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The Single UNIX Specification (SUS) specifies that who should list information about accessible users. The XSI extension also specifies that the data of the username, terminal, login time, process ID, and time since last activity occurred on the terminal, furthermore, an alternate system database used for user information can be specified as an optional argument to who.
A Linux User Group or Linux Users' Group (LUG) or GNU/Linux User Group (GLUG) is a private, generally non-profit or not-for-profit organization that provides support and/or education for Linux users, particularly for inexperienced users. The term commonly refers to local groups that meet in person but is also used to refer to online support ...
getent is a Unix command that helps a user get entries in a number of important text files called databases. This includes the passwd and group databases which store user information – hence getent is a common way to look up user details on Unix.
The Unix and Linux access rights flags setuid and setgid (short for set user identity and set group identity) [1] allow users to run an executable with the file system permissions of the executable's owner or group respectively and to change behaviour in directories. They are often used to allow users on a computer system to run programs with ...
In Unix-like systems, multiple users can be put into groups. POSIX and conventional Unix file system permissions are organized into three classes, user, group, and others.The use of groups allows additional abilities to be delegated in an organized fashion, such as access to disks, printers, and other peripherals.
A Linux User Group (LUG) is a meeting of people who like Linux and use it. Each country will usually have a national LUG which may administer the groups, offer free services etc. and it is also possible for groups to get sponsorships from various commercial organisations, SuSE is one example.
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Computer user groups may consist of members who primarily use a specific operating system, such as Linux. While many hackers use free and open source software, others use Macintosh, RISC OS, Windows and Amiga OS. There are also other user groups that concentrate on either Mac OS (Macintosh User Group or MUG) or Linux (Linux User Group or LUG).