MPLAB® X Integrated Development Environment brings many changes to the PIC® microcontroller development tool chain. Unlike previous versions of MPLAB® which were developed completely in-house, MPLAB® X is based on the open source NetBeans IDE from Oracle. Taking this path has allowed us to add many frequently requested features very quickly and easily while also providing us with a much more extensible architecture to bring you even more new features in the future.
Download MPLAB from microchips website link is here : http://www.microchip.com/pagehandler/en-us/family/mplabx/#downloads
Before installing MPLAB , should install java if java is not installed
to install java check : INSTALL JAVA
then follow the steps
1. open Linux Terminal
2. change the permisions of the files that downloaded by executing the commands
chmod 755 mplabc18.bin
chmod 755 mplabx-ide-beta60-linux-32-bit-installer.bin
chmod 755 picc-18-pro-linux.run
chmod 755 picc-pro-linux.run
3. enter the following command
sudo ./MPLABX-V1_30-linux-installer.run An installer will launch. Follow the prompts through. Nothing special here.