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Top Forums Shell Programming and Scripting Ssh to validate multiple remote hosts connection validation. Post 303013228 by RudiC on Sunday 18th of February 2018 06:00:36 AM
Old 02-18-2018
For half of your configuration entries you don't need the ssh test as they don't comply to the "dotted quad" notation. And, as already implied by Don Cragun's proposal, the || [[ -n $lines ]] is not necessary because it would be executed only if the read failed anyhow (e.g. at enf of file), terminating the while loop.
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dnetcat(1)							   User Commands							dnetcat(1)

NAME
dnetcat - opens a DECnet connection SYNOPSIS
dnetcat {-h|--help} dnetcat [-v] [-z] node[::|[::] ]object dnetcat [-v] [-f] -l object DESCRIPTION
dnetcat is a netcat(1) like tool that opens a DECnet connection and copies all data between the standard input/output to/from the socket. OPTIONS
-v Be verbose. Prints useful (debug) messages. -z Zero IO mode. In this mode a connection is dropped directly after it is opened. This can be used to scan if the remote side listens on the given address and object. -l Listen mode. In this mode dnetcat accepts connections on the given object. -f Fork on new connection. This let netcat accept multiple connections in listen mode. This is ignored if -l is not given. --help, -h Prints a small help. EXAMPLES
This program can be used as 'ProxyCommand' for ssh(1). You may use it via command line like this: ssh -o 'ProxyCommand dnetcat %h ssh' [...] mynode or you may use it in your ~/.ssh/config like this: Host *:: ProxyCommand dnetcat %h ssh This will enable you to connect to any DECnet node by adding "::" at the end of the node name like this: ssh mynode:: For more information on ssh(1) see it's manpage. SEE ALSO
ssh(1), netcat(1). AUTHORS
This program is written by Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>. dntools September 2008 dnetcat(1)
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