[sys]

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§ 4.153  - [sys] Built-InMnemonic aid: sys for SYStem
This provides a means to execute a system command.
If the command creates output, it will be incorporated into the output stream.
If the command encounters a problem, the stderr results will also be incorporated into the output stream.
If you wish to suppress the output of the command with regard to the output stream, execute it within a  [comment]  and that will prevent the results from appearing.

[sys shellCommand]

[sys date]
[comment [sys date]]

Wed Feb 18 12:52:43 MST 2026

Wed Feb 18 12:52:43 MST 2026
Other built-ins used here:  [comment] 
As shell commands can present a significant security risk, there is a means to disable this capability when instantiating the class. If noshell=True then  [sys]  does nothing:

mod = macro(noshell=True)

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This manual was generated with wtfm on February 18th, 2026 at 12:52 MT wtfm uses aa_macrov3 and SqLite aa_macrov3 uses Python 3