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  2. User space and kernel space - Wikipedia

    en.wikipedia.org/wiki/User_space_and_kernel_space

    The term user space (or userland) refers to all code that runs outside the operating system's kernel. User space usually refers to the various programs and libraries that the operating system uses to interact with the kernel: software that performs input/output , manipulates file system objects, application software , etc.

  3. User identifier - Wikipedia

    en.wikipedia.org/wiki/User_identifier

    User identifier. Unix-like operating systems identify a user by a value called a user identifier, often abbreviated to user ID or UID. The UID, along with the group identifier (GID) and other access control criteria, is used to determine which system resources a user can access. The password file maps textual user names to UIDs.

  4. Comparison of command shells - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_command_shells

    JP Software command-line processors provide user-configurable colorization of file and directory names in directory listings based on their file extension and/or attributes through an optionally defined %COLORDIR% environment variable. For the Unix/Linux shells, this is a feature of the ls command and the terminal.

  5. Basic access authentication - Wikipedia

    en.wikipedia.org/wiki/Basic_access_authentication

    In the context of an HTTP transaction, basic access authentication is a method for an HTTP user agent (e.g. a web browser) to provide a user name and password when making a request. In basic HTTP authentication, a request contains a header field in the form of Authorization: Basic <credentials>, where <credentials> is the Base64 encoding of ID ...

  6. Central Authentication Service - Wikipedia

    en.wikipedia.org/wiki/Central_Authentication_Service

    Central Authentication Service. The Central Authentication Service ( CAS) is a single sign-on protocol for the web. [1] Its purpose is to permit a user to access multiple applications while providing their credentials (such as user ID and password) only once. It also allows web applications to authenticate users without gaining access to a user ...

  7. passwd - Wikipedia

    en.wikipedia.org/wiki/Passwd

    passwd is a command on Unix, Plan 9, Inferno, and most Unix-like operating systems used to change a user's password. The password entered by the user is run through a key derivation function to create a hashed version of the new password, which is saved. Only the hashed version is stored; the entered password is not saved for security reasons.

  8. Kerberos (protocol) - Wikipedia

    en.wikipedia.org/wiki/Kerberos_(protocol)

    Type. Authentication protocol. Website. web .mit .edu /kerberos /. Kerberos ( / ˈkɜːrbərɒs /) is a computer-network authentication protocol that works on the basis of tickets to allow nodes communicating over a non-secure network to prove their identity to one another in a secure manner.

  9. su (Unix) - Wikipedia

    en.wikipedia.org/wiki/Su_(Unix)

    The su command was removed from GNU coreutils as of release 8.18 (2012-08-12) and is currently included in the util-linux package. Usage. When run from the command line, su asks for the target user's password, and if authenticated, grants the operator access to that account and the files and directories that account is permitted to access.