第一步

cp /etc/issue /etc/issue.bak

第二步

在 /etc/rc.local 添加如下程序

cp /etc/issue.bak /etc/issue
echo Server IP:`/sbin/ifconfig | grep "inet addr" | grep -v "127.0.0.1" | awk '{ print $2 }' | awk -F: '{ print $2 }'` >> /etc/issue
echo "" >> /etc/issue

第三步

OK，收工！

Sample