Category Archives: Virtualization

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How to use a PS1 in Linux/MAC

Here are the PS1‘s I use for my daily driver. Feel free to take them and change them up.

I use different colors, so one doesn’t accidentally login or run something as root (which is in red, users are yellow).

To use these, simply copy and paste them into either the root user; or regular user’s .bashrc.

Alternatively you can add them to /etc/profile to make them enforced system wide.

For MAC, it is the same; however the PS1 is a little different. See below.

Root

User

Don’t forget! Linux Learning Resources

This is kept under the Linux Learning Project and Learning Resources section of the site, and is updated occasionally with new links. Feel free to suggest one by contacting me directly.

LEARNING RESOURCES

Help/Chat:

MattCurry.com Video Chat
- Quick Client
- Video/Voice Chat
- Share Desktop
  - No Install Needed
- Works on Phones
Linux Learning Slack Channel
- Use to Request an invite
- All are welcome

Resources:

Documentation:
- Evernote:
  - If you don’t already have this, I am a big supporter of evernote.
  - It can help create your own personal knowledge base (aka K.B.)
  - It can make learning much quicker and easier.
  - I and many students share notebooks
Linux:
- LinuxJourney.com
  - Free Linux Course
  - Short and to the Point
Git / Revision Control
- GIT / GITHub Learning Resources (aka Revision Control)
  - GitHub YouTube Channel
BASH
- commandlinefu.com
  - Great Place to learn great BASH tricks or how to do something more efficiently.
General How-To Articles:
- stackexchange.com
  - Great for asking questions; or just seeing what has already been asked.
- jupiterbroadcasting.com
  - Podcasting site ran by great guys.
    - Been following since 2004-ish
  - Several Good shows for Linux
    - TechSNAP
      - Systems Network and Administration Podcast
    - Linux Action Show
      - One of the classics
Networking:
- PortForward.com
  - Shows you how to open a port through your router.
    - Very handy skill to have, and makes it easy to help with issues.

I must say, like a lot of people I love the idea of a free SSL Certificate. So I thought this would be great for my site. So I downloaded the LetsEncrypt package on to an Ubuntu 15.10 box. The server was running Apache2, and was pretty much stock. When I applied the cert to the site, it was super easy. I was very impressed with the ‘–apache’ option. I then updated my URLs in WordPress to HTTPS. That’s it I was up and running in a few min. I was pretty happy at this point.

Then, I realized it broke all of the other services I had on the machine that were public facing. I had several. Even ones with their own certs were breaking. So I decided to remove it…. After removing it from Apache completely I noticed an issue. All of my users that had been to the site; were getting redirected still. Somehow it is keeping the redirct with the cert/data that is installed when the cert is installed from visiting the site.

Long story short, I had many people that thought my site was down. I even moved servers; and it still happened. I tried clearing browser cache, DNS Cache on my MAC, from another IP. Finally after a reinstall (probably not needed, but quicker); I was able to actually load my site without the redirect. I am sure there is something here I am not seeing; but to be honest I didn’t feel like spending all my time dealing with browser settings.

If anyone would like to let me know how they get around this I would like to know.

I hope this helps those who are thinking of trying out LetsEncrypt. I am not saying its a bad product; or idea. I love the install and the idea of it. However, the practical implementation is not there yet. For those reading this keep in mind that it is still in Beta as of this article. So this might eventually go away.

P.S. – To those on the LetsEncrypt project, I appreciate all the work; and I hope you take this criticism positively. A good uninstall path is needed before I think this will go mainstream on monolithic boxes. Maybe its ok with a 12 factor applications.

Sincerely,

Matthew Curry