[SOLVED] how to use a variable for a terminal command
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Yes. As Nylex said. This is the way the shell acts: it splits a command line into words and if it encounters special characters the shell makes the proper substitutions. After the command line has been somehow rebuilt, it is executed. For example, if you type:
the shell splits this line into two words. The first word must be a built-in or an external command, which will be searched inside the directories listed in the PATH environment variable (unless you use the absolute path). The second word contains a $ followed by a valid token for variable names, the shell searches in memory the value of that variable and substitute it. The resulting command is:
and this one is the actual statement that will be executed. More details about shell substitutions (also called expansions), here.
File "test.py", line 18, in <module>
File "/usr/lib/python2.7/subprocess.py", line 493, in call
return Popen(*popenargs, **kwargs).wait()
File "/usr/lib/python2.7/subprocess.py", line 679, in __init__
File "/usr/lib/python2.7/subprocess.py", line 1249, in _execute_child
OSError: [Errno 2] No such file or directory