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Django Deployment to Ubuntu 18.04

In this guide I will go through all the steps to create a VPS, secure it and deploy a Django application. This is a summarized document from this digital ocean doc

Any commands with "$" at the beginning run on your local machine and any "#" run when logged into the server

Create A Digital Ocean Droplet

Use this link and get $10 free. Just select the $5 plan unless this a production app.

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CTRL + Z => stops (pauses) a job
CTRL + C => terminates a job
Ctrl + L => Clear Terminal

Ctrl + C => terminates a job

# you comment in cmd => write you comment in terminal
Ctrl + E => Go to End into Any Line
Alt + F => Moving Forward in word into text line 

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#install 
pip install django-wkhtmltopdf

#settins.py
BASE_DIR = os.path.dirname(os.path.dirname(__file__))
STATIC_ROOT = os.path.join(BASE_DIR, 'static')

#views.py
class PDFView(PDFTemplateView):
    model = Student

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# for odoo

sudo wget https://builds.wkhtmltopdf.org/0.12.1.3/wkhtmltox_0.12.1.3-1~bionic_amd64.deb
sudo dpkg -i wkhtmltox_0.12.1.3-1~bionic_amd64.deb
sudo apt-get install -f
sudo ln -s /usr/local/bin/wkhtmltopdf /usr/bin
sudo ln -s /usr/local/bin/wkhtmltoimage /usr/bin

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sudo systemctl daemon-reload

sudo systemctl start odoo12

sudo systemctl enable odoo12

systemctl status postgresql

systemctl restart postgresql

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PSQL

Magic words:

sudo -u postgres psql

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If I remember correctly the user postgres has no DB password set on Ubuntu by default. That means, that you can login to that account only by using the postgres OS user account.

Assuming, that you have root access on the box you can do:

sudo -u postgres psql
If that fails with a database "postgres" does not exists error, then you are most likely not on a Ubuntu or Debian server :-) In this case simply add template1 to the command:

sudo -u postgres psql template1
If any of those commands fail with an error psql: FATAL:  password authentication failed for user "postgres" then check the file /etc/postgresql/8.4/main/pg_hba.conf: There must be a line like this as the first non-comment line:

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class EmployeeManger:
    mydict={}

    def add_employee(self,employee:"employee"):
        try:
            new_pk=max(self.mydict.keys())+1
        except ValueError:
            new_pk=1

        self.mydict[new_pk]=employee

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import urllib.request


#six: 1-33 and 34-92
#seven: 91-165
#eight:165-248
#nine:245-297

#ten:297-385

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y=input()

print("%s" % (y, len(y), y[::-1]))