我要评论1.临时更改,即时生效.
[root@freebsd7]# ifconfig
le0: flags=8843<up,broadcast,running,simplex,multicast> metric 0 mtu 1500
options=8<vlan_mtu>
ether 00:0c:29:21:2d:a6
inet 192.168.1.106 netmask 0xffffff00 broadcast 192.168.1.255
media: ethernet autoselect
status: active
plip0: flags=108810<pointopoint,simplex,multicast,needsgiant> metric 0 mtu 1500
lo0: flags=8049<up,loopback,running,multicast> metric 0 mtu 16384
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
inet6 ::1 prefixlen 128
inet 127.0.0.1 netmask 0xff000000
freebsd# ifconfig le0 10.0.0.123 netmask 255.255.255.0
这种方法即时生效，但是重启机器后，信息不保留。
2.永久保留.
打开/etc/rc.conf
加入或修改：ifconfig_网卡名称="inet x.x.x.x netmask x.x.x.x"
之后 reboot 或 #sh /etc/rc
freebsd# more /etc/rc.conf
# -- sysinstall generated deltas -- # thu oct 12 09:37:56 2006
# created: thu oct 12 09:37:56 2006
# enable network daemons for user convenience.
# please make all changes to this file, not to /etc/defaults/rc.conf.
# this file now contains just the overrides from /etc/defaults/rc.conf.
defaultrouter="10.0.0.1"
hostname="freebsd.rhel5.com"
ifconfig_lnc0="inet 10.0.0.123 netmask 255.255.255.0"
keymap="us.iso"
linux_enable="yes"
sshd_enable="yes"
freebsd#
这种方法，信息永久保留，但是修改完需要重启机器。
如果要设置多ip地址可用别名方式作修改如下
ifconfig_lnc0="inet 10.0.0.199 netmask 255.255.255.0"
改为
ifconfig_lnc0_alias0="inet 10.0.0.198 netmask 255.255.255.0"
ifconfig_lnc0_alias1="inet 10.0.0.197 netmask 255.255.255.0"
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