Bash script - sed trouble

[tivalat]

I have a exercise. I tried it but it has problems that I can't deal with.

Would you please help me?

Here is codes

#!/bin/bash
# network status check
# parameter 1: ip

while [ 1 ]; do

        if ping -c 10 $1
        then
                echo 'Network ok!'
        else
                ifdown eth0

                # back up eth1 config
                cp /etc/sysconfig/network-scripts/ifcfg-eth1 /etc/sysconfig/network-scripts/ifcfg-eth1.bak

                # copy eth0 config to eth1 config
                sed 's/eth0/eth1/' </etc/sysconfig/network-scripts/ifcfg-eth0
>/etc/sysconfig/network-scripts/ifcfg-eth1

                ifup eth1
                logger -f /var/log/message 'Card eth0 down, switching to eth1'
        fi

sleep 15
done

I see errors when running it but it's success if test with enter commands one by one.

I guess it's due to sed command.

[Cabhan]

Homework problems are not allowed as per the forum rules:
http://www.linuxforums.org/forum/lin...ums-rules.html

I suggest taking the exact error that you are encountering and try googling for it.