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A command built into the shell itself. bash provides a number of commands The type command is a shell builtin that displays the kind of command the With this knowledge of what a command is, we can now search for the documentation In addition to the single-character shell options documented in the description of the set builtin command, bash interprets the following options when it is invoked Explanation: this pipes the entire output of man bash , i.e. bash's entire and has subsections explaining each bash builtin command) to the This section describes builtin commands which are unique to or have been extended in Bash. Some of these Builtin commands are contained within the shell itself. When the name of a builtin command is used as the first word of a simple command (see Simple Commands), the shell executes the command directly, without invoking another program. When an interactive login shell exits, or a non-interactive login shell executes the exit builtin command, bash reads and executes commands from the file For each name , indicate how it would be interpreted if used as a command name. If the -t option is used, type prints a single word which is one of ' alias ', ' function ', ' builtin ', ' file ' or ' keyword ', if name is an alias, shell function, shell builtin, disk file, or shell reserved word, respectively. 12 May 2019 Bash 5.0 API documentation with instant search, offline support, keyboard shortcuts, 4.1 Bourne Shell Builtins · 4.2 Bash Builtin Commands This section describes builtin commands which are unique to or have been extended in Bash. Some of these commands are specified in the posix standard.bash defines the following built-in commands: :, ., [, alias, bg, bind, break, builtin, .. The shell does not reset OPTIND automatically; it must be manually reset