LINUX

Q:

When I try to compile cfd I get this error

 /usr/lib/libwrap.a(options.o): In function `twist_option':
 options.o(.text+0x5f7): undefined reference to `deny_severity'
 /usr/lib/libwrap.a(options.o): In function `severity_option':
 options.o(.text+0x808): undefined reference to `deny_severity'
 options.o(.text+0x81c): undefined reference to `deny_severity'
 options.o(.text+0x821): undefined reference to `deny_severity'
 options.o(.text+0x826): undefined reference to `deny_severity'
 options.o(.text+0x82b): undefined reference to `allow_severity'
 make[1]: *** [cfd] Error 1

A:

There seems to be a problem with the distributed version of the TCP wrappers library. Edit the `src/conf.h' file and comment out the `#define HAVE_LIBWRAP 1' line. This means that you will not be able to use TCP wrappers security however. You might prefer to collect and compile a new version of TCP wrappers.

Q:

I keep getting segmentation fault from my cfengine scripts when I install a completely new machine.

A:

There is a bug (apparently in Linux) which means that undefined groups cause a segmentation fault. If a group is not in `/etc/group' or in the NIS database, you should only get an error message, but linux generates a core dump. I don't know of any fix except to edit group file manually before running cfengine, or place a fix in editfiles and have this run before files, directories etc, which make reference to the group.

Q:

Linux insists on rebuilding the message of the day file each time it boots, but that means I keep losing the messages I leave there.

A:

Add the following to your configuration files to comment out the offending lines in the startup scripts:

editfiles:

   linux::

    { /etc/rc.d/rc.S
 
    HashCommentLinesContaining "motd"
    }

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