How many gcse do you need to be a bin man?
Maths at A*
Any language at grade E
There are literally hundreds of them. Far too many to even summarize them in this forum. List the /bin /usr/bin directories for terminal commands. Frequently customized 'commands' or other software will be found in /usr/local/bin (for global execs, user specific binaries will most often be in the user's 'bin' directory... eg /home/user_account_name/bin). If you see a 'command' that you are unfamiliar with, you can check it's manual page, usually referred to as 'man page' by…