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Full Discussion: How to run a shell script in background without showing in the terminal?
Top Forums UNIX for Beginners Questions & Answers How to run a shell script in background without showing in the terminal? Post 302986420 by apmcd47 on Friday 25th of November 2016 04:31:21 AM
Old 11-25-2016
Try this
Code:
pingfunc ()
{
for (( i=$a; i<=$b; i++ ))
do 
/bin/ping -c 1 $c$i > /dev/null 2>&1 && echo $c$i is pingable || echo no answer from $c$i
done
}

I have changed the count from 4 to 1 on the grounds that unless you have a really bad network one ping is enough.
The redirection gets rid of the verbose output from the ping utility.
I've added the IP address to the output so you can see at a glance which machine is pingable.

Alternatively if you need the four pings per machine try this instead:
Code:
/bin/ping -c 4 -i 0.2 $c$i > /dev/null 2>&1 && echo $c$i is pingable || echo no answer from $c$i

This will alter the interval between pings. According to the manual 0.2 seconds is the smallest interval a normal user can specify.

None of the above backgrounds the process but it should certainly be faster than before.

Andrew
This User Gave Thanks to apmcd47 For This Post:
Meeran Rizvi
 

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LEARN ABOUT SUNOS

jms-ping

asadmin-jms-ping(1AS)						   User Commands					     asadmin-jms-ping(1AS)

NAME

       jms-ping  - checks to see if the JMS provider is up and running

SYNOPSIS

       jms-ping   --user  admin_user  [--password  admin_password]  [--host  localhost]  [--port  4848]  [--passwordfile  filename]  [--secure|-s]
       [--terse=false] [--echo=false] [--interactive=false]

       Checks to see if the JMS provider is up and running. This command is supported in remote mode only.

OPTIONS

       --user		       authorized domain application server administrative username.

       --password	       password to administer the domain application server.

       --host		       machine name where the domain application server is running.

       --port		       port number of the domain application server listening for administration requests.

       --passwordfile	       file containing the domain application server password.

       --secure 	       if true, uses SSL/TLS to communicate with the domain application server.

       --terse		       indicates that any output data must be very concise, typically avoiding human-friendly sentences and favoring well-
			       formatted data for consumption by a script. Default is false.

       --echo		       setting to true will echo the command line statement on the standard output. Default is false.

       --interactive	       if set to true (default), only the required password options are prompted.

       Example 1: Using jms-ping

       asadmin> jms-ping --user admin --password adminadmin --host bluestar --port 4848 server1
       JMS Ping Status=RUNNING

EXIT STATUS

       0		       command executed successfully

       1		       error in executing the command

       asadmin-create-jmsdest(1AS), asadmin-delete-jmsdest(1AS), asadmin-list-jmsdest(1AS)

J2EE 1.4 SDK							    March 2004						     asadmin-jms-ping(1AS)
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