>Usage
The ip command is used for managing network interfaces, IP addresses, routing tables, and network devices on Linux and other Unix-like operating systems. It's part of the iproute2 suite, which is preferred over older commands like "ifconfig" for modern network management tasks, as ip provides additional functionalities and a more consistent syntax.
>Synopsis
>Options
link
The command ip link displays or modifies network device properties, such as interface status (up or down), MAC address, MTU (Maximum Transmission Unit), etc. It is used to check the status or configuration of network interfaces or to bring them up/down.
Example:
link
> ip link
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500
qdisc pfifo_fast state UP group default qlen 1000
link/ether 08:00:27:b5:29:64 brd ff:ff:ff:ff:ff:ff
addr del
The command addr del removes an IP address from a network interface.
Example:
addr del
>ip addr del 192.168.1.20/24 dev eth0
(no output if successful)
This command removes the IP address 192.168.1.20/24 from
the eth0 interface.
route
The command ip route is used to show and
manage routing tables. You can use
ip route list [selector] to narrow down the
search.
Example:
route
> $ ip route show
default via 192.168.1.1 dev eth0
192.168.1.0/24 dev eth0
scope link
link set dev
The command
ip link set dev <interface> address is
used to change the MAC address of a network interface.
Example 1:
link set dev
>$ ip link set dev eth0 address 00:11:22:33:44:55
This changes the MAC address of eth0 to 00:11:22:33:44:55.
neigh
The command neigh allows you to view, add,
delete, or modify entries in the neighbor cache, which is
essential for resolving IP addresses to MAC addresses for
communication on a local network.
Its basic syntax being: ip neigh [OPTION] [COMMAND] [ADDRESS]
The neigh option of the ip command in Unix is used to manage the
Neighbor Table, also known as the ARP (Address Resolution
Protocol) Table for IPv4 or the NDP (Neighbor Discovery
Protocol) Table for IPv6.
This table is used to map network-layer addresses (such as IP
addresses) to link-layer addresses (such as MAC addresses).
Example:
neigh
$ ip neigh show
192.168.1.1 dev eth0 lladdr 00:14:22:01:23:45 STALE
192.168.1.100 dev eth0 lladdr 00:14:22:67:89:ab
REACHABLE
192.168.1.200 dev eth0 lladdr
00:14:22:cd:ef:01 DELAY