nft:tldr:57b69

This command is used to delete a specific rule from the nftables firewall configuration using the "sudo" command to execute it with administrative privileges.

Here's how to break it down:

• "sudo": This command is used to run the following command as a superuser, granting the necessary permissions to modify the nftables rules.
• "nft": This is the command-line tool for managing and interacting with the nftables firewall.
• "delete rule": This phrase specifies that we want to delete a rule from the firewall configuration.
• "${inet} ${filter} ${input}": These are variables that represent the family, table, and chain of the rule to be deleted. The "${inet}" typically refers to the "afinet" (IPv4) or "afinet6" (IPv6) family, "${filter}" represents the default table for filtering rules, and "${input}" is the chain in which the rule is located. These values may vary depending on the specific firewall configuration.
• "handle ${3}": Here, "handle" is a keyword that indicates the identification number of the rule, and "${3}" is a variable containing the specific handle of the rule you want to delete. The number "3" represents the handle ID, which could also differ in your case.

Overall, this command deletes a specific rule from the nftables firewall configuration based on the provided variables for family, table, chain, and rule handle.