Linux renew ip command using DHCP

The -r flag explicitly releases the current lease, and once the lease has been released, the client exits. For example, open terminal application and type the command:

$ sudo dhclient -r

Now obtain fresh IP address using DHCP on Linux:

$ sudo dhclient

Nftable

The nftables framework provides packet classification facilities. The most notable features are:

• built-in lookup tables instead of linear processing
• a single framework for both the IPv4 and IPv6 protocols
• rules all applied atomically instead of fetching, updating, and storing a complete rule set
• support for debugging and tracing in the rule set (nftrace) and monitoring trace events (in the nft tool)
• more consistent and compact syntax, no protocol-specific extensions
• a Netlink API for third-party applications

The nftables framework uses tables to store chains. The chains contain individual rules for performing actions. The libnftnl library can be used for low-level interaction with nftables Netlink API over the libmnl library.

To display the effect of rule set changes, use the nft list ruleset command. Since these tools add tables, chains, rules, sets, and other objects to the nftables rule set, be aware that nftables rule-set operations, such as the nft flush ruleset command, might affect rule sets installed using the formerly separate legacy commands.