Do not install nodejs through apt-get, which will need sudo rights and appium will not work if node is installed as sudo user. If you have already installed remove it using
sudo apt-get remove nodejs
sudo apt-get remove npm
Download latest nodejs linux binaries form http://nodejs.org/download/
Extract into a folder that doesn't need sudo rights to access, for example your home folder.
tar -xvf <downloaded_binary_tar.gz>
Add the following line to your ~/.bashrc file.
export PATH=$PATH:<full_path_of_the_extracted_node_folder>/bin
Open a now terminal and do
npm install -g appium
appium
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