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Full Discussion: Shell script to ping multiple servers
Top Forums Shell Programming and Scripting Shell script to ping multiple servers Post 302993948 by MadeInGermany on Thursday 16th of March 2017 02:56:25 PM
Old 03-16-2017
I guess you have an empty line in your list.
The following discards empty lines and #comments and trailing space characters:
Code:
#!/bin/bash

date
while read output junk <&3
do
  case $output in
  "#"*|"")
  ;;
  *)
    ping -c 1 "$output" > /dev/null
    if [ $? -eq 0 ]; then
      echo "node $output is up"
    else
      echo "node $output is down" | mailx -s "$output not pinging" xyz@klm.com
    fi
  ;;
  esac
done 3< /var/tmp/servers.list

 

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LEARN ABOUT CENTOS

dshbak

DSHBAK(1)						      General Commands Manual							 DSHBAK(1)

NAME

       dshbak - format output from pdsh command

SYNOPSIS

       dshbak [OPTION]..

DESCRIPTION

       The  dshbak  program  formats  pdsh  pdsh output for humans.  Output from each node is consolidated, the leading "node:" is stripped, and a
       header block with the node name is added. If the -c option is specified, nodes with identical output are not displayed twice; instead,  the
       header will contain a list of nodes. The list of nodes is further compressed into node ranges if the node names have a numeric suffix.

OPTIONS

       -h     Display a summary of command line options.

       -c     Do not display identical output from nodes twice. Instead, print the list of nodes with matching output in the header block.

       -d DIR Write consolidated node output to separate files in output directory DIR. Any existing files will be overwritten.

       -f     With -d, force creation of specified DIR.

ORIGIN

       A rewrite of IBM dshbak(1) by Jim Garlick
       <garlick@llnl.gov> on LLNL's ASCI Blue-Pacific IBM SP system.

SEE ALSO

       pdsh(1)

       http://pdsh.googlecode.com

								    2011-02-26								 DSHBAK(1)
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