Often in individual node in a Rocks cluster, auto-reinstallation could happen accidentally. If that happens, very likely some very essential application originally intalled in that node are gone. This include primararily:

1. VirtualBox
2. Firefox
3. chromium

If all of these are absent in a freshely reinstalled node, either install all of these one by one, or run an 3-in-1 script to reinstall all these four. 

Each of the individual application can be installed in an individual node by issuing the relevant scripts below:

1. sh /share/apps/configrepo/ins_virtualbox 
2. sh /share/apps/configrepo/ins_firefox
5. sh /share/apps/configrepo/inst_chromium

To install all of these applications in a node in a single script, issue

sh /share/apps/configrepo/afternodereinstall

You can also issue afternodereinstall for all nodes in one single shot by issuing the script
rocks run host "sh /share/apps/configrepo/afternodereinstall"

This will reinstall all these applications in all nodes. One must standby in front of the screen if doing so.

For comsics cluster which is installed in Acer Veriton PC, we need to re-install also the ati display driver in case of accidental node reinstallation. This has to be done manually by issuing 

	sh /share/apps/inst_ati

in each node as root.

Mathematica could also lost in the case of accidental node reinstallation. We need to individually install mathematica in each node by manually issuing (and standy to perform manual key-in) as root 

	sh /share/apps/configrepo/mathematica1.conf