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Answer : What web server are you using? I had a very similar issue with nginx and AWS load balancing. I added keepalive_timeout 75s; to the http block in my nginx config file and haven't see the issue since. Make sure you restart nginx after you add and save that line (on ubuntu sudo service nginx restart . On redhat stop nginx /path/to/nginx/executable -s stop then /path/to/nginx/executable to start up nginx) This fix was recommended by AWS on their help page AWS Load balancer troubleshooting First, what is the Idle Timeout for your ELB set to? You'll find it at the very bottom of the "Description" tab for your load balancer. You can read more about the idle timeout here in the ELB documentation. The default is 60 seconds. You should also consider setting or increasing Keep-alive in your web server. How you do that will depend on what web server you are using. Second, if you think it's due to the client being switched from one instance to the ot...

Answer : Amazon Linux AMI is a red hat based distro so things like the package installer or the tools for service manage are different, and another thing you need to consider is the way of bootstraping, amazon instances are more flexible to do some things in cloudformation in the ubuntu way the best form to do it is with cloudinit https://help.ubuntu.com/community/CloudInit, you need to consider the packages too are multiple packages that not are native supported by Amazon Linux.

Answer : To allow user ec2-user (Amazon AWS) write access to the public web directory (/var/www/html), enter this command via Putty or Terminal, as the root user sudo : chown -R ec2-user /var/www/html Make sure permissions on that entire folder were correct: chmod -R 755 /var/www/html Doc's: Setting up amazon ec2-instances Connect to Amazon EC2 file directory using Filezilla and SFTP (Video) Understanding and Using File Permissions if you are using centOs then use sudo chown -R centos:centos /var/www/html sudo chmod -R 755 /var/www/html For Ubuntu sudo chown -R ubuntu:ubuntu /var/www/html sudo chmod -R 755 /var/www/html For Amazon ami sudo chown -R ec2-user:ec2-user /var/www/html sudo chmod -R 755 /var/www/html In my case the /var/www/html in not a directory but a symbolic link to the /var/app/current, so you should change the real directoy ie /var/app/current: sudo chown -R ec2-user /var/app/current sudo chmod -R 755 /var/app/current I hope th...