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eval - evaluate the specified commands
======================================
Synopsis
--------
.. synopsis::
eval [COMMANDS ...]
Description
-----------
**eval** evaluates the specified parameters as a command.
If more than one parameter is specified, all parameters will be joined using a space character as a separator.
If the command does not need access to stdin, consider using :doc:`source <source>` instead.
If no piping or other compound shell constructs are required, variable-expansion-as-command, as in ``set cmd ls -la; $cmd``, is also an option.
Example
-------
The following code will call the ls command and truncate each filename to the first 12 characters.
::
set cmd ls \| cut -c 1-12
eval $cmd
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