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exec - execute command in current process
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Synopsis
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exec COMMAND [OPTIONS...]
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Description
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`` exec `` replaces the currently running shell with a new command. On successful completion, `` exec `` never returns. `` exec `` cannot be used inside a pipeline.
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Example
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`` exec emacs `` starts up the emacs text editor, and exits `` fish `` . When emacs exits, the session will terminate.