How to undo command in terminal?

StackProger

3/7/24, 4:50 PM

Command:

sudo apt install software-properties-common
    sudo add-apt-repository ppa:ubuntu-toolchain-r/test
    sudo apt-get update
    sudo apt install gcc-9 g++-9
    sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 90 --slave /usr/bin/g++ g++ /usr/bin/g++-9 --slave /usr/bin/gcov gcov /usr/bin/gcov-9

Now my gcc version is 9.5 (11 was before)

How i can delete these update-alternative and give back my gcc 11??

584

1 + 0

command-line

gcc

Score:1

Ubuntu

popey

3/7/24, 5:23 PM

As an alternative to manually removing packages and the PPA, there's a more automated way of doing it with ppa-purge. In your case you'd run:

sudo ppa-purge -o ubuntu-toolchain -p test

The following format also works

sudo ppa-purge ppa:ubuntu-toolchain-r/test

From the documentation:

ppa-purge will reset all packages from a PPA to the standard
versions released for your distribution.

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Elon Musk

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EN: How to undo command in terminal?

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