- Learning the Korn Shell, 2nd Edition – O’Reilly Media (They don’t offer it as an e-book. What a pity.)
- kornshell.com
- http://kornshell.com/doc/
- KornShell 88 Manual Page [Link] (-> get a git clone as described here and improve the links etc.; are their true man page sources?)
- KornShell 93 Manual Page [Link]
Q: The ksh on “your” AIX – is it ksh88 or ksh93?
A: Well … the ksh on “my” AIX knows the “whence” builtin without “-a”, so I think it’s a ksh88, because ksh93 would know “whence -a”.
(This paragraph will go to another article on ksh. (TBD))