inxi is used to get an overview of a mint-system, without using multiple system-tools (and to prevent potential wrong guessing). The parameters are used to filter the information-details returned from it.
The output of inxi gets normally displayed on the terminal and will be too long to paste it directly to the IRC-channel. At #linuxmint-help the 'mintbotd' will prevent this 'flooding' of the channel, by muting according people for some time = you wont be able to write at the channel at all for this time.
To give supporters a 'copy' of the output, one would have to manually paste it to some common paste-service and return the according url here. For your ease, the output of inxi is redirected (using the pipe-symbol '|') to a second tool, which will do the transfer to a trustworthy paste-service for you and directly return the according url, which you should share/copy to the IRC-channel.
|inxi -Fxxrzc0|nc termbin.com 9999||a general system overview - personal data is excluded|
|inxi -Nxxrzc0|nc termbin.com 9999||networking only|
|inxi -Sxx||just a minimal system-info / normally not shared = just for you to know which version + edition (cinnamon,xfce,mate) of mint you are running|
|IRC:copy-paste.htm||copy&paste commands and output between hexchat and terminal|