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SquirrelMail - Webmail in PHP
This chapter provides introductions and tutorial on SquirrelMail Webmail. Topics include installing and configuring SquirrelMail on CentOS systems; accessing mail server on local network; accepting self-signed certificate; using secure IMAPS and SMTPS ports 993 and 465. 2023-06-14, ∼258🔥, 0💬

SquirrelMail Configuration on CentOS
This section provides a tutorial example on how to configure SquirrelMail on CentOS to integrate with localhost Postfix and Dovecot servers. 2023-05-27, ∼257🔥, 0💬

"du" - Display Disk Usage of Directories
This section provides a tutorial example on how to use 'du' command to display disk usage of any given directories on Linux systems. 2022-10-01, ∼256🔥, 0💬

First Java Program - Hello.java
This section provides a tutorial example on how to write, compile, and execute the first Java program, Hello.java, with OpenJDK. 2024-04-12, ∼255🔥, 0💬

Migrate Old Scripts to New PHP Release
This section provides a tutorial example on how to migrate old PHP scripts to PHP new releases. 2022-10-01, ∼254🔥, 0💬

Provide Self Signed Certificate to SquirrelMail
This section provides a tutorial example on how to provide download self-signed certificate from mail server and provide it SquirrelMail as a trusted certificate to resolve the invalid certificate error. 2023-05-27, ∼251🔥, 0💬

"split" and "cat" - Split and Join Files
This section provides a tutorial example on how to use 'split' command to split it into chunks and use 'cat' command to join chunks back into a single file. 2022-10-01, ∼251🔥, 0💬

"wget" - Get Files from the Web
This section provides a tutorial example on how to use 'wget' command to download files from the Web. 'wget' can resume failed downloads. 2023-05-23, ∼249🔥, 0💬

Apache Configuration for HTTPS Protocol
This section provides a tutorial example on how to install Web server certificates and configure Apache HTTP Server to support the HTTPS protocol. 2024-04-12, ∼248🔥, 0💬

Common Issues on Running Tomcat
This section provides some examples of issues on running Apache Tomcat on Linux systems. 2024-04-12, ∼247🔥, 0💬

"apachectl status/start/stop" Commands
This section provides a tutorial example on how to use 'sudo apachectl *' commands to control the Apache HTTP Server, httpd. 2023-05-29, ∼247🔥, 0💬

"apt list" - List Software Packages
This section provides a tutorial example on how to use the 'apt list' command to display software packages installed or available for Ubuntu computer. 2025-12-29, ∼243🔥, 0💬

Reset Host Name on Linux Systems
This section provides a tutorial example on how to view and change host name settings on Linux systems. 2023-05-27, ∼242🔥, 0💬

Thunderbird Configuratin for SMTPS Service
This section provides a tutorial example on how to configure Thunderbird use SMTPS (SMTP with SSL/TLS) service to securely sending out new emails. 2022-10-01, ∼238🔥, 0💬

What is Ubuntu
This section provides a quick introduction of Ubuntu, the most popular Linux distribution. 2025-12-29, ∼235🔥, 0💬

Verify Cache Memory with "cp" Command
This section provides a tutorial example to verify the cache memory usage in the RAM free space using a single 'cp' command. 2024-08-17, ∼235🔥, 0💬

"last/lastb" - Review Login History
This section provides a quick introduction of the 'last' and 'lastb' commands, which allows you to review login history and login attempts. 2023-12-28, ∼235🔥, 0💬

Dovecot - IMAP and POP3 Server
This chapter provides introductions and tutorial examples about Dovecot - IMAP and POP3 Server. Topics include installing, configuring, and starting Dovecot; testing Dovecot server using POP3 and IMAP commands with 'telnet'. 2022-10-01, ∼235🔥, 0💬

Setup FTP Sub-Directory for Local Users
This section provides a tutorial example on how to setup 'ftp' sub-directory for local users and allow them upload and download files using vsftpd on CentOS systems. 2024-01-03, ∼226🔥, 0💬

SquirrelMail Webmail Installation on CentOS
This section provides a tutorial example on how to install SquirrelMail on CentOS computers as a Web-based email client tool. 2023-05-29, ∼226🔥, 0💬

What Is Swap Space
This section describes swap space, reserved area on the hard disk that extends RAM to form a larger physical memory. 2025-12-29, ∼222🔥, 0💬

What Is Apache Tomcat
This section provides a quick introduction of Apache Tomcat, a Java application server, or as a Java servlet container. 2024-04-12, ∼222🔥, 0💬

"systemctl status/start/stop/enable/disable" Commands
This section provides a quick introduction of the 'systemctl' command, which allows you to start or stop a system service, check the status of a service, and enable or disable a service at the boot time. 2025-12-29, ∼220🔥, 0💬

"find" - Search for Files
This section provides a tutorial example on how to use 'find' command to search for files in a directory tree. '-name' and '-size' are 2 commonly used search conditions. 2022-10-01, ∼214🔥, 0💬

<< < … 5 6 7 8 9 10 11 12 13 14 15 … > >>   ∑:379  Sort:Date

Android ASP Astrology Big5 Bitcoin Blowfish Built-in C# Calendar CD-DVD Cheminformatics Chinese Cryptography DES Email Encoding Ethereum Flash GB2312 General H Herong History HTML Java JavaScript JDBC JSP JVM Linux Molecule Movie Music MySQL Neural Network Perl PHP Physics PKI Publication Python REST SOAP Sorting Swing TV Series UML Unicode VBScript Web Web-Services Windows WSDL XML XMLPad XSD XSL-FO