No such file or directory: auth_shadow_module:Unable to exec
                
                Brought to you by:
                
                    bduggan
                    
                
            
            
        
        
        
    The following is reported after configuring Apache
(2.0.52) to use mod_auth_shadow from mod_auth_shadow-
2.1-1.i386.rpm 
[Wed Jan 11 16:59:58 2006] [emerg] (2)No such file or 
directory: auth_shadow_module: Unable to exec. Error: 2
It appears the makefile and mod_auth_shadow.spec file 
differ in the install location for executable 
validate. Moving a version to the location designated 
by the makefile corrected the problem. 
makefile:INSTBINDIR = /usr/local/sbin
mod_auth_shadow.spec:%attr
(4755,root,root) /usr/sbin/validate
Logged In: YES
user_id=90256
Also had this problem, RedHat 9 (recompiled .src.rpm). I
fixed it like this:
ln /usr/sbin/validate /usr/local/sbin/