Have you ever bind a large of ip address for your CentOS?If your answer is yes, you must have seen some informations like this: What a anti-human decision to determining a large of ip address in use on boot.In CentOS, /etc/init.d/network run ifup to bring up your interface, fortunately, ifup is not a binary file but a shell script, so we have a chance to remove this anti-human function.Change dir to /etc/sysconfig/network-scripts/ and run ls, we can see several ifup script:ifup
ifup-aliases
ifup-bnep
ifup-eth
ifup-ippp
ifup-ipv6
ifup-ippp
ifup-plip
ifup-plusb
ifup-post
ifup-ppp
ifup-route
...
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