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Pre-release workflow

With conventional commit

lerna publish --conventional-prerelease will publish a pre-release

lerna publish --conventional-graduate will move from pre-release to release

Resources

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SSL

Check an SSL certificate

See when it expires: openssl x509 -enddate -noout -in file.pem

Let's Encrypt

Let's Encrypt - Setup / Apache

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Statis website in 5 minutes

1. install a digital ocean machine
2. ssh root@...
3. install nginx - sudo apt-get update && sudo apt-get install nginx
4. use /var/www/html to host your static files

If you need to configure the hosting folder

1. create the hosting folder - sudo mkdir /srv/www /srv/www/

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get "creation date" of a file

# get inode 
stat PATH_TO_FILE

# get "crtime" (with acute brackets <...>)
debugfs -R "stat <INODE>" /dev/md5 | grep crtime

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Action	Command
open file directly at the end of file	less +G file
move cursor to the end of file	shift + G
keep colors in the log	less -r file

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Syntax:

ssh -L localport:host:hostport user@ssh_server -N 

where:

• -L - port forwarding parameters (see below)
• localport - local port (chose a port that is not in use by other service)
• host - server that has the port (hostport) that you want to forward
• hostport - remote port

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fail2ban

Manual

Ban after a certain number of login attempts failed.

Some settings:

• bantime
• number of failed logins
• etc.

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find srch_dir -cmin -60 # change time

find srch_dir -mmin -60 # modification time

find srch_dir -amin -60 # access time

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# Minute   Hour   Day of Month       Month          Day of Week        Command    
# (0-59)  (0-23)     (1-31)    (1-12 or Jan-Dec)  (0-6 or Sun-Sat)                
    0        2          12             *                *            /usr/bin/find

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class MyPredictionResource:
    def on_get(self, req, resp):
        """Handles GET requests"""
        resp.body= json.dumps({"prediction": "you will sell €400"})

api = falcon.API()
api.add_route('/my-prediction', MyPredictionResource())

# run with `gunicorn --workers 4 server:api ./file.py`