Debian Swap File

1. Allocate file

$ sudo fallocate -l 1G /swapfile

$ sudo chmod 600 /swapfile

2. Format file as swap filesystem

$ sudo mkswap /swapfile

3. Activate swap

$ sudo swapon /swapfile

4. Check results

$ swapon --show

5. Make swap persistent

Make backup:

$ sudo cp /etc/fstab /etc/fstab.back

Add line to /etc/fstab:

/swapfile none swap sw 0 0

See also

https://losst.pro/fajl-podkachki-linux?ysclid=l93shkkir5228223099