UNIX for Dummies Questions & Answers

Hi everone!
My computer is ultra80,Operation system 2.6,when I boot get a message "WARNING: ap: no database locations "
And then I can login root , but for other user can`t login and had message "no shell". I use csh,after login root when I su -user also had "noshell". /etc/passwd ,shadow /usr/bin/csh are no problem!
Thanks for your hel

Check the permissions on:
/
/usr
/usr/bin
/usr/bin/csh

My guess is that somehow ordinary users can't read csh or they can't execute it.

Mr Perderabo
I login root ,I see / /usr /usr/bin /usr/bin/csh are can permit execute ,I chmod all to 644. can you give me other advise

Thanks for your help

That is wrong.

chmod 755 / /usr /usr/bin
chmod 555 /usr/bin/csh

perderabo is very right...

644 permissions on / will prevent any users from logging in. You must have execute permissions on / for access to the /etc/passwd which is under / filesystem.

I know b/c I accidentally did this and had my production box down for 3+ hours for my stoopid mistake....

For directories it is 'seach permissions' not 'execute permissions' ... you don't execute directories..

The no shell error message is due to your machine not having the users shell, the reason you can log with csh is propebly because csh is install on your machine and no other shell

for example user can be using ksh, sh or bash which are not install hence error message.

to find out what shell are installed on your machine check /bin or /usr/bin directory
if the shells are installed and still receiving error messages edit /etc/shells file and put the path to shell in the file.