Text parsing?

[Jefferson San Juan]

> For what purposes will I find I need to use all these tools you write
> about?  
> I'm talking about awk, ed, ex, etc.  I haven't found the need to do so, yet, 
> but I'd like to possibly learn this stuff before I really do need it.

Such programs are usually used in shell scripts to parse out a part or some 
parts of a text output either from a text file or an output from a program 
such as ifconfig for instance.

- Jefferson

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