export¶

A new child process forked from a parent process does not inherit parent's variables by default. The export command marks an environment variable to be exported with any newly forked child processes and thus it allows a child process to inherit all marked variables.

unset¶

References¶

https://stackoverflow.com/questions/6877727/how-do-i-delete-an-exported-environment-variable

Parse Arguments in Bash¶

Environment Variables¶

export

unset

Tips and Traps¶

1. explainshell.com is a great place for learning shell.

2. Bash-it/bash-it is a great community driven Bash framework.

3. It is suggested that you avoid writing complicated Bash scripts. IPython is a much better alternative.

4. Do NOT use ; to delimit paths passed to a shell command because ;

Comments¶

1. As long as the class name is not need at definition time of the class, it is OK to use it.

You cannot use a class in default values of the __init__ function of the class.