linux system

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, […]

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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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Recently updated/posted Linux and UNIX FAQ (mostly useful to Linux/UNIX new administrators or users) : CentOS Linux install kernel headers to build vmware / 3rd party modules Linux / UNIX : Argument list too long error in shell and solution Howto: Debian / Ubuntu Linux Install PostgreSQL Database Server Howto Display text files in a […]

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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 […]

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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, […]

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From my mail bag:

I would like to run few commands such as stop or start web server as a root user. How do I allow a normal user to run these commands as root?

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