MyBlueLinux.com

Certbot and Let’s Encrypt CA

What is Certbot, cerbots commands and user guide, what is Let's Encrypt Rate Limits. How works cerbot authenticators and installers, certbot commands exmaples

Linux Security Web Servers

How Change Timezone in debian distros

When you want change timezone in debian linux distors like debian or ubuntu, you can use one very simple command in your command line dpkg-reconfigure tzdata

Debian

How Reset root password in MySQL and MariaDB

If you assigned a root password in MySQL or MariaDB previously but have forgotten it, you can assign a new password. The following sections provide generic instructions for that apply to any system.

Databases Linux

How Scrape HTML Tabular data with Python

This short article will show you a tutorial on how to the easiest way to scrape the tabular data from any website with the three lines of Python Script!

Python Development

How To Save MySQL query output to file or export to CSV

Answers to a few questions about Mysql or MariaDB databases: How To Save MySQL/MariaDB query output to file or export to CSV? How to list MySQL database table column names without the table formatting? How to log the output from an entire MySQL client session?

Databases

OCSP Stapling on Nginx and Apache webserver

To understand OCSP stapling, it is necessary to understand OCSP, the Online Certificate Status Protocol. OCSP is a protocol for determining whether a certificate is revoked (for instance, becau se its private key was compromised). Every time a browser connects to an HTTPS website, it contacts the OCSP responder specified in the SSL certificate, and asks if the certificate is revoked. If the respond er replies that the certificate is revoked, the browser blocks the page from loading.

Web Servers Networking Security

phpmyadmin - how recovery error (HY000/1698): Access denied for user 'root'@'localhost'

When I try login as a root user to my mariadb (mysql) database in phpmyadmin on my linux debian stretch, I got this error message: mysqli_real_connect(): (HY000/1698): Access denied for user 'root'@'localhost'

Debian Linux Databases

ProFTPd Server with virtual users and in SFTP mode

How to configure proftpd server with virtual users and with sftp mode.

Debian Linux Networking Security

Python List or any Iterable Comprehension

Sometimes a programming design pattern becomes common enough to warrant its own special syntax. Python’s are a prime example of such a syntactic sugar. List comprehensions in Python are great, but mastering them can be tricky because they don’t solve a new problem: they just provide a new syntax to solve an existing problem. Let’s learn what list comprehensions are and how to identify when to use them.

Python Development

SED Tutorial - how print or delete particular line

How we can print or delete particular line with SED (text) stream editor

Linux Linux Utilities

Time zone and precise time setting in Linux

Properly set system time is important for the user, but also for the system itself. Let's explain how Linux accesses time zones and how to set the exact time to get you right.

Linux Debian

nftables geoip - continents ip

In the previous articles, we showed how to perform packet marking in nftables based on geoip source ip addresses and also how to log traffic to external files .
Today we will show how to mark packets based on which continent they come from.

The principle is that we first mark packets based on the source IP address so that we know which countries they are coming from. And then we'll find out which continent the state is on.

Linux Security Networking