Fg (Unix)
Encyclopedia
fg is a job control command in Unix
and Unix-like
operating systems that resumes execution of a suspended process
by bringing it to the foreground and thus redirecting its standard input and output streams to the user's terminal
. fg is required to be included in an operating system in order for it to be POSIX
compliant.
Unix
Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna...
and Unix-like
Unix-like
A Unix-like operating system is one that behaves in a manner similar to a Unix system, while not necessarily conforming to or being certified to any version of the Single UNIX Specification....
operating systems that resumes execution of a suspended process
Process (computing)
In computing, a process is an instance of a computer program that is being executed. It contains the program code and its current activity. Depending on the operating system , a process may be made up of multiple threads of execution that execute instructions concurrently.A computer program is a...
by bringing it to the foreground and thus redirecting its standard input and output streams to the user's terminal
Computer terminal
A computer terminal is an electronic or electromechanical hardware device that is used for entering data into, and displaying data from, a computer or a computing system...
. fg is required to be included in an operating system in order for it to be POSIX
POSIX
POSIX , an acronym for "Portable Operating System Interface", is a family of standards specified by the IEEE for maintaining compatibility between operating systems...
compliant.
See also
- bgBg (Unix)bg is a job control command in Unix and Unix-like operating systems that resumes execution of a suspended process without bringing it to the foreground; the resumed process continues to execute in the background without receiving user input from the terminal. bg is required to be included in an...
, the complementary command that sends a process to the background - SIGCONTSIGCONTOn POSIX-compliant platforms, SIGCONT is the signal sent to restart a process previously paused by the SIGSTOP or SIGTSTP signal. The symbolic constant for SIGCONT is defined in the header file signal.h. Symbolic signal names are used because signal numbers can vary across platforms.-Etymology:SIG...