ftp append
Appends a local file to a file on the remote computer using the current file type setting. Windows commands reference
On Windows
Windows
append <localfile> [remotefile]append file1.txt file2.txtappend file1.txt
<localfile>Specifies the local file to add.[remotefile]Specifies the file on the remote computer to which <localfile> is added. If you don't use this parameter, the <localfile> name is used in place of the remote file name.