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  2. Shebang (Unix) - Wikipedia

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

    On Linux and Minix, an interpreter can also be a script. A chain of shebangs and wrappers yields a directly executable file that gets the encountered scripts as parameters in reverse order. A chain of shebangs and wrappers yields a directly executable file that gets the encountered scripts as parameters in reverse order.

  3. Time-of-check to time-of-use - Wikipedia

    en.wikipedia.org/wiki/Time-of-check_to_time-of-use

    In software development, time-of-check to time-of-use ( TOCTOU, TOCTTOU or TOC/TOU) is a class of software bugs caused by a race condition involving the checking of the state of a part of a system (such as a security credential) and the use of the results of that check. TOCTOU race conditions are common in Unix between operations on the file ...

  4. Luhn algorithm - Wikipedia

    en.wikipedia.org/wiki/Luhn_algorithm

    Luhn algorithm. The Luhn algorithm or Luhn formula, also known as the " modulus 10" or "mod 10" algorithm, named after its creator, IBM scientist Hans Peter Luhn, is a simple check digit formula used to validate a variety of identification numbers. It is described in US patent 2950048A, granted on 23 August 1960. [ 1]

  5. Comparison of mail servers - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_mail_servers

    The comparison of mail servers covers mail transfer agents (MTAs), mail delivery agents, and other computer software that provide e-mail services. Unix -based mail servers are built using a number of components because a Unix-style environment is, by default, a toolbox [ 1] operating system. A stock Unix-like server already has internal mail ...

  6. Java version history - Wikipedia

    en.wikipedia.org/wiki/Java_version_history

    The Java language has undergone several changes since JDK 1.0 as well as numerous additions of classes and packages to the standard library.Since J2SE 1.4, the evolution of the Java language has been governed by the Java Community Process (JCP), which uses Java Specification Requests (JSRs) to propose and specify additions and changes to the Java platform.

  7. List of TCP and UDP port numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_TCP_and_UDP_port...

    The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. [3] They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the ...

  8. List of URI schemes - Wikipedia

    en.wikipedia.org/wiki/List_of_URI_schemes

    file - File URI scheme. ftp – File Transfer Protocol. http – Hypertext Transfer Protocol. https – Hypertext Transfer Protocol Secure. imap – Internet Message Access Protocol. irc – Internet Relay Chat. nntp – Network News Transfer Protocol. as well as many lesser known schemes like: acap – Application Configuration Access Protocol.

  9. PHP - Wikipedia

    en.wikipedia.org/wiki/PHP

    PHP Programming at Wikibooks. PHP is a general-purpose scripting language geared towards web development. [ 8] It was originally created by Danish-Canadian programmer Rasmus Lerdorf in 1993 and released in 1995. [ 9][ 10] The PHP reference implementation is now produced by the PHP Group. [ 11]