Using SSH, Redirection, and Permissions in Linux

NOTE: Please wait an **extra 5 minutes **before logging into the instances to make sure they are finished being set up.

We need to use SSH keys to satisfy this requirement, so generate them with this:

[dev@server1]$ ssh-keygen

Then run:

[dev@server1]$ ssh-copy-id <server2 IP>

We need to use a method of copying files over a network. scp is the best tool, like this:

[dev@server1]$ scp *.gz <server2 IP>:~/

Then connect to server2 using ssh:

[dev@server1]$ ssh <server2_IP>

Then we can extract the files:

[dev@server2]$ tar -xvf deploy_content.tar.gz >> tar-output.log

[dev@server2]$ tar -xvf deploy_script.tar.gz >> tar-output.log

Make sure to use >>, so that the output is appended rather than overwritten.

The task is asking to make new files with the following permission: 0600.

So we can do subtraction to figure out what our umask should be.

0666 <-- Default

0600 <-- Desired

----

0066 <-- What we need to set

So we run:

[dev@server2]$ umask 0066

First, we check permissions on deploy.sh:

[dev@server2]$ ls -l deploy.sh

There's no execute bit. Let's add one:

[dev@server2]$ chmod +x deploy.sh

And then run it:

[dev@server2]$ ./deploy.sh