If you installed DB2 Express-C, then please consult the DB2 Express-C forum for specific information on how to set up your machine for db2cc and other GUI programs. In Linux, you cannot simply start a GUI program from the command line without exporting the terminal, etc. Or, you could install the DB2 client on a remote windows machine and use db2cc from there (which is what most people do).
Originally Posted by year4e
M. A. Feldman
IBM Certified DBA on DB2 for Linux, UNIX, and Windows
IBM Certified DBA on DB2 for z/OS and OS/390