You will need to setup your PATH environment variable in linux to allow the OS to find the msp430-gcc compiler and associated tools. The way that you set PATH is dependent on the type of shell that you are using.

• Determine your unix shell type with the command echo $SHELL.
• bash
  • Open or create .bashrc in your home directory.
  • Add the following line to the file: export PATH=$PATH:/l/arm/gnuarm/bin
• csh
  • Open or create .cshrc in your home directory.
  • Add the following line to the file: setenv PATH {$PATH}:/l/arm/gnuarm/bin
• tcsh
  • Open or create .tcshrc in your home directory.
  • Add the following line to the file: setenv PATH {$PATH}:/l/arm/gnuarm/bin

To confirm that the new path is correct you can use echo $PATH to view the new path. To get the new path to take effect you will need to either run source with the modified file as an argument or just restart the shell.