I transfer files through ssh, from one computer to another. Is there any way I receive a notification on my computer when someone tries to transfer files via ssh?
Didn't try by myself, but it should be possible to wrap the sftp executable. (check sshd_config for something like:
Subsystem sftp /usr/libexec/openssh/sftp-server). It doesn't look to be setuid, so it can be a shell script wrapper. The rest depends on how it is called.