3 FAQ tagged "shell scripting"

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UNIX Shell: Find Out Real Path Of File ( Directory )

Q. Some of my programs and scripts needs a real path and not a a symbolic link. How to I determine a real path of any directory under Linux / UNIX operating systems? How do I remove references to /./, /../ and extra ‘/’ character in path?
BASH: Prepend A Text / Lines To a File

Q. I can append text to a file using >> operator but how do I prepend a text to a file? I want the opposit of >> operation?
Shell Scripting: Convert Uppercase to Lowercase
Q. How do I convert uppercase words to lowercase or vise versa under BASH shell? I’ve a small shell script and I’d like to convert all incoming user input to lowercase using a shell script.