systemd-udevd.service(8)


NAME

   systemd-udevd.service, systemd-udevd-control.socket, systemd-udevd-
   kernel.socket, systemd-udevd - Device event managing daemon

SYNOPSIS

   systemd-udevd.service

   systemd-udevd-control.socket

   systemd-udevd-kernel.socket

   /lib/systemd/systemd-udevd [--daemon] [--debug] [--children-max=]
                              [--exec-delay=] [--event-timeout=]
                              [--resolve-names=early|late|never]
                              [--version] [--help]

DESCRIPTION

   systemd-udevd listens to kernel uevents. For every event, systemd-udevd
   executes matching instructions specified in udev rules. See udev(7).

   The behavior of the daemon can be configured using udev.conf(5), its
   command line options, environment variables, and on the kernel command
   line, or changed dynamically with udevadm control.

OPTIONS

   --daemon
       Detach and run in the background.

   --debug
       Print debug messages to standard error.

   --children-max=
       Limit the number of events executed in parallel.

   --exec-delay=
       Delay the execution of RUN instructions by the given number of
       seconds. This option might be useful when debugging system crashes
       during coldplug caused by loading non-working kernel modules.

   --event-timeout=
       Set the number of seconds to wait for events to finish. After this
       time, the event will be terminated. The default is 180 seconds.

   --resolve-names=
       Specify when systemd-udevd should resolve names of users and
       groups. When set to early (the default), names will be resolved
       when the rules are parsed. When set to late, names will be resolved
       for every event. When set to never, names will never be resolved
       and all devices will be owned by root.

   --help
       Print a short help text and exit.

   --version
       Print a short version string and exit.

KERNEL COMMAND LINE

   Parameters starting with "rd." will be read when systemd-udevd is used
   in an initrd.

   udev.log-priority=, rd.udev.log-priority=
       Set the log level.

   udev.children-max=, rd.udev.children-max=
       Limit the number of events executed in parallel.

   udev.exec-delay=, rd.udev.exec-delay=
       Delay the execution of RUN instructions by the given number of
       seconds. This option might be useful when debugging system crashes
       during coldplug caused by loading non-working kernel modules.

   udev.event-timeout=, rd.udev.event-timeout=
       Wait for events to finish up to the given number of seconds. This
       option might be useful if events are terminated due to kernel
       drivers taking too long to initialize.

   net.ifnames=
       Network interfaces are renamed to give them predictable names when
       possible. It is enabled by default; specifying 0 disables it.

SEE ALSO

   udev.conf(5), udev(7), udevadm(8)





Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.





Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.


Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.





Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.


Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.





Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.


Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.