Bash 4 - a rough overview - 4.2 is available since... long

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http://wiki.bash-hackers.org – :V4: Beside many bugfixes since Bash 3.2, Bash 4 will bring some interesting new features for shell scripters and shell users. See also Bash changes for a small general overview with more details. Not all of the changes and news are written down here, just the biggest or most interesting ones. Also the changes to completion and the readline component are not mentioned. Though, if you're familiar with these parts of Bash (and Bash 4), feel free to write a chapter here. (HowTos)