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vmstat 2 2
mail -s nihao root < test.txt f 323 h 300-310
crontab -l,-e,-r vim /etc/crontab
iptables -A INPUT -p tcp -m multiport --dports 22,80 -m state --state NEW,ESTABLISHED -
j ACCEPT
iptables -t nat -A PREROUTING -d 192.168.238.1 -p tcp --dport 80 -j DNAT --to-
destination 192.168.238.8:8080
iptables -P INPUT DROP
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原文地址:http://www.cnblogs.com/linuxboke/p/5451187.html