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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.
2025-12-29, ∼186🔥, 0💬

Memory Management
This chapter provides introductions and tutorial notes on memory management. Topics include memory layers and access speed; cache memory levels; virtual memory and physical memory mapping; page table; buffers, caches and swap spaces; memory usage reporting tools: free, ps, smem, pmap, /proc/meminfo,...
2025-12-29, ∼186🔥, 0💬

Move All Users to a New System
This section provides a tutorial example on how to move all users to a new Ubuntu system.
2025-12-29, ∼186🔥, 0💬

Bash Command Line Interpretation Steps
This section describes major processing steps, when a command line is entered at the Bash shell prompt.
2025-12-29, ∼186🔥, 0💬

"route" - Manage Routing Table
This section provides a tutorial example on how to use 'route' command to view and update the routing table for network traffic.
2025-12-29, ∼186🔥, 0💬

hostnamectl - Display System Information
This section provides a tutorial example on how to display operating system information using the 'uname' and other commands on Ubuntu systems.
2025-12-29, ∼186🔥, 0💬

Downloading and Installing JDK on Linux
This section provides a tutorial example on how to download and install JDK on Linux systems. The best way to install JDK on CentOS system is to the 'yum' package management tool.
2023-02-28, ∼186🔥, 0💬

Hangul, Chinese characters to Unicode Conversion
'UTF-8 (Unicode Transformation Format - 8-Bit)' tutorial book was cited in a forum article in Korean language in 2005.
2022-12-20, ∼186🔥, 0💬

Not Another Damn Password! Its the 21st Century After All
'SSL Specification Overview' tutorial was cited in a Open Source Developers Conference 2009 paper.
2022-12-18, ∼186🔥, 0💬

"Out-of-left-field" question for any ASP/VBScript Gurus
'Variable Declaration and Assignment Statement' tutorial was cited in a PC World forum post in 2007.
2022-11-04, ∼186🔥, 0💬

HashMap vs. HashTable vs. Baumstruktur
Java tutorial - 'HashSet, Vector, HashMap and Collection Classes' was cited in a Java USENET news group article in 2003.
2022-11-02, ∼186🔥, 0💬

PHP的des加密+ECB方式+PKCS5 补齐
'Block Padding in mcrypt' tutorial was cited in a csdn.net post in 2021.
2022-10-30, ∼186🔥, 0💬

CMD Prompt is blank, no text
'Command Processor AutoRun - Registry Value' tutorial was cited in a superuser.com article in 2020.
2022-10-25, ∼186🔥, 0💬

如何在windows下安装"The Eric Python IDE"
'Installing NMake 1.5' tutorial was cited in a codejzy.com article in 2021.
2022-10-24, ∼186🔥, 0💬

Java: Catching Stack Overflow
'Stack Overflow Error' tutorial was cited a in Mac Forums article in 2004.
2022-10-18, ∼186🔥, 0💬

Connect to SPOP3 Server using Java (Sockets)
'SslSocketClient.java - SSL Client Socket Example' tutorial was cited in an e-learn.cn article in 2019.
2022-10-05, ∼186🔥, 0💬

Most Popular Search Engines
The most popular search engines based on page referral request counts for year 2011 with no log files missing.
2022-10-01, ∼186🔥, 0💬

Most Popular Search Queries
The most popular search queries based on query strings used in referral URLs for year 2009 with 5 weeks log files missing.
2022-10-01, ∼186🔥, 0💬

Most Popular Search Terms
The most popular search terms based on query strings used in referral URLs for last 105 days of year 2006.
2022-10-01, ∼186🔥, 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.
2025-12-29, ∼185🔥, 0💬

APT Package Archives and Metadata
This section provides a quick introduction on APT (Advanced Package Tool) cached archive and metadata files.
2025-12-29, ∼185🔥, 0💬

"jobs" - Manage Background Jobs
This section provides a tutorial example on how to use 'jobs' command to display background jobs, which are processes with input detached the keyboard. You can start a background job by adding the 'ampersand' sign to the end of the commmad.
2025-12-29, ∼185🔥, 0💬

What Is PKI Certificate
This section describes what is PKI certificate and what are basic data fields included in a PKI certificate.
2024-11-27, ∼185🔥, 0💬

End Entity Certificate Example
This section provides an end entity certificate example and explanations of its data fileds.
2024-11-27, ∼185🔥, 0💬

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