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how to change swap space on ubuntu

# Disable Swap
sudo swapoff /swapfile
# Edit Swapfile to desired size, 2G, 4G etc
sudo fallocate -l 2G /swapfile
# Enable Swap again
sudo swapon /swapfile
# You can check your new swap with
sudo swapon --show

how to swap ubuntu

# Check Current Swap
sudo swapon -s

# Create Swap File
sudo fallocate -l 4G /swapfile
chmod 600 /swapfile

# Make it to swap format and activate on your system
sudo mkswap /swapfile
sudo swapon /swapfile

# Make Swap Permanent
sudo vim /etc/fstab
# and add below entry to end of file
/swapfile   none    swap    sw    0   0

# Check System Swap Memory
sudo swapon -s
free -m

# Update Swappiness Parameter
sudo vim /etc/sysctl.conf
# append following configuration to end of file
vm.swappiness=10

# Now reload the sysctl configuration file
sudo sysctl -p

create swapfile ubuntu

sudo swapon --show

create swapfile ubuntu

sudo dd if=/dev/zero of=/swapfile bs=1024 count=1048576

create swapfile ubuntu

sudo swapon /swapfile

create swapfile ubuntu

sudo fallocate -l 1G /swapfile

create swapfile ubuntu

sudo nano /etc/fstab

create swapfile ubuntu

/swapfile swap swap defaults 0 0

create swapfile ubuntu

sudo mkswap /swapfile

swap memory in ubuntu

sudo fallocate -l 2G /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
output 
Setting up swapspace version 1, size = 2 GiB (2147479552 bytes)
no label, UUID=fde7d2c8-06ea-400a-9027-fd731d8ab4c8
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increase swap size ubuntu

https://docs.rackspace.com/support/how-to/create-remove-swap-file-in-ubuntu/

//changes on this line only
sudo dd if=/dev/zero of=/swapfile bs=1M count=1024 oflag=append conv=notrunc
The above command will append 1GiB of zero bytes at the end of your swap file.

create swapfile ubuntu

sudo chmod 600 /swapfile

swap memory in ubuntu

sudo fallocate -l 2G /swapfile
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ubuntu edit swap m

edit swap size ubuntu