(98)Address already in use: make_sock: could not bind to address 0.0.0.0:443
When starting the httpd service, the following error message appears and the service failed to start.
Setting mail header for a foreign language
In our interconnected world, effective communication extends beyond borders and languages. When it comes to email communication, it's essential to cater to diverse audiences, including those who communicate in foreign languages. On...]
Oracle Import and Export: how to use it?
The Oracle export (exp) and import (imp) utilities are used to perform logical database backup and recovery, which allow you to write data into an operating system file and read it back into the Oracle database. They are also used ...]
SSL Certificate File Formats
Secure Sockets Layer (SSL) provides secure connections by allowing two applications connecting over a network connection to authenticate the other's identity and by encrypting the data exchanged between the applications. A server i...]
TCP Sweep: What is causing it?
Running a company as a reseller web host, you'll often receive an email from your upstream provider reporting security violations. If you do not correct the problem promptly, your upstream provider may block inbound and outbound tr...]
How do I extract information from an SSL key and certificate?
An SSL certificate contains the information about issuer, valid dates, subject, and other cryptic information. The openssl x509 subcommand can be used to retrieve that information from an SSL certificate.
My serial printer doesn't work. What shall I do?
The choice between a serial printer, parallel printer, or USB printer depends on various factors such as the specific requirements of the application, the type of data to be printed, and the available technology. Here are some cons...]
Apache mod_vhost_alias module fails to set DOCUMENT_ROOT
Mass virtual hosting using mod_vhost_alias or mod_rewrite module simplifies pattern-based virtual hosting. However, there is a major problem if your virtual host application makes use of the DOCUMENT_ROOT environment variable. Acc...]
How to create a htpasswd file with encrypted password?
htpasswd is used to create and update the flat files used to store usernames and passwords for basic authentication of HTTP users. Resources available from the Apache HTTP server can be restricted to just the users listed in the fi...]
Freevps installation on CentOS 4.1
FreeVPS is a software package used to set up Virtual Private Servers (VPS) on Linux systems. A VPS is a virtualized server that acts as a dedicated server within a larger physical server. This guide explains how to install FreeVPS ...]