This ip command guide is a follow-up of my previous 90 Linux Commands frequently used by Linux Sysadmins article. Every week, or as time allows, I will publish articles on the ~ 90 commands geared toward Linux sysadmins and Linux power users. Let’s continue this series with the
For Linux sysadmins, it is crucial to have a basic understanding of networking tools when managing and troubleshooting Linux servers. While we’ve covered some tools made primarily for monitoring, iproute2 and specifically the
IP command is used to configure, view, and modify network settings.
iproute2 is a Linux networking toolkit that replaced net-tools (including
route). Instead of using a separate tool for every aspect of network management, with IPRoute2, sysadmins now have a unified interface.
The iproute2 contains the following command-line utilities:
tipc. Most of the networking functionality is consolidated into the
ip command. There’s also
tc for managing traffic policies (QoS), and
ss which replaced
IP command with examples
ip command is a part of the iproute2 package that is installed on all modern Linux distributions. This suite of networking commands allows system administrators to adjust addresses, link-state, neighbor objects, routing tables, and manage other network components. The
ip command also provides access to VRF, network namespaces, policy-based routing, and so on. It offers a uniform syntax.
IP command examples:
To list interfaces with detailed info, use:
To list interfaces with brief network layer info, use:
ip -brief address
To list interfaces with brief link layer info, use:
ip -brief link
To display the routing table, use:
To show neighbors (ARP table), use:
To make an interface up/down, use:
ip link set interface up/down
To add/delete an ip address to an interface, use:
ip addr add/del ip/mask dev interface
To add a default route, use:
ip route add default via ip dev interface
IP command & iproute2 useful reading:
- Task-centered iproute2 user guide.
- IP command cheat sheet.
- Linux Advanced Routing & Traffic Control HOWTO.
IProute2 and the IP command are essential to Linux network management. We should know how to use the commands to assist in network and system administration.