Appending a Line to a File with COPY Con or ECHO

You can add a line to the end of a file, such as your CONFIG.SYS file, without using an editor if you use the COPY command in the following form:

Copy echoes FILENAME.EXT as it is copied, then it echoes CON and the cursor to show that it is now copying from the CONsole. For example: This causes MS-DOS to echo CONFIG.SYS and CON, with the cursor. Enter the text to be added to the file, then press CTRL+Z and ENTER to end your modification. The following example adds a line to the end of CONFIG.SYS: If only one line is to be added and that line doesn't contain any redirection, you can also use the ECHO command as follows: NOTE: If the last line of the text file does not contain a carriage return, the line being added is appended to the end of the last line.