Post Syndicated from original https://lwn.net/Articles/890734/

OpenSSH 9.0 has been released. It is claimed to be primarily a bug-fix
release, but it also switches to a new, quantum-computer-proof key-exchange
protocol by default and includes a number of sftp changes, some of
which may create some compatibility issues (described in the announcement)
with scp.

We consider the removal of the need for double-quoting shell
characters in file names to be a benefit and do not intend to
introduce bug-compatibility for legacy scp/rcp in scp(1) when using
the SFTP protocol.