Transferring and synchronizing files securely.
Smart synchronization / excellent mirroring program
Though legendarily-difficult to comprehend, it does work well.
If you are a beginner, AVOID THIS PROGRAM! .. you will hate your life.
NOTE - I have included some very old notes.
- I've been using rsync with good success for backups. See my backup project.
shfs (same idea)
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A real find. Spectacularly easy to get, install and use.
SHell FileSystem Linux kernel module
SSHFS (same idea)