Check success of remote file append via ssh

I like to periodically append some data to a remote file via ssh and remove it locally. Like:

cat some_lines_to_append.txt | ssh user@example.com 'cat >> all_lines_collected.txt'
rm some_lines_to_append.txt

Now I like to make sure some_lines_to_append.txt is only removed, if the lines where successfully transfered. How to do that?

Does >> create some sort of error return code by itself on failure, or does cat in this case, and will ssh deliver that return code?

Will shh itself deliver non-zero return codes in any occasion that it was finished prematurely?

Answer

cat some_lines_to_append.txt |
   ssh user@example.com 'cat >> all_lines_collected.txt' &&
   rm some_lines_to_append.txt ||
   echo 'Error occurred.'

Attribution
Source : Link , Question Author : dronus , Answer Author : Alex