Hi guys! I tried to install minecraft and just run this command:

java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui

But I got this error:

OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000caf50000, 715849728, 0) failed; error='Cannot allocate memory' (errno=12)
#
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (malloc) failed to allocate 715849728 bytes for committing reserved memory.
# An error report file with more information is saved as:
# /root/minecraft/hs_err_pid6462.log

I followed this tutorial:
https://www.digitalocean.com/community/tutorials/how-to-set-up-a-minecraft-server-on-linux

Can anybody help me?