BASH Shell scripting help

ewarmour · 05-22-2002, 03:07 PM

I want to make shell script that takes a list of host names on my network as command line arguments and displays whether the hosts are up or down, using the ping command to display the status of a host and a for loop to process all the host names. Im new to shell scripting so Im not quite sure where to start with this. Thanks for any help -E

neo77777 · 05-22-2002, 10:54 PM

you can use a perl script
usage script file count
#!/usr/bin/perl
($file, $n) = @ARGV; # $n is used by ping to expire after sending
# $n packets
print "$file \n";
print "count $n \n";
open (FH, "$file") or die "Cannot open $file:$!\n";
while(<FH>){
system ("ping -c$n $_");
}
close FH;

Mik · 05-23-2002, 03:40 AM

Here is a bash script that I use which does the same.

Code:

#!/bin/sh

checkhost()
{
  echo "Checking host $1..."
  ping -c 2 $1 &> /dev/null

  if [ $? == 0 ]
  then
    echo "$1 is running"
  else
    echo "$1 is not reachable"
  fi
}

HOSTLIST="host1 host2"

for hostname in $HOSTLIST
do
  checkhost $hostname
done

Brion · 05-23-2002, 04:00 AM

http://www.tldp.org/LDP/abs/html/index.html

here u can find a book that teaches u everything u need to know about bash scripting

ewarmour · 05-23-2002, 10:05 AM

Thanks for the help you guys. Good stuff. -E

ewarmour · 05-23-2002, 10:28 AM

Thanks again for the help -E

vfs · 05-24-2002, 08:01 AM

I realize why should one post so much the same!

I replied a similar message some minutes ago, from the same guy.

If I knew he had this bunch of answers, I'd save my time looking other msgs...

Damn!

vfs

acid_kewpie · 05-24-2002, 12:31 PM

well that's why you should NEVER reply to posts that have already been identified as doubleposts.... only makes you look dumb!

vfs · 05-25-2002, 07:10 AM

I didn't see any mention about double/crossposting. If I did, I surely wouldn't answer... Maybe I'm growing blind

vfs