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Full Discussion: Speed up the loop in shell script
Top Forums Shell Programming and Scripting Speed up the loop in shell script Post 302965607 by RavinderSingh13 on Monday 1st of February 2016 05:21:14 AM
Old 02-01-2016
Hello kumar85shiv,

Could you please try following and let me know if this helps, though I haven't tested it with 500 or 300 IPs, I only tested with 5 IPs and I am getting results within a second, please try and let me know on same, also not sure how your script worked without closing if condition properly as I saw fi is missing in the post shown.
Code:
while read line 
do
if [[ -n  $(ping -c1 $line 2>/dev/null) ]] 
then
    echo "$line is pinging"
else
    echo "$line is not pinging"
fi
done < "Input_file"

EDIT: Also adding one more way to make script shorter and you could try with this if this script is helpful to you and taking less time.
Code:
while read ip; do
    ping -c1 "$ip" &>/dev/null && echo $ip success || echo $ip fail
done < "Input_file"

Thanks,
R. Singh
Last edited by RavinderSingh13; 02-01-2016 at 07:18 AM.. Reason: Added one more solution now on same.
 

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LEARN ABOUT HPUX

dceping

dceping(8)																dceping(8)

NAME

       dceping - test the ability to contact DCE services from a local DCE client.

SYNOPSIS

       dceping [-n number] [-s time] [-v] [-C] [service_name ...]  required to specify the literal strings, NAMESPACE or STRING_BINDING (see nond-
       cesvc(4)).

OPTIONS

       -n number Specify the number of pinging cycles. Each service is tested once per cycle. The default is one pinging cycle.  Specifying  -n  0
		 makes pinging continuous.

       -s time	 Specify  time,  in  seconds,  to  wait between pinging cycles. You must specify more than one pinging cycle with the -n option in
		 order to use -s.

       -v	 Run in verbose mode.

       -C	 Ping only core DCE services. This option is ineffective if a service_name is specified on the command line.

DESCRIPTION

       dceping verifies that a local DCE client can communicate with DCE and other services.  It uses the RPC management interface to determine if
       the DCE service is listening.  The core DCE services that dceping checks include secd, cdsd, gdad, rpcd, cdsadv, dtsd, and sec_clientd.

       You  can  ping  other DCE and non-DCE services by naming them in the file, /opt/dcelocal/hpadmin/etc/nondcesvc. If you want to determine at
       run time what services you want dceping to ping, you may do so using the same file.  See the manpage, nondcesvc(4), for more information.

       You may specify the services to ping on the command line separated by blanks. In this case, dceping does not ping any DCE core services	or
       the  services  listed  in  /opt/dcelocal/hpadmin/etc/nondcesvc. The service_name specified could be either a name in the DCE Cell Directory
       Service Namespace or an RPC string binding. It is not

AUTHOR

       dceping was developed by HP.

FILES

       /opt/dcelocal/hpadmin/etc/nondcesvc
       /opt/dcelocal/hpadmin/etc/wellknownif

SEE ALSO

       nondcesvc(4), wellknownif(4)

HP DCE
																	dceping(8)
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