Jailkit

If you're looking for a great way to set up user accounts and limit them to certain files or commands, then you might want to check out the Jailkit project. With this set of utilities, you can quickly and easily create chroot shells or limit specific commands for your users. Whether you need to set up a CVS server, an sftp/scp server, or just want to add an extra layer of security to your general servers, Jailkit has you covered.

One of the most useful things about Jailkit is that it can be used to jail daemon processes. This means you can keep processes like apache servers, bzflag servers, and squid proxy servers in their own secure environment. Whether you're a developer or a system administrator, having this kind of flexibility can be a real lifesaver.

So how do you get started with Jailkit? Installing it is actually quite simple. Just run the following commands:

./configure
make
su root
make install

Once you've installed Jailkit, you'll need to copy the startup script to your init directory. If you're using Debian, you'll do this by running:

cp extra/jailkit /etc/init.d/jailkit

Finally, you'll need to create the right symlinks so that Jailkit starts up correctly when you reboot. On Debian systems, you can do this by running:

update-rc.d jailkit defaults

On Red Hat/Fedora systems, the command is slightly different:

chkconfig jailkit on

Overall, we think Jailkit is a great set of utilities for anyone who needs to limit user accounts or jail daemon processes. Give it a try and see what you think!