Installing Multiple Versions of Node.js on Ubuntu Using NVM
Let's look at the nvm tool for ubuntu and its basic commands for switching between node versions.
To install skype for ubuntu - or
To run in many windows, in the console or with a link to the application (shortcut):

/usr/bin/skypeforlinux --datapath=/home/ USERNAME /.config/skypeforlinux.acc2 --secondary
username - your user
/home/ USERNAME /.config/skypeforlinux.acc2 - or a place to store a separate session.
Let's look at the nvm tool for ubuntu and its basic commands for switching between node versions.
Consider setting up swap if there is enough RAM available. The effect of the swappiness parameter on the aggressiveness of swap file usage.
Let's consider the possibility of changing the parameters of the configuration file (php.ini) on a hosting that does not have the ability to configure the Cron scheduler (cli) from the panel.
Configuring Apache for high volume Cookies. Let's analyze the error "Bad Request. Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit." and options to configure the server.
Let's try to cure the black screen when booting Ubuntu after installing proprietary nvidia-340 driver on Nvidia 630M laptop.