Permission denied errors after installing AWS CLI on Linux

After seeming to succeed in installing the AWS CLI per this page I am getting permission denied errors for basic tests while logged in as root on CentOS release 6.6 running python 2.6.6.

root@hostname [~]# ./awscli-bundle/install -b ~/bin/aws
Running cmd: /usr/bin/python virtualenv.py --python /usr/bin/python /root/.local/lib/aws
Running cmd: /root/.local/lib/aws/bin/pip install --no-index --find-links file:///root/awscli-bundle/packages awscli-1.10.58.tar.gz
You can now run: /root/bin/aws --version
root@hostname [~]# /root/bin/aws --version
-bash: /root/bin/aws: Permission denied
root@hostname [~]# aws help
-bash: /root/bin/aws: Permission denied

Update

 ls -lZ /root/bin/aws
lrwxrwxrwx root root ?                                /root/bin/aws -> /root/.local/lib/aws/bin/aws

I am a developer with very modest sysadmin knowledge and I don't know my next step. I wish to be able to automate the storage of website backup tarballs to my S3 buckets from this server. How do I resolve the permission issues?

UPDATE 2
Per suggestion in comments I managed to enable the EPEL repository and install pip following which I appear to have installed aws as before without error BUT I still get permision denied

root@hostname [~]# yum install epel-release
[succeeded]
root@hostname [~]# sudo yum install python-pip
[succeeded]
root@hostname [~]# /usr/bin/pip --version
pip 7.1.0 from /usr/lib/python2.6/site-packages (python 2.6)
root@hostname [~]# sudo pip install awscli
[100+ of lines of output]
Successfully installed awscli-1.10.59 botocore-1.4.49 colorama-0.3.7 docutils-0.      12 futures-3.0.5 jmespath-0.9.0 ordereddict-1.1 pyasn1-0.1.9 python-dateutil-2.5      .3 rsa-3.4.2 s3transfer-0.1.2 simplejson-3.3.0 six-1.10.0
root@hostname [~]# which aws
/usr/bin/aws
root@hostname [~]# /usr/bin/aws --version
-bash: /usr/bin/aws: Permission denied
root@hostname [~]# /usr/bin/aws help
-bash: /usr/bin/aws: Permission denied
root@hostname [~]# aws --version
-bash: /usr/bin/aws: Permission denied
root@hostname [~]# aws help
-bash: /usr/bin/aws: Permission denied

root@hostname [~]# ls -lZ /usr/bin/aws
-rw-r--r-- root root ?                                /usr/bin/aws
ls -lZ /usr/bin/ > ~/ls.txt
excerpt from ls.txt:
    -rwxr-xr-x  root root    ?                                auvirt*
    lrwxrwxrwx  root root    ?                                awk -> ../../bin/gawk*
    -rw-r--r--  root root    ?                                aws
    -rw-r--r--  root root    ?                                aws_bash_completer
    -rw-r--r--  root root    ?                                aws.cmd
    -rw-r--r--  root root    ?                                aws_completer
    -rw-r--r--  root root    ?                                aws_zsh_completer.sh
    -rwxr-xr-x  root root    ?                                b43-fwcutter*
    -rwxr-xr-x  root root    ?                                base64*