Linux command
dhcpcd 命令
安全
权限或系统影响较大，执行前请核对目标。
常用示例
Obtain a lease
sudo dhcpcd [eth0]
Release
sudo dhcpcd -k
Request
sudo dhcpcd -n
Configure IPv4 only
sudo dhcpcd -4 [eth0]
Configure IPv6 only
sudo dhcpcd -6 [eth0]
Test mode
sudo dhcpcd -T [eth0]
说明
dhcpcd is a DHCP and DHCPv6 client daemon that automatically configures network interfaces. It obtains IP addresses, default routes, and DNS servers from DHCP servers on the network, and can also process IPv6 Router Advertisements for stateless autoconfiguration. The daemon runs in the background managing network configuration as interfaces come up and down. It handles lease renewal, rebinding, and release operations automatically. Configuration hooks allow running custom scripts when network state changes. dhcpcd is commonly used as the default network configuration tool on many Linux distributions, particularly those without NetworkManager. It's lightweight, follows RFC standards closely, and integrates well with embedded and server environments.
参数
- -k, --release
- Release current leases and exit
- -n, --rebind
- Request new leases (rebind)
- -x, --exit
- Exit daemon
- -d, --debug
- Debug mode (don't fork)
- -B, --nobackground
- Don't run in background
- -4, --ipv4only
- Only configure IPv4
- -6, --ipv6only
- Only configure IPv6
- -b, --background
- Background immediately
- -S, --static _value_
- Configure a static DHCP value (e.g., ip_address, routers, domain_name_servers)
- -s, --inform _address_
- Send DHCP INFORM instead of DISCOVER/REQUEST
- -T, --test
- Test mode, don't configure interfaces
FAQ
What is the dhcpcd command used for?
dhcpcd is a DHCP and DHCPv6 client daemon that automatically configures network interfaces. It obtains IP addresses, default routes, and DNS servers from DHCP servers on the network, and can also process IPv6 Router Advertisements for stateless autoconfiguration. The daemon runs in the background managing network configuration as interfaces come up and down. It handles lease renewal, rebinding, and release operations automatically. Configuration hooks allow running custom scripts when network state changes. dhcpcd is commonly used as the default network configuration tool on many Linux distributions, particularly those without NetworkManager. It's lightweight, follows RFC standards closely, and integrates well with embedded and server environments.
How do I run a basic dhcpcd example?
Run `sudo dhcpcd [eth0]` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does -k, --release do in dhcpcd?
Release current leases and exit