Hi Manish,
Not an answer to your specific question but maybe contributing to the root cause of your problem ....
It appears you are running your DevTest processes as root? For all the linux DevTest installations I have assisted with we always used a technical linux group and technical linux user to install and run the software. Hence we never had issues with log or other files created as root for which we had no rights to manipulate.
The only attention point is if you want to start the DevTest processes automatically at boot time - i.e. the /etc/init.d scripts. Because these scripts are executed by user root, so you cannot run the scripts straight from here but instead your init.d script can use the command "daemon -u <technicalUser> /<yourDevTestInstallDir>/bin/RegistryService"
Cheers,
Danny