Create, Resize, or Extend a Linux Swap File

swapfile.md

# check memory
$ free

# check swap file location, (default location - '/')
$ swapon

# turn off swap using swapfile location
$ sudo swapoff /swapfile

# remove swapfile
$ sudo rm swapfile

# create swapfile (zero, location, block size, count, status)
$ sudo dd if=/dev/zero of=/swapfile bs=1M count=4096 status=progress

# permission
$ sudo chmod 600 /swapfile

# formating
sudo mkswap /swapfile

# enable swapfile
$ sudo swapon /swapfile