I have installed g++ and gcc from repository on ubuntu 12.04 ad you can see that they are indeed installed

mahmood@pc:~$ dpkg -l | grep gcc

ii  gcc-4.4                                4.4.7-1ubuntu2                          GNU C compiler

ii  gcc-4.4-base                           4.4.7-1ubuntu2                          GCC, the GNU Compiler Collection (base package)

ii  gcc-4.4-multilib                       4.4.7-1ubuntu2                          GNU C compiler (multilib files)

ii  gcc-4.6-base                           4.6.3-1ubuntu5                          GCC, the GNU Compiler Collection (base package)

ii  lib32gcc1                              1:4.6.3-1ubuntu5                        GCC support library (32 bit Version)

ii  libgcc1                                1:4.6.3-1ubuntu5                        GCC support library

ii  libgcc1-dbg                            1:4.6.3-1ubuntu5                        GCC support library (debug symbols)



mahmood@pc:~$ dpkg -l | grep g++

ii  g++-4.4                                4.4.7-1ubuntu2                          GNU C++ compiler

ii  g++-4.4-multilib                       4.4.7-1ubuntu2                          GNU C++ compiler (multilib files)

However when I run gcc or g++ commands, it says they are not installed

mahmood@pc:~$ g++

The program 'g++' can be found in the following packages:

 * g++

 * pentium-builder

Try: sudo apt-get install <selected package>



mahmood@pc:~$ gcc

The program 'gcc' can be found in the following packages:

 * gcc

 * pentium-builder

Try: sudo apt-get install <selected package>

What did I miss??