One possible cause is thatthe path to the XLCM has not been included in the operating system PATH variable. XLCM is located in$XILINX/../common/bin/lin and$XILINX/../common/bin/lin64 directories.
Therefore, set either one of the following PATH variables depending on your Linux platform:
Here, XILINX is the variable that refers to the path where the ISE software is installed, for example, /tools/xilinx/13.2/ISE_DS/ISE.
Setting this location in the PATH should be done automatically when runningthe appropriate settings64.sh,settings64.csh,settings32.sh, orsettings32.csh in the XILINX installation directory.
After the path is set up correctly, you can open it from the Project Navigator GUI or from command line with the command "xlcm".