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Enable Remote Access to "httpd" Service
This section provides a tutorial example on how to enable remote access Web pages served by the 'httpd' service by opening the firewall for 'http' service default port 80.
2023-06-22, ∼205🔥, 0💬

"compress/uncompress" - Compressed *.Z Files
This section provides a tutorial example on how to use 'compress' and 'uncompress' commands to compress large files and restore them later. Compressed files will have the *.Z file name extension.
2022-10-01, ∼205🔥, 0💬

References
List of reference materials used in this book.
2022-10-01, ∼205🔥, 0💬

"ps" - Display Current Processes
This section provides a tutorial example on how to use 'ps' command to display current process on the system.
2022-10-01, ∼204🔥, 0💬

Start/Stop Apache Tomcat
This section provides a tutorial example on how to start and stop Apache Tomcat on Linux systems.
2024-04-12, ∼203🔥, 0💬

What Is YUM
This section provides a quick introduction on YUM (Yellowdog Update Modified), which is a software package manager for RPM (RedHat Package Manager) based Linux distributions.
2022-10-01, ∼203🔥, 0💬

smem - Process Memory Usage Report
This section provides a tutorial on how to install 'smem' and use it to report memory usage of each running process.
2024-08-17, ∼202🔥, 0💬

What Is RPM
This section provides a quick introduction on RPM (RedHat Package Manager), which is a free and open packaging system on Red Hat Enterprise Linux as well as other Linux and UNIX systems.
2022-10-01, ∼202🔥, 0💬

Files and Directories
This chapter provides introductions and tutorial on file and directory management. Topics include commands to search and find files, read text files in different ways, split, join and truncate files, compress and restore files, archive and extract filesm.
2022-10-01, ∼202🔥, 0💬

Change PHP Configuration Settings
This section provides a tutorial example on how to change PHP configuration settings, like increasing upload_max_filesize and post_max_size to upload large files with PHP scripts.
2022-10-01, ∼202🔥, 0💬

Postfix - Mail Transport Agent (MTA)
This chapter provides introductions and tutorial examples about Postfix - Mail Transport Agent (MTA). Topics include installing, configuring, and starting Postfix; testing Postfix using STMP commands with 'telnet'; turn on 'SMTP Submission' and 'SMTPS' services; using 'postconf' command.
2022-10-01, ∼201🔥, 0💬

"zip" and "unzip" - Create and Extract ZIP Files
This section provides a tutorial example on how to use 'zip' command to compress multiple file and sub-directories into a ZIP file and use 'unzip' command to extract files out of a ZIP file.
2022-10-01, ∼201🔥, 0💬

"more", "head" and "cat" - Read Files
This section provides a tutorial example on how to use 'more', 'head' or 'tail' commands to read text files one screen at a time, to read the first 10 lines, or to read the last 10 lines.
2022-10-01, ∼200🔥, 0💬

"tar -c" and "tar -x" - Create and Extract Archive Files
This section provides a tutorial example on how to use 'tar -c' command to compress multiple file and sub-directories into an archive file and use 'tar -x' command to extract files out of an archive file.
2022-10-01, ∼199🔥, 0💬

Virtual Memory Mapping and Page Table
This section describes virtual memory page, physical memory frame, and page table that maps a page to a frame.
2024-08-17, ∼198🔥, 0💬

Performance Comparison of Inserting Integers vs. Strings
This section provides a tutorial example on how to check performance comparison between inserting integers and inserting strings to MySQL database.
2022-10-01, ∼198🔥, 0💬

Test FTP Access Locally on CentOS
This section provides a tutorial example on how to use the 'ftp' client program to access the 'vsftpd' server locally on the same CentOS computer.
2024-01-01, ∼197🔥, 0💬

/proc/{id}/maps - Process Memory Map
This section describes the pseudo file '/proc/{id}/maps' that represents virtual memory map of a given process.
2024-08-17, ∼196🔥, 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, ∼195🔥, 0💬

Buffer Memory and Cache Memory
This section describes buffer memory and cache memory, which are temporary memory allocations in the free RAM area to improve data input and output performance on hard disk.
2024-08-17, ∼194🔥, 0💬

Install Apache HTTP Server "httpd"
This section provides a tutorial example on how to install Apache HTTP Server 'httpd' on CentOS 8 systems.
2023-05-29, ∼194🔥, 0💬

Move All Users to a New System
This section provides a tutorial example on how to move all users to a new Linux system.
2022-10-01, ∼194🔥, 0💬

MySQL Server Data Backups on CentOS
This section provides a tutorial example on how to create backups of MySQL databases and load it back to another MySQL server for MySQL 8.0 server on CentOS 8 systems.
2022-10-01, ∼193🔥, 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.
2024-08-17, ∼192🔥, 0💬

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