如禁用ipv6

vim /etc/sysctl.d/99-sysctl.conf

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1

sysctl -p

修复重启失效

/etc/rc.local

#!/bin/bash
# /etc/rc.local

# Load kernel variables from /etc/sysctl.d
/etc/init.d/procps restart

exit 0

chmod 755 /etc/rc.local