scenario: copy a virtual linux system and give the new system another ip address

1) find out the new mac adress ( for example in vmware settings)
2) disconnect network interface and boot up the system
3) make changes in this files
---- /etc/hosts #maybe change ip
---- /etc/sysconfig/network-scirpts/ifcfg-eth0 #change mac to new mac + ip
---- /etc/udev/rules.d/70-persistent-net-rules #change mac to new mac
4) shutdown system
5) connect interface > start system > ping + tests

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