1234567891011121314151617181920source /etc/network/interfaces.d/*# The loopback network interfaceaut 1234567891011121314151617181920source /etc/network/interfaces.d/*# The loopback network interfaceauto loiface lo inet loopback# The primary
1234567891011121314151617181920source /etc/network/interfaces.d/*# The loopback network interfaceaut
1234567891011121314151617181920source /etc/network/interfaces.d/*# The loopback network interfaceauto loiface lo inet loopback# The primary network interfaceauto eth0iface eth0 inet static address xx.xx.xx.xx/24 gateway 173.255.241.1 dns-nameservers 173.230.155.5 173.255.212.5 173.255.219.5 dns-search members.linode.com dns-options rotate# This is an autoconfigured IPv6 interfaceiface eth0 inet6 autoup ip addr add 192.168.193.184/17 dev eth0 label eth0:1down ip addr del 192.168.193.184/17 dev eth0 label eth0:1我在linode后台考了私有地址，上面配置文件那最后两行，up和down的是什么意思？私有地址没生效，ifconfig没有。
