Update documentation for RHEL7

[ericfranz]

1. update https://osc.github.io/ood-documentation/installation/modify-system-security.html?highlight=iptables to include firewalld
2. ???

[brianmcmichael]

First Installation on RHEL7 is done. @nickjer is talking to systems presently about some issues with passenger processes being unexpectedly killed. It may be an SSL thing. Install notes to follow.

[brianmcmichael]

1. Software Requirements

For RHEL 7, the subscription manager command is:

sudo subscription-manager repos --enable=rhel-server-rhscl-7-rpms

I experienced some artifacts in Chrome while triple-clicking the Sphinx documentation. @nickjer was able to replicate in Chrome linux. This does not appear in Firefox.

Whenever a <pre> is at the bottom of the page, triple-clicking the line copies the Labels from the navigation buttons.

mkdir -p ~/ood/src
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2. Modify System Security

Use sudo /usr/sbin/service iptables save instead of sudo /etc/init.d/iptables save

This may not be an issue if we use firewalld instead.

9. Install Applications

cd ~/ood/src/sys

This dir does not exist. Need a mkdir command before this.

9.6 My Jobs

Need to add the git19 scl to the bundle install command since it uses ood-job from github.

Should be:

scl enable rh-ruby22 git19 -- bin/bundle install --path vendor/bundle

Unless we move ood-job to rubygems.

Also got the Sphinx issue on that page:

sudo cp -r . /var/www/ood/apps/sys/myjobs
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[nickjer]

Added the sudo subscription-manager ...
Fixed 9
Fixed 9.6

Ignoring the Sphinx/Chrome issue for now.
Will request firewalld.