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Some time ago somebody told me about 'screen' in an irc chat. He just started to use screen and enjoyed the power of this command and wanted to share this experience with me. I now use this tool very often when I work on a remote system and other people should be able to follow the command I entered and which results I get. This was in particular useful when people asked for help because they had issues with Linux and they allowed me to access their system. That way they easily were able to follow all the activities I executed on their system. But it's also for other tasks very helpful and I now use it quite often.
I just checked the man page of screen and detected there are much more features available. I summarize the features on the following pages and list useful keyboard shortcuts.
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Today I found in c't 22/2014 22/2014 (German computer journal) a nice article with the same title. Examples show how easy you can combine various commandlien tools in Linux and follow the Unix Philosophy and manipulate without any Programming text files, split and join them. Applications are to process csv files, log files or word frequency analysis and much more. recently I had a similar problem with text files which I solved using most of the tools mentioned in the article. But I was suprosed to read that the tools are much more powerful when you use special parameters. It's a good idea to read the man pages of the tools. On following pages I summarized all tools together with their most powerful parameters.