00 - IOT Tech - Linux Administration Center

00-toc.md

Toc

Tracker=> [](https://gist.github.com/ennisa-ire/993ef28062279a39df74204175a09185)

apt-get.md

Update Your System

sudo apt-get update

SW To Manage Repose

• sudo apt-get install software-properties-common -y

Adding PPAs

sudo add-apt-repository ppa:couchdb/stable -y

learning-style.md

Must not be boring!!! I repeat it must not be boring - this is not church!!!

This is Tony T, from IoT Tech its kinda dreamy Note, this is not a hip hop challenl is a learning platform!!!

I promised I would not be boring, i lied, here is boring fact of the day Philosy 101 :

• Thales the man who want to know what everything was made of!!! Ok
• Queue - Music little richie!!!!

Now onto the serious fun stuff.....

Lets learn together!!! I Start You go next

Demo Time!!!

Questions.

Remember learning is fun!!!

networking-hostsfile.md

Hosts File

127.0.0.1       localhost
127.0.1.1       ae-Unknow
127.0.1.1       skuli.com
10.0.3.45       service-accountinfo
10.0.3.152      artifact-db

The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

ssh-tunelling.md

Spin up a browser

ae@ae-Unknow:~$ ssh -XT ubuntu@artifact-db firefox
The authenticity of host 'artifact-db (10.0.3.152)' can't be established.
ECDSA key fingerprint is SHA256:ASTwtGDRrReK9kE0xmoXfdl1/tQyp5lO5U9r0dhJDkA.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'artifact-db,10.0.3.152' (ECDSA) to the list of known hosts.
ubuntu@artifact-db's password: 

X11 forwarding request failed on channel 0
Error: GDK_BACKEND does not match available displays
ae@ae-Unknow:~$ 

If you see this error you need to install xauth, on the server your are trying to visualize..

ubuntu@artifact-db:~$ sudo apt-get install xauth  

Tunnelling

Oh yeah, you want to secure your DB, or any port service from the public, then create a personal tunnel to it from your local machine lol

ae@ae-Unknow:~$ ssh -L5984:127.0.0.1:5984 ubuntu@artifact-db 
ubuntu@artifact-db's password: 
Welcome to Ubuntu 16.04.2 LTS (GNU/Linux 4.4.0-89-generic i686)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage
Last login: Sun Aug 27 09:20:43 2017
ubuntu@artifact-db:~$ 

How about to your best friends machine!!! Does your tunnel survive a reboot?

useful-commands.md

Search

Date

find . -mtime -1 -type f -exec grep -Iq . {} ; -and -print the "-1" ensures that everthing "modified" yesterday will be found.

Type

find . -type f -exec grep -Iq . {} ; -and -print
The "I" means binaries will be excluded, The "q" and the "." ensure the match is on text.