append Switch
The append switch causes the file being
transferred to be appended to the end of the destination file, if it already
exists on the destination system. If the file doesn't already exist, it will be
transferred as normal (i.e., a new file will be created).
The append switch can be used with these file transfer commands:
kermit send, kermit receive,
ztransmit and zreceive
You may not use the append switch
at the same time as the different, hash, longernewer,
newer, or nodelete
switches.