ipcalc:tldr:6f5ea

The command "ipcalc -g ${1-2-3-4}" is used to calculate the network information for a given IPv4 address.

Here's a breakdown of the command:

• "ipcalc" is the name of the command that performs the IP address calculations.
• "-g" is an option flag that specifies to calculate the network information (such as network address, broadcast address, subnet mask, etc.) for the given IP address.
• "${1-2-3-4}" is a placeholder for an IPv4 address. The format "1-2-3-4" represents a sample IP address, but you should replace it with an actual IP address you want to calculate the network information for.

For example, if you want to calculate the network information for the IP address "192.168.0.1", you would use the command: "ipcalc -g 192.168.0.1". The command would then output the network information for that IP address.