Installing Hotfixes on Lotus Domino Server in Unix environment

Use secureCRT/ telnet to login to unix Host
Switch to the id by sudo su - <name> that is the credential which is required to start / stop the lotus domino server

Check Disk Space before proceeding with installation
cd /home/<server name>/lotus/notes/latest/ibmpow/    (the path where domino binaries reside)
du -k
df -k
If space is enough then shutdown the Lotus Domino server.

The installation requires sudo root privilege, so use the command su - root  to execute the install script or Sudo su –

To set the environment variables type at Unix prompt
export NUI_NOCHECKSUM=1
export NUI_NOTESDIR=/home/<server name>/lotus     

First unInstall the existing HotFix if present
cd  /<software of existing hotfix>
./install

Install the required Domino Hotfix 
cd  /<software of new required hotfix>
./install

Please be sure to login as the appropriate Unix user before running Domino 
Do not run the Lotus Domino server as root.