Section 7: overview, conventions, and miscellany
Varnish CLI – Varnish Command Line Interface Description Varnish as a command line interface (CLI) which can control and change most of the operational parameters and the configuration of Varnish, without interrupting the running service. The CLI can be used for the following tasks: configuration You can upload, change and delete VCL files from the…
uts_namespaces – overview of Linux UTS namespaces Description UTS namespaces provide isolation of two system identifiers: the hostname and the NIS domain name. These identifiers are set using sethostname(2) and setdomainname(2), and can be retrieved using uname(2), gethostname(2), and getdomainname(2). Changes made to these identifiers are visible to all other processes in the same UTS…
UTF-8 – an ASCII compatible multibyte Unicode encoding Description The Unicode 3.0 character set occupies a 16-bit code space. The most obvious Unicode encoding (known as UCS-2) consists of a sequence of 16-bit words. Such strings can contain—as part of many 16-bit characters—bytes such as ‘\0’ or ‘/’, which have a special meaning in filenames…
UTF-8 – an ASCII compatible multibyte Unicode encoding Description The Unicode 3.0 character set occupies a 16-bit code space. The most obvious Unicode encoding (known as UCS-2) consists of a sequence of 16-bit words. Such strings can contain—as part of many 16-bit characters—bytes such as ‘\0’ or ‘/’, which have a special meaning in filenames…
user_namespaces – overview of Linux user namespaces Description For an overview of namespaces, see namespaces(7). User namespaces isolate security-related identifiers and attributes, in particular, user IDs and group IDs (see credentials(7)), the root directory, keys (see keyrings(7)), and capabilities (see capabilities(7)). A process’s user and group IDs can be different inside and outside a user…
user-session-keyring – per-user default session keyring Description The user session keyring is a keyring used to anchor keys on behalf of a user. Each UID the kernel deals with has its own user session keyring that is shared by all processes with that UID. The user session keyring has a name (description) of the form…
user-keyring – per-user keyring Description The user keyring is a keyring used to anchor keys on behalf of a user. Each UID the kernel deals with has its own user keyring that is shared by all processes with that UID. The user keyring has a name (description) of the form _uid.<UID> where <UID> is the…
RXVT REFERENCE – FAQ, command sequences and other background information Synopsis # set a new font set printf ‘\33]50;%s\007’ 9×15,xft:Kochi" Mincho" # change the locale and tell rxvt-unicode about it export LC_CTYPE=ja_JP.EUC-JP; printf "\33]701;$LC_CTYPE\007" # set window title printf ‘\33]2;%s\007’ "new window title" Description This document contains the FAQ, the RXVT TECHNICAL REFERENCE documenting all…
RXVT REFERENCE – FAQ, command sequences and other background information Synopsis # set a new font set printf ‘\33]50;%s\007’ 9×15,xft:Kochi" Mincho" # change the locale and tell rxvt-unicode about it export LC_CTYPE=ja_JP.EUC-JP; printf "\33]701;$LC_CTYPE\007" # set window title printf ‘\33]2;%s\007’ "new window title" Description This document contains the FAQ, the RXVT TECHNICAL REFERENCE documenting all…
RXVT REFERENCE – FAQ, command sequences and other background information Synopsis # set a new font set printf ‘\33]50;%s\007’ 9×15,xft:Kochi" Mincho" # change the locale and tell rxvt-unicode about it export LC_CTYPE=ja_JP.EUC-JP; printf "\33]701;$LC_CTYPE\007" # set window title printf ‘\33]2;%s\007’ "new window title" Description This document contains the FAQ, the RXVT TECHNICAL REFERENCE documenting all…
RXVT REFERENCE – FAQ, command sequences and other background information Synopsis # set a new font set printf ‘\33]50;%s\007’ 9×15,xft:Kochi" Mincho" # change the locale and tell rxvt-unicode about it export LC_CTYPE=ja_JP.EUC-JP; printf "\33]701;$LC_CTYPE\007" # set window title printf ‘\33]2;%s\007’ "new window title" Description This document contains the FAQ, the RXVT TECHNICAL REFERENCE documenting all…
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…