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Saved by uncleflo on January 4th, 2019.
A daemon (or service) is a background process that is designed to run autonomously,with little or not user intervention. The Apache web server http daemon (httpd) is one such example of a daemon. It waits in the background listening on specific ports, and serves up pages or processes scripts, based on the type of request. Creating a daemon in Linux uses a specific set of rules in a given order. Knowing how they work will help you understand how daemons operate in userland Linux, but can operate with calls to the kernel also. In fact, a few daemons interface with kernel modules that work with hardware devices, such as external controller boards, printers,and PDAs. They are one of the fundamental building blocks in Linux that give it incredible flexibility and power. Throughout this HOWTO, a very simple daemon will be built in C. As we go along, more code will be added, showing the proper order of execution required to get a daemon up and running.
daemon forking portability fork kernel terminate compile coding directory multitude files execution loop setup check apache logging skeleton methodology structured code function technical development howto application design architecture
Saved by uncleflo on January 3rd, 2019.
A-Z Windows Commands, Batch files, Dos and PowerShell. Fsutil.exe is a built in filesystem tool that is useful to do file system related operations from command line. We can create a file of required size using this tool. The above commands create a 1 MB file dummy.txt within few seconds. If you want to create 1 GB file you need to change the second command as below.
Saved by uncleflo on December 20th, 2018.
Our appetite to create new products and buy new products is infinite. The planet's resources aren't. But it's okay because we can have both: new products and a better environment. Nylon waste from landfills and oceans around the world is transformed into ECONYL® regenerated nylon. It's exactly the same as brand new nylon and can be recycled, recreated and remoulded again and again. That means you can create new products and buy new products without having to use new resources. The future is circular. ECONYL® regenerated nylon is a product that can help you close the loop. Made from waste, it's infinitely recyclable and can unleash infinite possibilities for makers, creators and consumers. It's all part of the ECONYL® brand vision to make the world a better place by pioneering closed loop regeneration processes and delivering sustainable products.
Saved by uncleflo on April 18th, 2018.
The EXPLAIN statement provides information about how MySQL executes statements. EXPLAIN works with SELECT, DELETE, INSERT, REPLACE, and UPDATE statements. EXPLAIN returns a row of information for each table used in the SELECT statement. It lists the tables in the output in the order that MySQL would read them while processing the statement. MySQL resolves all joins using a nested-loop join method. This means that MySQL reads a row from the first table, and then finds a matching row in the second table, the third table, and so on. When all tables are processed, MySQL outputs the selected columns and backtracks through the table list until a table is found for which there are more matching rows. The next row is read from this table and the process continues with the next table.
Saved by uncleflo on April 5th, 2015.
Saved by uncleflo on August 9th, 2014.
Kpartx can be used to set up device mappings for the partitions of any partitioned block device. It is part of the Linux multipath-tools. With kpartx -l imagefile you get an overview of the partitions in the image file and with kpartx -a imagefile the partitions will accessible via /dev/mapper/loop0pX (X is the number of the partition). You can mount it now with mount /dev/mapper/loop0pX /mnt/ -o loop,ro. After unmounting you can disconnect the mapper devices with kpartx -d imagefile.
Saved by uncleflo on August 9th, 2014.
This situation might not affect everyone, but it struck me today and left me scratching my head. Consider a situation where you need to clone one drive to another with dd or when a hard drive is failing badly and you use dd_rescue to salvage whatever data you can.
Saved by uncleflo on July 15th, 2014.
VirtualDJ is the application that DJs use when they want to use a computer to play their music. Because being a DJ is more than just pressing play, DJs cannot just use iTunes or Media Player to perform a mix. They need special controls like crossfaders, loops, effects, etc, in order to "mix" the songs. VirtualDJ is the most used DJ software on the planet, with more than 150 million downloads, and is used by everybody from bedroom DJs to international superstars. Unlike some competitors, it doesn't rely on your years of experience learning how to DJ, but instead uses modern technology to help you mix better by focusing on the artistic side of the mix.
Saved by uncleflo on January 24th, 2014.
jQuery provides an object iterator utility called $.each() as well as a jQuery collection iterator: .each(). These are not interchangeable. In addition, there are a couple of helpful methods called $.map() and .map() that can shortcut one of our common iteration use cases. $.each() is a generic iterator function for looping over object, arrays, and array-like objects. Plain objects are iterated via their named properties while arrays and array-like objects are iterated via their indices. $.each() is essentially a drop-in replacement of a traditional for or for-in loop.
Saved by uncleflo on February 28th, 2012.
Through our sophisticated life safety, fire detection and emergency devices, people's lives and property are kept protected, helping make the world a safer place to live. We strive to improve the lifestyle of each employee, stockholder, and member of the community. Hochiki would like to introduce the HCA Conventional Fire Alarm Control Panel. The HCA series will be available in a 2, 4, or 8 zone conventional panel design. The HCA series are fully programmable using simple front panel menu options and will support releasing of agent on the 4 and 8 zone models. This panel offers programming features to the user and is a single board construction which is installer friendly. The panel will be compatible with a wide range of Hochiki America detection devices. Click here to view the HCA data sheet.
Saved by uncleflo on March 21st, 2011.
VES Loop Explorer 2 Installation Instructions The installation is now 2 parts - AIR application (native installer - different for each OS) and Java runtime Please read all the instructions for each section before installing a section
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