Change folder read / write access on Ubuntu Linux

Question

I want to create a folder and write the file to the created folder in the Amazon EBS volume from the Java Servlet installed on Amazon EC2 running Ubuntu.

I set the volume of EBS to

 /mnt/my-address 

But the servlet cannot create a folder and write a file?

My question

Why can't Java sevlet create a folder on an installed Amazon EBS volume?

Answer 1

It looks like your folder does not have the correct read and write permissions.

Try to provide read and write access to all users in the appropriate directory, for example:

 sudo chmod -R ugo+rw /mnt/my-address 

If it’s not convenient for you to grant write permissions to everyone, you can fine tune permissions by playing with property rights and groups, but I need more information about your setup to help you with this.

Edit : if only the ec2 user is the only one who needs access, you can change the ownership of the directory for this user, and then grant access only to him:

 sudo chown -R ec2-user:ec2-user /mnt/my-address sudo chmod -R u+rw,go-rw /mnt/my-address