This is the master daemon for the monitoring project. It first listen to the RS485 network and if there is no backup master (slave) this daemon will take the hand!

1. ssh to the FoxG20 box and login (root/netusg20)
2. update the debian source-list with your favorite debian package mirror

       vi /etc/apt/source.list

3. keep the server on time to avoid time stamp error

       aptitude update && aptitude install ntpdate && ntpdate ntp.metas.ch

4. update the installation

       aptitude update && aptitude safe-upgrade

5. Install packages

       aptitude update && aptitude install automake make libtool flex byacc bison g++ libldap2-dev texinfo

6. Compile and install libconfig

       ./configure && make && make install

   • If you get libtool: Version mismatch error.

           This is libtool 2.2.6, but the
           libtool: definition of this LT_INIT comes from libtool 2.2.6b.
           libtool: You should recreate aclocal.m4 with macros from libtool 2.2.6
           libtool: and run autoconf again.

   • do:

           autoreconf --force --install

7. Reload libraries

       ldconfig

   • or

         /usr/bin/ldconfig -l /usr/local/lib/libconfig.so.9

8. Configure compile and install acdsn
   • Modify Makefile.am with options: (-DACCESS or -DCONTROL or -DDRIVE)

         autoreconf -fvi
         ./configure && make

   • copy binary in /usr/bin/acdsn (make install not yet implemented)
   • copy init file in /etc/init.d/acdsn and run update-rc.d acdsn
9. configure files in /etc/acdsn (especially /dev/ttyS?)
10. modify the /etc/default/tmpfs file to mount heavy files/directories into memory
11. add the tmpfs init script into /etc/init.d¹⁾²⁾³⁾ and

        chmod +x tmpfs
        update-rc.d tmpfs defaults 10
        //OR
        insserv tmpfs
     

12. modify the /etc/network/interfaces to allow hotplug

If you want to make an automatic reverse ssh tunnel, you can add:

1. install expect package to create a remote ssh tunnel

       aptitude install expect

2. create a certificat

       ssh-keygen -t rsa

3. export the public key on the remote host

       cat id-rsa.pub >> authorized_keys

4. configure root bashrc

       export EDITOR=vi

5. add reverse ssh tunnel connection in crontab

       */5 * * * * /bin/bash /media/data/connect.sh -u sbolay -t bolay.co -e /media/data/.add-rsa -l 1091 -r 9031
       */5 * * * * /bin/bash /media/data/connect.sh -u sbolay -t bolay.co -e /media/data/.add-rsa -l 22 -r 9023

⇒ It is to hard for the kernel

aptitude purge apt-xapian-index

http://linux.koolsolutions.com/2009/05/07/how-small-can-you-make-your-linux-system-part-1/

From man page:
monit is a utility for managing and monitoring processes, files, directories and filesystems on a Unix system.
Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.

aptitude install monit

Add configuration in /etc/monit/conf.d/acdsn

check process acdsn with pidfile /var/run/acdsn.pid
start program = "/etc/init.d/acdsn start" with timeout 60 seconds
stop program  = "/etc/init.d/acdsn stop"

• Monitor and restart Apache or lighttpd webserver when daemon is killed
• You my be interested also to the respawn option of the inittab. (See this post)