Master Linux Network Management with the Powerful ip Command

The ip command in Linux replaces the older ifconfig tool, offering more powerful network management capabilities as part of the iproute2 suite, which is pre‑installed on most distributions.

To install iproute2 manually, download the package or clone the source:

git clone https://kernel.googlesource.com/pub/scm/linux/kernel/git/shemminger/iproute2.git

Setting and Deleting IP Addresses

Assign an address to an interface: sudo ip addr add 192.168.0.193/24 dev wlan0 Verify the assignment: ip addr show wlan0 Remove the address by replacing add with del:

sudo ip addr del 192.168.0.193/24 dev wlan0

Listing Routing Table Entries

Display the current routing table: ip route show Query the route a specific destination would take:

ip route get 10.42.0.47

Changing the Default Route

Add a new default gateway:

sudo ip route add default via 192.168.0.196

Displaying Network Statistics

Show statistics for a particular interface (e.g., p2p1) with detailed counters:

ip -s -s link ls p2p1

ARP Entries

List ARP (neighbour) entries to see MAC addresses associated with IPs on the local network:

ip neighbour

Monitoring Netlink Messages

Watch real‑time netlink events for all interfaces:

ip monitor all

Activating and Deactivating Interfaces

Bring an interface up or down, similar to ifconfig:

sudo ip link set ppp0 down

sudo ip link set ppp0 up

Getting Help

Use the help option for command‑specific assistance, e.g.:

ip route help

Conclusion

The ip command is an essential tool for Linux administrators and script writers, offering a modern replacement for ifconfig with extensive functionality for configuring and troubleshooting network interfaces.