REM signifies a comment or REMARK
In a batch file adding REM at the start of a line will prevent most commands from executing. REM can also be used to add comments to the config.nt file.
In a batch file adding :: at the start of a line will prevent any commands (on that line) from executing
:: My Batch File
:: Date Created
:: Usage information
Equivalent Linux BASH commands:
### - Comment / Remark