Ysk, the unicode number for ™ is 0x2122. You can type any unicode hexcode on linux by pressing Ctrl+shift+u followed by typing the code then pressing enter.

While I’m here, a couple other easy and handy unicodes to remember: en dash: – 0x2013 em dash: — 0x2014

Most people use a normal dash instead of these, but en and em dashes are technically more correct in some cases

I’m confused. Are you talking about power over ethernet or power-line ethernet?