History

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
```