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Unreachable Remote File Systems
This section provides a tutorial example on how to resolve the unreachable remote file system problem, which causes all related commands to hang, using the lazy un-mount command 'umount -l'. 2022-10-01, ∼294🔥, 0💬

What Is LDAP
Describes what is LDAP (Lightweight Directory Access Protocol) - a communication protocol for accessing and maintaining distributed directory information services over an Internet Protocol (IP) network. 2022-10-01, ∼294🔥, 0💬

NFS (Network File System)
This section provides a tutorial example on how to setup NFS server and client to share sub-directories as 'nfs' file systems. 2022-10-01, ∼292🔥, 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, ∼290🔥, 0💬

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, ∼289🔥, 0💬

"free" - Display Free and Used Memory
This section provides a tutorial example on how to display free and used memory information using the 'free' command on Linux systems. 2022-10-01, ∼289🔥, 0💬

"cURL" - Client for URL
This section provides a tutorial example on how to use 'cURL' command to send requests to a remote server in different protocols in URL format. 2023-05-24, ∼288🔥, 0💬

Users and Groups
This chapter provides introductions and tutorial on user and group management. Topics include commands to add and remove groups; commands to associate users with primary and supplementary groups; commands to file group ownership and group access permissions; commands to add and delete users; run 'su... 2022-10-01, ∼287🔥, 0💬

Install and Manage OpenJDK on CentOS
This section provides a tutorial example on how to install OpenJDK on CentOS 8 systems using 'dnf/yum' as the package manager. 2024-04-12, ∼286🔥, 0💬

Ubuntu Tutorials - Herong's Tutorial Examples
This book is a collection of notes and sample codes written by the author while he was learning Ubuntu systems. Topics include using GNOME desktop for graphical applications; using shell for command line tools; managing processes and memory; managing files and directories; using APT (Advanced Packag... 2025-12-29, ∼285🔥, 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, ∼285🔥, 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, ∼285🔥, 0💬

Verify Apache HTTP Server "httpd" Environment
This section provides a tutorial example on how to verify key areas of the Apache HTTP Server 'httpd' environment on Linux systems. 2022-10-01, ∼284🔥, 0💬

Install Python 2 Engine on CentOS
This section provides a tutorial example on how to install Python 2 engine to run old Python scripts and applications on CentOS systems. 2022-10-01, ∼284🔥, 0💬

Process Management
This chapter provides introductions and tutorial on managing processes on Linux systems. Topics include 'ps' to display processes; 'jobs' and other commands to manage background jobs; 'tmux' tool to manage multiple shells and keep them in background. 2022-10-01, ∼283🔥, 0💬

Network Firewall Tools on CentOS
This section provides quick descriptions on 3 major network firewall tools, 'firewalld/firewall-cmd', 'nftables/nft', and 'iptables' on CentOS 8 systems. 2022-10-01, ∼281🔥, 0💬

System Users and Groups
This section provides a tutorial example on how to add and manage system users and groups on Linux computers. 2022-10-01, ∼278🔥, 0💬

Set MySQL Server "root" Password on CentOS
This section provides a tutorial example on how to set or reset 'root' password, in case it has no password or you can not remember the password, for MySQL 8.0 server on CentOS 8 systems. 2022-10-01, ∼278🔥, 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, ∼277🔥, 0💬

Common Issues with Apache HTTPS Support
This section provides examples of some common issues related to HTTPS support on Apache HTTP Server. 2024-04-12, ∼277🔥, 0💬

"gzip/gunzip" - Compressed *.gz Files
This section provides a tutorial example on how to use 'gzip' and 'gunzip' commands to compress large files and restore them later. Compressed files will have the *.gz file name extension. 2022-10-01, ∼277🔥, 0💬

Cron Daemon, Table and Jobs
This section describes what is cron daemon and its related cron tables/jobs. 2022-10-01, ∼276🔥, 0💬

SSL/TLS Support on Tomcat 8 or Older
This section provides a tutorial example on how to configure Tomcat 8 or older to support SSL/TLS for the HTTPS service. 2024-04-12, ∼275🔥, 0💬

Upgrade OpenJDK on CentOS
This section provides a tutorial example on how to upgrade OpenJDK on CentOS 8 systems using package manager 'dnf/yum' and symbolic link manager 'update-alternatives' symbolic links for 'java/javac' command. 2024-04-12, ∼275🔥, 0💬

<< < … 2 3 4 5 6 7 8 9 10 11 12 … > >>   ∑: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