The update-alternatives Linux command can be used to update the default version of GCC.

Example: Use GCC 7

sudo update-alternatives --set gcc /usr/bin/gcc-7

Example: Use GCC 8

sudo update-alternatives --set gcc /usr/bin/gcc-8

Example: Use GCC 9

sudo update-alternatives --set gcc /usr/bin/gcc-9

Example: Use GCC 10

sudo update-alternatives --set gcc /usr/bin/gcc-10

Example: Use GCC 11

sudo update-alternatives --set gcc /usr/bin/gcc-11

Persist version forever

If you want to set GCC version forever, please use the following command to update your .profile file:

echo "sudo update-alternatives --set gcc /usr/bin/gcc-11" >> ~/.profile

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