uri, url, urn – uniform resource identifier (URI), including a URL or URN Synopsis URI = [ absoluteURI | relativeURI ] [ "#" fragment ] absoluteURI = scheme ":" ( hierarchical_part | opaque_part ) relativeURI = ( net_path | absolute_path | relative_path ) [ "?" query ] scheme = "http" | "ftp" | "gopher" |…
uri, url, urn – uniform resource identifier (URI), including a URL or URN Synopsis URI = [ absoluteURI | relativeURI ] [ "#" fragment ] absoluteURI = scheme ":" ( hierarchical_part | opaque_part ) relativeURI = ( net_path | absolute_path | relative_path ) [ "?" query ] scheme = "http" | "ftp" | "gopher" |…
uri, url, urn – uniform resource identifier (URI), including a URL or URN Synopsis URI = [ absoluteURI | relativeURI ] [ "#" fragment ] absoluteURI = scheme ":" ( hierarchical_part | opaque_part ) relativeURI = ( net_path | absolute_path | relative_path ) [ "?" query ] scheme = "http" | "ftp" | "gopher" |…
urfkill – RFKill Switches Management Description urfkill provides an interface to enumerate rfkill switches on the system and control system-wide rfkill switches management. Any application can access the org.freedesktop.URfkill service on the system message bus. Some operations (such as setting soft block on the device) is restricted using PolicyKit. Author Written by Gary Ching-Pang Lin…
upstart-events – Well-known Upstart events summary Event Summary This manual page summarises well-known events generated by Upstart running both as the init(8) daemon (process ID 1) and a Session Init (process that supervises a user session). It is not an exhaustive list of all possible events, but rather details a standard set of events expected…
unixODBC – An ODBC implementation for Unix Description ODBC is an open specification for providing application developers with a predictable API with which to access Data Sources. Data Sources include SQL Servers and any Data Source with an ODBC Driver. The unixODBC Project goals are to develop and promote unixODBC to be the definitive standard…
unix – sockets for local interprocess communication Synopsis #include <sys/socket.h> #include <sys/un.h> unix_socket = socket(AF_UNIX, type, 0); error = socketpair(AF_UNIX, type, 0, int *sv); Description The AF_UNIX (also known as AF_LOCAL) socket family is used to communicate between processes on the same machine efficiently. Traditionally, UNIX domain sockets can be either unnamed, or bound to…
units – decimal and binary prefixes Description Decimal prefixes The SI system of units uses prefixes that indicate powers of ten. A kilometer is 1000 meter, and a megawatt is 1000000 watt. Below the standard prefixes. Prefix Name Value y yocto 10^-24 = 0.000000000000000000000001 z zepto 10^-21 = 0.000000000000000000001 a atto 10^-18 = 0.000000000000000001 f…
uniqbeg – unique beginners for noun hierarchies Description All of the WordNet noun synsets are organized into hierarchies, headed by the unique beginner synset for entity in the file noun.Tops. { entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving)) } Notes The lexicographer files are…
unicode – universal character set Description The international standard ISO 10646 defines the Universal Character Set (UCS). UCS contains all characters of all other character set standards. It also guarantees "round-trip compatibility"; in other words, conversion tables can be built such that no information is lost when a string is converted from any other encoding…
undocumented – No manpage for this program, utility or function. Description This program, utility or function does not have a useful manpage. Before opening a bug to report this, please check with the Debian Bug Tracking System (BTS) at <http://bugs.debian.org/> if a bug has already been reported. If not, you can submit a wishlist bug…
udplite – Lightweight User Datagram Protocol Synopsis #include <sys/socket.h> sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDPLITE); Description This is an implementation of the Lightweight User Datagram Protocol (UDP-Lite), as described in RFC 3828. UDP-Lite is an extension of UDP (RFC 768) to support variable-length checksums. This has advantages for some types of multimedia transport that may be…
udp – User Datagram Protocol for IPv4 Synopsis #include <sys/socket.h> #include <netinet/in.h> #include <netinet/udp.h> udp_socket = socket(AF_INET, SOCK_DGRAM, 0); Description This is an implementation of the User Datagram Protocol described in RFC 768. It implements a connectionless, unreliable datagram packet service. Packets may be reordered or duplicated before they arrive. UDP generates and checks checksums…
udisks – Storage Management Description udisks provides an interface to enumerate storage devices and perform operations on them. Any application can access the org.freedesktop.UDisks service on the system message bus. Some operations (such as formatting disks etc.) is restricted using polkit. Device Information On Linux, udisks relies on recent versions of udev(7) and the kernel….
udev – Dynamic device management Description udev supplies the system software with device events, manages permissions of device nodes and may create additional symlinks in the /dev/ directory, or renames network interfaces. The kernel usually just assigns unpredictable device names based on the order of discovery. Meaningful symlinks or network device names provide a way…
tuned-profiles – description of basic tuned profiles Description These are the base profiles which are mostly shipped in the base tuned package. They are targeted to various goals. Mostly they provide performance optimizations but there are also profiles targeted to low power consumption, low latency and others. You can mostly deduce the purpose of the…
tuned-profiles-origin-node – description of profiles provided for OpenShift Description These profiles are provided for OpenShift nodes. They provide performance optimizations for OpenShift Nodes running on either bare metal (origin-node-host) or virtual machines (origin-node-guest). Profiles The following profiles are provided: origin-node-host Profile optimized for OpenShift hosts (bare metal). It is based on throughput-performance profile. It additionally…
tuned-profiles-oracle – description of profiles provided for the Oracle Description These profiles are provided for the Oracle loads. Profiles The following profiles are provided: oracle Profile optimized for Oracle databases based on throughput-performance profile. It additionaly disables transparent huge pages and modifies some other performance related kernel parameters. Files /etc/tuned/* /usr/lib/tuned/* See Also tuned(8) tuned-adm(8)…
tuned-profiles-compat – description of profiles provided for backward compatibility Description These profiles are provided for backward compatibility with the tuned-1x. They are no longer mainained and may be dropped anytime in the future. It’s not recommended to use them for purposes other than backward compatibility. Some of them are only aliases to base tuned profiles….
tuned-profiles-atomic – description of profiles provided for the Project Atomic Description These profiles are provided for the Project Atomic. They provides performance optimizations for the Atomic hosts (bare metal) and virtual guests. Profiles The following profiles are provided: atomic-host Profile optimized for Atomic hosts (bare metal). It is based on throughput-performance profile. It additionally increases…