ProCKSI

= System Updates =

The operating system of the master node and each slave node must be configured to be updated automatically with security relevant patches. 

 * Modify ''/etc/yum.conf'' in order to allow connections through the proxy server:

  {{{

  #The proxy server – proxy server:port

  proxy=http://wwwcache.cs.nott.ac.uk:3128

  }}}

 * Modify ''/etc/yum.repos.d/CenOS-Base.repo'' in order to allow a local mirror to be used for the updates:

  {{{

  baseurl=http://earth.cs.nott.ac.uk/ …

  }}}

 * For automatic nightly, install the ''yum-cron'' package. Enter at the command line of the master node and each slave node:

  {{{

  yum  install  yum-cron

  }}}

 * Make the ''yum'' daemon start at boot time. Enter at the command line of the master node and each slave node:

  {{{

  chkconfig  --add  yum 

  chkconfig  yum  on

  }}}

 * Start the ''yum'' daemon. Enter at the command line of the master node and each slave node:

  {{{

  /sbin/service  yum  start

  }}}

Note that ''yum-updatesd'' is the new daemon for nightly updates. 

 * Disable ''yum-updatesd'' to start up at boot time. Enter at the command line of the master node and each slave node:

  {{{

  chkconfig  yum-updatesd  off

  }}}

 * Stop the ''yum-updatesd'' daemon. Enter at the command line of the master node and each slave node:

  {{{

  /sbin/service  yum-updatesd  stop

  }}}