I have configured SFTP using openssh version-4.3. I can upload files with the user.
My requirement is to allow other specified users to upload or download the files into the same directory, and restrict some of the users to access the directory.
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You need to set up sftp only chrooted jails per user. Tricky if you’re not an experienced command line linux user. Probably easier to set up proftpd with mod_sftp