1 Short: a 2 Long: append 3 Help: Append to target file when uploading 4 Protocols: FTP SFTP 5 --- 6 When used in an upload, this makes curl append to the target file instead of 7 overwriting it. If the remote file doesn't exist, it will be created. Note 8 that this flag is ignored by some SFTP servers (including OpenSSH). 9