First of all, I would recommend that you update to a more recent version of LPCXpresso IDE (v8.2.2 was the last version) or preferably MCUXpresso IDE (http://www.nxp.com/mcuxpresso/ide) which has superseded LPCXpresso IDE.
Then read the Installation Guide which details various things to note when installing on Linux. For LPCXpresso IDE you can visit the Documentation tab of https://www.nxp.com/lpcxpresso/ , and for MCUXpresso IDE visit MCUXpresso IDE|NXP
In particular, note the flavours of Linux that we actually support.
If you need more assistance, please clarify what version of Linux you are using, which eval board, and what you do and what messages you actually see in the IDE.
Regards,
LPCXpresso Support
