deploy python app to linux

gistfile1.txt

Things to do:

Update Available Package Lists: 
# sudo apt-get update

Upgrade installed packages: 
# sudo apt-get upgrade 
Other Tasks: 
# sudo apt-get autoremove 

Discover Packages: https://packages.ubuntu.com 

Add User: sudo adduser <name>
Giving sudo access to user: 
/etc/sudoers.d contains a file for each account allowd.
copy existing /etc/sudoers.d//vagrant to <name> and change existing name to <name>
Do not just copy /etc/sudoers to /etc/sudoers.d/<name>, as this will break sudo.

On any system:
Generate key pairs
# ssh-keygen
Save to file, which will create a private and public key, key pair.  For example if you save the pair to a file such as ~/.ssh/linuxclass

On the remote system.  Login as the non-admin user such as <student>
Install public key
# cd ~
# mkdir .ssh
# touch .ssh/authorized_keys
# vi .ssh/authorized_keys
paste the linuxclass.pub into the authorized_keys as one line, then save the file.
# chmod 700 .ssh
# chmod 644 .ssh/authorized_keys

On local system:
# ssh -p 2222 <student>@localhost -i ~/.ssh/linuxclass

Disable password logins:
# sudo vi /etc/ssh/sshd_config
Find the line similar to:
PasswordAuthentication yes
-- change it to --
PasswordAuthentication no

Change sudo for a user, so they don't need a password:
reference: https://phpraxis.wordpress.com/2016/09/27/enable-sudo-without-password-in-ubuntudebian/
edit /etc/sudoers.d/<name>
change line for this user to:
user     ALL=(ALL) NOPASSWD:ALL

***
Deploy Flask app to Apache:
https://www.bogotobogo.com/python/Flask/Python_Flask_HelloWorld_App_with_Apache_WSGI_Ubuntu14.php
***

Edit /etc/apache2/envvars 
Add line:
export APP_DIR=/home/..../path2app/




Apache Config information: https://stackoverflow.com/a/49807673
`
<VirtualHost *:80>
  ServerName MY_SERVER_NAME

  WSGIDaemonProcess appname threads=5 home=${APP_DIR}
  WSGIScriptAlias / "${APP_DIR}your_app.wsgi"

  <Directory "${APP_DIR}">
    Options Indexes FollowSymLinks MultiViews ExecCGI
    AllowOverride None
    Require all granted
    WSGIProcessGroup appname
    WSGIApplicationGroup %{GLOBAL}
  </Directory>
</VirtualHost>
`