If you are using the EC2 Free Tier micro instance, but the 600MB of RAM becomes a problem.
I ran into this when trying to compile something within the free tier – not enough RAM, no compiled binary. Easy fix, though.

You can’t add more RAM, but you can get around the lack of a swap file (virtual memory), thus giving the machine more addressable memory.

sudo dd if=/dev/zero of=/swapfile1 bs=1024 count=524288

sudo mkswap /swapfile1

sudo chown root:root /swapfile1

sudo chmod 0600 /swapfile1

sudo swapon /swapfile1

Then add the following line to your fstab (/etc/fstab):

/swapfile1 swap swap defaults 0 0

Test this with free -m and you should have a 512MB swap file adding to your 600MB RAM.

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