preload is a free Linux. It runs in background and records statistics about usage of more frequently-used programs. These programs are loaded into a Linux memory. Thus results is faster application startup times. From the project home page:
preload is an adaptive readahead daemon. It monitors applications that users run, and by analyzing this data, predicts what applications users might run, and fetches those binaries and their dependencies into memory for faster startup times.
(Fig. 01: preload in action - saving time while loading Linux apps)
There is a nice tutorial published by Techthrob about installing and configuring Techthrob under Debian / Ubuntu Linux systems.
=> Drastically Speed up your Linux System with Preload
Yesterday I wrote about increasing local port range with net.ipv4.ip_local_port_range proc file. There is also /proc/sys/kernel/pid_max file, which specifies the value at which PIDs wrap around (i.e., the value in this file is one greater than the maximum PID). The default value for this file, 32768, results in the same range of PIDs as on earlier kernels (< =2.4). The value in this file can be set to any value up to 2^22 (PID_MAX_LIMIT, approximately 4 million).
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If you are a developer for the GNU/Linux system, this book will help you to write and/or develop GNU/Linux software that works the way users expect it to.
Advanced Linux Programming is published under the Open Publication License, Version 1, no options exercised. (Due to an oversight in final production, the copyright notice on the book is incorrect.) The full text may be downloaded from this site. Code samples in the book are covered by the GNU General Public License and are also available.
Chapter 01 - Advanced Unix Programming with Linux
Chapter 02 - Writing Good GNU/Linux Software
Chapter 03 - Processes
Chapter 04 - Threads
Chapter 05 - Interprocess Communication
Chapter 06 - Mastering Linux
Chapter 07 - The /proc File System
Chapter 08 - Linux System Calls
Chapter 09 - Inline Assembly Code
Chapter 10 - Security
Chapter 11 - A Sample GNU/Linux Application
=> Advanced Linux programming book, by Mark Mitchell, Jeffrey Oldham, Alex Samuel (via Digg)
Anil ask a question (via email):
What is umask and how is it determined on a Linux system?
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This is a full-size PDF version ( poster ) from Oreilly.
Anatomy of a Linux System poster try to put most important things together. The result is indeed encyclopedic. Supporting the illustration are 19 written topics, with brief historical and educational descriptions of technologies such as Peer-to-Peer Communication, XML and HTML, Samba, Unix Command-Line Utilities, and even Java. Each topic has a list of key Web sites and useful books, including titles that don't belong to O'Reilly--part of Tim's insistence that the poster serve as a complete Linux resource. The poster also lists Linux magazines, conferences, major distributors, and, of course, major contributors.
=> Download Link [oreillynet.com] (163K)