Tcl / expect need to attempt telnet if failed ssh Post: 303028257

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Top Forums Shell Programming and Scripting Tcl / expect need to attempt telnet if failed ssh Post 303028257 by Don Cragun on Wednesday 2nd of January 2019 09:28:33 PM

01-02-2019

Registered User

I haven't tried what you're trying to do before, but the syntax you're using mostly looks OK.

You haven't said what operating system you're using and that can make a difference for some versions of ssh. On most systems, the destination device has to follow the options, so there is a chance that it might work if you change:

Code:

#             -re "Connection refused|Connection timed out" { spawn ssh -o StrictHostKeyChecking=no $dev -l $unam }
             timeout { spawn ssh -o StrictHostKeyChecking=no $dev -l $unam
                     expect {
                            timeout { set err [ open "$hnam\_$dev.err" w ] ;
                                      puts $err "SSH timed out for $dev.\n";
                                      log_file ;
                                      exit; }

                             }

                     }
             }

to:

Code:

             -re "Connection refused|Connection timed out" {
                     spawn ssh -o StrictHostKeyChecking=no -l $unam $dev
                     expect {
                            timeout { 
                                      set err [ open "$hnam\_$dev.err" w ] ;
                                      puts $err "SSH timed out for $dev.\n";
                                      log_file ;
                                      exit;
                            }
                    }
             }
             timeout { spawn ssh -o StrictHostKeyChecking=no -l $unam $dev
                     expect {
                            timeout { set err [ open "$hnam\_$dev.err" w ] ;
                                      puts $err "SSH timed out for $dev.\n";
                                      log_file ;
                                      exit; }
                             }
                     }
             }

Obviously, this is totally untested. I would suggest that you turn on tcl's debugging output by including the -d option when you start it.

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LEARN ABOUT LINUX

ssh-copy-id

SSH-COPY-ID(1)						      General Commands Manual						    SSH-COPY-ID(1)

NAME

       ssh-copy-id - install your public key in a remote machine's authorized_keys

SYNOPSIS

       ssh-copy-id [-i [identity_file]] [user@]machine

DESCRIPTION

       ssh-copy-id  is	a script that uses ssh to log into a remote machine and append the indicated identity file to that machine's ~/.ssh/autho-
       rized_keys file.

       If the -i option is given then the identity file (defaults to ~/.ssh/id_rsa.pub) is used, regardless of whether there are any keys in  your
       ssh-agent.  Otherwise, if this:

	     ssh-add -L

       provides any output, it uses that in preference to the identity file.

       If  the -i option is used, or the ssh-add produced no output, then it uses the contents of the identity file.  Once it has one or more fin-
       gerprints (by whatever means) it uses ssh to append them to ~/.ssh/authorized_keys on the remote machine (creating the file, and directory,
       if necessary.)

NOTES

       This program does not modify the permissions of any pre-existing files or directories. Therefore, if the remote sshd has StrictModes set in
       its configuration, then the user's home, ~/.ssh folder, and ~/.ssh/authorized_keys file may need to have group writability  disabled  manu-
       ally, e.g. via

	     chmod go-w ~ ~/.ssh ~/.ssh/authorized_keys

       on the remote machine.

SEE ALSO

       ssh(1), ssh-agent(1), sshd(8)

OpenSSH 							 14 November 1999						    SSH-COPY-ID(1)

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