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Safely make network change

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If you're working on a remote server, you may want to try something like this to make a network change so it'll change back if you get disconnected.
#!/bin/bash
file='/etc/sysconfig/network-scripts/ifcfg-eth0'
cp -a "${file}" "${file}_backup"
sed -i 's/192.168.123./100.100.100./g' "${file}"
ifdown eth0; ifup eth0
sleep 100
/bin/mv "${file}_backup" "${file}"
ifdown eth0; ifup eth0
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rob

rob

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