Could not execute command 'lessc' in odoo-9

Could not execute command 'lessc' in odoo-9


If "Could not execute command 'lessc'" Error ocour while installing odoo-9 and the login page will not show clearly.
Then use this six command in terminal and run it one by one

1- sudo apt-get install nodejs

2- sudo apt-get install npm

3- sudo npm install -g less

4- sudo npm install -g less-plugin-clean-css

5- sudo ln -s /usr/local/bin/lessc /usr/bin/lessc

6- sudo ln -s /usr/bin/nodejs /usr/bin/node