How to uninstall vue-cli 2.x.x

[SOLUTION]

Here is how I solved it.

using which vue I saw where vue was installed.

christianjavan@rog:$ which vue
/usr/bin/vue

Then I deleted all vue files inside the installation folder

christianjavan@rog:/usr/bin$ sudo rm -rf vue
christianjavan@rog:/usr/bin$ sudo rm -rf vue-init
christianjavan@rog:/usr/bin$ sudo rm -rf vue-list

Then I did exactly what it says in this link.

christianjavan@rog:/$ mkdir ~/.npm-global
mkdir: cannot create directory ‘/home/christianjavan/.npm-global’: File exists
christianjavan@rog:/$ npm config set prefix '~/.npm-global'
christianjavan@rog:/$ export PATH=~/.npm-global/bin:$PATH
christianjavan@rog:/$ source ~/.profile

Then I tried to install the new vue cli

christianjavan@rog:/$ npm install -g @vue/cli

Then I did vue --version and finally got the 3.0.3 version installed

christianjavan@rog:/$ vue --version
3.0.3

NOTE: After trying to run vue -V again later, it did't found the vue command, so I exported the new vue directory to the PATH. When you run npm install -g @vue/cli the command gives you the new vue directory.

christianjavan@rog:~$ npm install -g @vue/cli
/home/christianjavan/.npm-global/bin/vue -> /home/christianjavan/.npm-global/lib/node_modules/@vue/cli/bin/vue.js

You add that directory to your PATH.

christianjavan@rog:~$ export PATH=$PATH:/home/christianjavan/.npm-global/bin

it looks like you're missing a flag to determine context; maybe try sudo npm uninstall -g vue-cli (or -S or -D as needed)

make use of this command: npm install -g @vue/cli --force