IT Blog - Page 43 of 153 - Vyacheslav Gapon - personal blog, manuals, articles, notes, development

How to change user login in WordPress

To change the WordPress user login, you need to execute an SQL query to the database, since this cannot be done through the admin panel menu.

How to Prevent WordPress Theme Updates

Once upon a time a free theme was activated on one site and a lot of changes were made in it, so that someone would not accidentally update it and not overwrite the changes, I did the following:

How to allow all outgoing ports in CSF

Once on the same server running cPanel, CSF (Config Server Firewall) and LFD (Login Failure Daemon) I wanted to run the Speedtest CLI, but it did not start because it could not connect to the servers, I opened the CSF settings through the WHM panel (at the very bottom menu “ConfigServer Security & Firewall” – “Firewall Configuration”), where he discovered that only a few outgoing ports were open:

Installing and using Speedtest CLI

In this article, I will give an example of installing and running the Speedtest CLI.

Solution for Speedtest CLI error “Failed to find a working test server”

Once, when running the Speedtest CLI on one Linux server, I noticed the following error:

List and description of existing Wi-Fi frequencies, standards

In this article I will provide a list and description of existing Wi-Fi frequencies, standards.

Automatic switching between backup channels on MikroTik (RouterOS)

Suppose there are two Internet channels, from different or one provider, the gateway can be the same, it does not matter. They are connected to the first and second ports.

Nginx. Parameter default_server

The default_server parameter defines the default server to which a client request will be sent in which the host field is empty or an unknown domain is specified in it. For example, when a client opens the server IP address in a browser, or when the server has several domains, for example, ixnfo.com, test1.ixnfo.com, test2.ixnfo.com, but not all domains are specified in the ngixn configuration.

Installing Memcached

Let me give you an example of installing Memcached, which allows you to cache data in RAM.

ABillS. How to run periodic on January 2

Once, one Internet provider asked me that ABillS should not charge the subscription on New Year’s Eve, so that users who forgot to replenish their account do not disconnect at midnight.