1 of my user were complaining that all of he´s files are accessible by all other shell users and that they can download all files etc. I was trying to find an solution to this, wondered about jailedshell, ftp access only in homedir with proftps etc.

Then i got it, CHMOD 0711 /home/user dir. Now nowone cant list that user dir anymore, other than root and owner! They just got error message: "Error listing directory".

Now, is it possible to CHMOD "something" the very root of the server, that no one cant list my server files? Can i do same to /home dir, does this effect anyhow to users?

No. If you do it to your root directory, a lot of programs will have problems running.

Ah ok, whatabout if i manually chmod all roots subdirs and take off that "default - read". Like this:

Now: /bin is 755
New chmod to: /bin 711

And then do the same to /etc /boot /usr /var etc.
Does this mess up the system also?

If this works then they cant see any system files, right?

/etc is a VERY BAD IDEA it has the shadow file and password file

some stuff like /usr wont be effected or /var, but why you wanna do that? these are the default files on all servers, so no use of hiding them, knowing the location of the file wont change anything.

OK. I just did:

CHMOD /home 0771
CHMOD /home/allusers 0711
And some backup and temp folders.

Seems to work fine, and this was what i were looking for.
Thx Bashar and sprintserve.

yeah thats fine :)

btw 0711 = 711

here is an article i wrote few years back :D
http://www.defcon1.org/html/Software_Articles/Learning-CHMOD/learning-chmod.html

The first bit is a sticky bit. With it on, it's more secure as only the file owner and the superuser (read as root) can delete the file.

i've been doing this for more than a year