I am proficent in Kali, debian and Ubuntu terminal and am able to work this os to even setup a server or compile a kernel on the kali end I can hack into a computer no mater what computer you name it, backdoors wifi bruteforcing sniffing, etc, etc. On the Debain/Ubuntu end I can dev apps make scripts and even dev kernels/ entire oss

I develop apps for Ubuntu, Lubuntu, Ubuntu Studio, Debian, Kali, Linux Mint, and Rasbin