Good afternoon! I am totally new and I do not have much idea about some things. I put you in a situation, I have a VPS with Ubuntu 14.04, recently I had some security problems for certain users that, of course, are already solved. The fact is that since then, I want to have more security, so I opted to cage the invited users so they can only use their / home. So far so good, I used a tutorial (https://gnupatagonia.com.ar/enjaular-usuarios-sftp/) and the truth is, quite simple. The problem is this: I would like Guest Users to also have access to the console (shell) but I want them to only have access to their / home too.
I have Webmin, I looked at the configuration of the users and for example, I changed the type of shell, since with the command that I used it was put in / bin / false. I edited it and set it in / bin / dash and it did not work, I kept testing with / bin / sh and neither, I did not see much hope.

This appear when I open a shell with the Guest User: http://subefotos.com/ver/?dedea4ac18...8e753f591o.png

Thanks in advance!

And sorry for my english

Welcome to LQ

When you modified the user's login shell, did you also supply the ~/.profile and ~/.<shell>rc files? (I don't know what sh uses, it would be ~/.bashrc if the login shell was bash)?
You can also specify the home directory in webmin. It's apparently not set correctly for the user and/or it has the wrong permissions. (Linux will say "No such file or directory" when the file or directory exists, but the user doesn't have permissions to see it)

Does the home directory exist? What are it's permissions? PS Your English is good.

I use this command to create the user;
sudo useradd -g usuariossftp -s /bin/false -d /home/sftp/usuario1 usuario1
sudo passwd usuario
I give all permission to the directory's user with this:
sudo mkdir /home/sftp/usuario1/archivos
sudo chown usuario1:usuariossftp /home/sftp/usuario1/archivos
And yes, it work perfectly, he only can upload, download or remove files if they are on him directory.

I know that with -s /bin/false he can't use the shell, but if I change it to -s /bin/dash or something like this, he can't open a SFTP channel, and the shell can't use too.

I dont understand what do you mean with: ~/.profile and ~/.<shell>rc files?

I'm pretty sure one can't access the shell via sftp. Is that what you're trying to configure?

It looks like you've set the users home directory to /home/sftp/usuario1
But then configured the directory /home/sftp/usuario1/archivos
Who owns /home/sftp/usuario1?
The user's home directory is the same for both ssh and sftp...I think.

Shell home directories usually contain a .profile and/or a .somethingrc file (for bash, it's .bashrc) that set up the environment. Are those present in the home directory?