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I want to block users from changing directories when they log in via scponly's shell. How can I do that? I need to be able to provide users with their own upload directory that only they can see and read/write. They should not be allowed to execute any code, ie, change directories or the like.

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chrooted scponly might be what you're looking for.

if you use debian/ubuntu - when installing scponly you will be asked which version you want.

also read here.

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+1 And you can run dpkg-reconfigure scponly if you're not running the chrooted version – kaerast Jun 6 '10 at 21:16
The scoponly documentation says "if you don't know what chrooting is, don't do it." I don't know what it is-- where's a good place to start looking? – mmr Jun 6 '10 at 21:18
@mmr - in essence making small environment - a jail - out of which process cannot go above [ you just make /some/dir/ to appear as root of filesystem for a process [eg scp server]]. dont worry - just follow the tutorial. – pQd Jun 6 '10 at 21:49
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