How to make a swap file on a any Cloud linux machine & lvm swap 

How to make a swap file on an any_Cloud Linux machine.
#LVM_SWAP
#LVM
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free -m
touch swapfile
ls
chmod 600 swapfile
dd if=/dev/zero of=swapfile bs=1024k count=1024
echo "/root/swapfile swap swap defaults 0 0" -- /etc/fstab
free -h
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