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Sunday, February 6, 2011

xdm, pam & fluxbox

I have configured xdm on my Slackware machine to use pam and authentication against LDAP. I won't show you here howto setup LDAP or pam on Slackware, this is more a quickie for xdm - assuming everything else is already setup!

The first thing that need to be done is to grab a copy from the source Patrick uses for xdm. You can
find it on the CD/DVD under the source directory. Then extract the software and recompile xdm with the following commands:

# cp /mnt/dvd/source/x/x11/src/app/xdm-1.1.10.tar.xz /root
# cd /root
# tar xf xdm-1.1.10.tar.xz
# cd xdm-1.1.10
                                                        
Before you continue make sure which architecture you're using. For 32Bit use the following command:

# ./configure --with-pam --prefix=/usr

For 64Bit use this configure command:

# ./configure --with-pam --prefix=/usr --libdir=/usr/lib64

Finally compile and install:                                                                             

# make && make install  

After that your xdm should be linked against libpam:

# ldd /usr/bin/xdm
...
libpam.so.0 => /lib/libpam.so.0 (0xb7525000)
...

Then copy the pam rules for xdm (or create a new set):

# cd /etc/pam.d
# cp login xdm

If you now change the Runlevel from e.g. 3 to 4, then the xdm should appear. When you login as a user then the default window-manager twm will appear. To change the window-manager from twm to fluxbox create a file called .xsession (for the specific user):

$ vi ~/.xsession
setxkbmap -model pc104 -layout de
exec startfluxbox

The first line will change the keyboard layout for the specific user and the second line starts the desired window-manager.