网络工具组 iproute2

iproute2 为现代 Linux 发行版自带的软件包，他代替了传统的 net-tools 软件包，后者已经不再维护。

Legacy utility	Replacement command	Note
ifconfig	ip addr, ip link, ip -s	Address and link configuration
[route](https://en.wikipedia.org/wiki/Route_(command) "Route (command)")	ip route	Routing tables
arp	ip neigh	Neighbors
iptunnel	ip tunnel	Tunnels
nameif, ifrename	ip link set name	Rename network interfaces
ipmaddr	ip maddr	Multicast
netstat	ip -s, ss, ip route	Show various networking statistics
brctl	bridge	Handle bridge addresses and devices

由于各种原因，不应再使用旧的 net-tools 包，但 netstat 依然通过其他软件包提供。