Screen is a terminal management tool for Linux and widely used in system administrators. If you have only terminal in your hand, connected to your server with SSH and don't know how to split , it is the best tool ever.
The main pros are you can not only leave the session open if you are dropped out or kicked out by the remote server. You can continue your remote session by typing a simple command and continue your work.
Clear git cache is necessary when your git push is not appear over the server, especially .gitignore addition or removal.
Install drupal on subdirectory with laravel and nginx- how to
Update kernel Amazon EC2 is not the easy way and sometimes leads to worse your instance by not connecting to your system. I have faced and as fast as I can, I have shared the problem with you. I work with gentoo.
DISCLAIMER: DO AT YOUR OWN RISK.
This process has been described in EC2 Official Page: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/UserProvidedKernels.html
A swap is a kind of virtual memory storage where the rarely used pages of memory are stored. Swap storage becomes valuable if low memory or fast opcache PHP. Make swap file linux is required to faster your system.
Swap storage stored as a partition in a dedicated server but in virtual machines or some system, there is only one partition and no swap partition. Linux is making easy swap as a file. So, swap space can be both file or partition. If you have swap partition but require more swap space on a specific case, you can change your swap to file.