Can't access to amazon ec2 instance

Question

I can't access to amazon ec2 instance using ssh terminal:

ssh -i new.pem ubuntu@<public-ip>

It says connection closed by <public ip>

and FileZilla stopped working and I am getting this error:

Error: Server unexpectedly closed network connection
Error: Could not connect to server

This all happened after I changed the server's /etc folder's permissions to 775 to update the php.ini file.

What happened?

Answer 1

Sounds like your instance may be hosed following the permission changes.

Take a look at this question: https://serverfault.com/questions/364677/why-is-chmod-r-777-destructive which describes a similar situation.

And a look at this potential resolution: https://serverfault.com/questions/234061/re-gaining-root-access-to-an-ec2-ebs-boot-image

Never had this happen to me so not personally used the recovery technique.

Good luck!