On Thu, 2004-09-30 at 21:43, Jonathan Chen wrote:
        > Yes. There is a module for it. I was hoping that with someone's help
        > of writing a module similar to the one on cpan would help me do
        > similar things when writing other programs. I am kinda aware of what
        > "Expect" is and want perl to emulate it. I tried to look for "Expect"
        > in RH 7 and RH9 and there is no such program.


        cat /etc/redhat-release
        Red Hat Linux release 9 (Shrike)
        /msa3530> which expect
        expect is /usr/bin/expect

        Guess you didn't install all of Red Hat.

        Ken
      • Jeff Eggen
        ... Are you using openssh? 1. Generate private / public keypair on source host with ssh-keygen command. 2. Copy public key to target server, put in a file
        Message 3 of 9 , Oct 1, 2004
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          >Got a good website to help me with password solution? I am thinking
          >of a temporarily solution till someone figures out how do the "Expect"
          > like scripting with PERL. Perl is what I want to master. =)

          Are you using openssh?

          1. Generate private / public keypair on source host with ssh-keygen command.
          2. Copy public key to target server, put in a file called authorized_keys in the $HOME/.ssh/ directory.
          3. On source server, run "ssh targetserver date" to test it, where targetserver is the target server.

          This should get you set up to not require a password: if it doesn't work, then your ssh server config needs tweaking. This would be odd, as most of the time the default config will allow for this behavior. Note that for this setup, you still need whatever passphrase is on the private key. If you create the key without a passphrase, then you can get in without any interaction at all.

          As for the Perl / Expect thing, you could always download the Expect module from the CPAN and look at how it does whatever it does. However, if you want to master Perl, then one of the first steps is realizing that if someone has made a module to do something difficult, use theirs. Reinventing the wheel is typically more trouble than it's worth. For learning purposes, I got more value out of the O'Reilly books (especially Randal's books, and the Cookbooks) and writing small programs using them as references than anything else.

          Hope this helps somewhat,

          Jeff Eggen
          IT Programmer Analyst
          Saskatchewan Government Insurance
          Ph (306) 751-1795
          email jeggen@...

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