[root@Jaking vsftpd]# vim /etc/sysctl.conf 
# sysctl settings are defined through files in
# /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/.
#
# Vendors settings live in /usr/lib/sysctl.d/.
# To override a whole file, create a new file with the same in
# /etc/sysctl.d/ and put new settings there. To override
# only specific settings, add a file with a lexically later
# name in /etc/sysctl.d/ and put new settings there.
#
# For more information, see sysctl.conf(5) and sysctl.d(5).

net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
                                              
[root@Jaking vsftpd]# ifconfig
# IPV6 字段 inet6 fe80::250:56ff:fe22:db62
ens33: flags=4163  mtu 1500
        inet 192.168.10.11  netmask 255.255.255.0  broadcast 192.168.10.255
        inet6 fe80::250:56ff:fe22:db62  prefixlen 64  scopeid 0x20
        ether 00:50:56:22:db:62  txqueuelen 1000  (Ethernet)
        RX packets 11717  bytes 4355183 (4.1 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6943  bytes 2011730 (1.9 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10
        loop  txqueuelen 1  (Local Loopback)
        RX packets 112  bytes 9492 (9.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 112  bytes 9492 (9.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@Jaking vsftpd]# sysctl -p  #让配置文件立即生效
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
[root@Jaking vsftpd]# ifconfig 
# IPV6 字段已经消失
ens33: flags=4163  mtu 1500
        inet 192.168.10.11  netmask 255.255.255.0  broadcast 192.168.10.255
        ether 00:50:56:22:db:62  txqueuelen 1000  (Ethernet)
        RX packets 11747  bytes 4357703 (4.1 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6961  bytes 2014592 (1.9 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        loop  txqueuelen 1  (Local Loopback)
        RX packets 112  bytes 9492 (9.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 112  bytes 9492 (9.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

以上就是 Linux 系统如何禁用 IPV6 的方法，希望能给大家带来帮助。

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