I have installed gcc-12 and g -12 on my Ubuntu 22.04 system.

How do I make them the default versions used when I call gcc/g in terminal?

CodePudding user response：

First you need to remove the current gcc and g symbolic links:

sudo rm /usr/bin/gcc
sudo rm /usr/bin/g  

Then, create a new symbolic link for gcc and g version 12:

sudo ln -s /usr/bin/gcc-12 /usr/bin/gcc
sudo ln -s /usr/bin/g  -12 /usr/bin/g  

To make sure that everything has worked fine check the gcc and g version:

gcc --version
g   --version

You should get 12.1.0