In Linux use use AND Operators and it is represented by (&). In commands we can either use (&&) or (;). So, does a semi Colon (;) is also called an AND Operator?
No, a semicolon is not a boolean operator. It is however, just like
&, and newlines, a command terminator, marking the end of a command.
The difference between
cmd1 && cmd2
is that in the first case,
cmd2 will always execute after
cmd1 has terminated, while in the second case,
cmd2 only executes if
cmd1 terminated with a zero exit status (signalling "success").
cmd1 & cmd2
cmd1 is started as a background job (an asynchronous task), and
cmd2 is started immediately after starting
cmd1 (the two would run concurrently).
; are called "list separators", separating lists of commands. In the POSIX shell grammar, they are called "separator operators".