in reply to Re^4: A little demo for Net::SSH2
in thread A little demo for Net::SSH2

Explain "does not work". What do you expect, what happens instead? Any messages?

Add error checks to your code.


Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

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Re^6: A little demo for Net::SSH2
by Anonymous Monk on Nov 01, 2010 at 14:35 UTC

    zentara: No still does not work.

    afoken: Does not work means as follow: I run the perl script (Net::SSH2) in my machine host1, which is supposed to run a command "a.out" in machine host2. If I do

    I can see in host2 this program running. (by command ps or top) But if I do
    $chan1->exec("./a.out &"); or $chan1->exec("nohup ./a.out"); (as zentara suggested)
    I do not see any program running in host2.

    The machines are NFS mounted, so all machines can see same home directory.

      Hi, you need both nohup and &, AND some minimal daemonizing. :-)

      I just tested this, and I see what the problem is. To run the program in the background, you need to close up/redirect it's stdin,stdout,stderr filehandles, like in the daemonization process. Anyways, this syntax works.

      #!/usr/bin/perl use warnings; use strict; use Net::SSH2; my $ssh2 = Net::SSH2->new(); #using keys authorization my $pass = 'ztester'; $ssh2->connect('localhost') or die "Unable to connect Host $@ \n"; # works when run from z's homedir because you need # permission to read the keys $ssh2->auth_publickey('zentara', '/home/zentara/.ssh/', '/home/zentara/.ssh/id_dsa', $pass ); my $chan = $ssh2->channel(); $chan->blocking(1); #close up the filehandles... rename foo to whatever you want $chan->exec("nohup /home/zentara/perlplay/net/zzsleep > foo.out 2> foo +.err < /dev/null &"); $chan->send_eof; exit;
      The zzsleep program is simply
      #!/usr/bin/perl $|= 1; while(1){ print time, "\n"; sleep 1; }

      I'm not really a human, but I play one on earth.
      Old Perl Programmer Haiku ................... flash japh