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sudo vi /etc/sysconfig/network

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NETWORKING=yes

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NETWORKING=no

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sudo service --status-all

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sudo systemctl disable [service-name]

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sudo systemctl disable telnet

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sudo vi /etc/sysctl.conf

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# ½ûÓÃIPv6
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

# ½ûÓÃICMP Redirect
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.all.accept_redirects = 0

# ½ûÓÃIPת·¢
net.ipv4.ip_forward = 0

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sudo sysctl -p

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sudo reboot

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