Bash script + expect


 
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Old 08-06-2018
Bash script + expect

im very happy to back for this forum


I have servers with alias of double dns extentions:
sample:
servera.test.com
servera.test1.com


serverb.test.com
serverb.test1.com


I need to login to that severs and executing the set of commands


if test.com failed then try to login via test1.com


i'l create a bash script with expect and spawn but the issue is I cant able to do the if , else for giving the hostname with dns alias.


if anyone known, please help me on this ,after long and many years im starting my script knowledge.


thanks in advance.
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desproxy-dns(1) 						   User Commands						   desproxy-dns(1)

NAME
desproxy-dns - DNS for dynamic connections SYNOPSIS
desproxy-dns dns_server proxy_host proxy_port OPTIONS
None DESCRIPTION
If you have direct DNS access then you don't need to do anything else. You know you have direct DNS access if you can resolve host names to IP addresses. NOTE: as desproxy-dns listens in port 53 (which is less than 1024) you may need administrator privileges to exec desproxy-dns (in fact if you are running UN*X, you actually have to run desproxy-dns as root). OK, so you have a dns server accessible now. But your computer doesn't know anything about that. You must configure your network accordingly (again, need to be root in UN*X). Edit /etc/resolv.conf and add the line "nameserver 127.0.0.1". You don't have to restart anything. Just test ping and see if it works. ENVIRONMENT
None. FILES
None. SEE ALSO
dnsproxy(1), ping(1) AUTHORS
This manual page was written by Jari Aalto <jari.aalto@cante.net>, for the Debian GNU system (but may be used by others). Released under license GPL v2 or any later version. desproxy-dns 2012-03-26 desproxy-dns(1)