I get this error every time I make folder, user and group

simplify the name

' seems to get parsed out anywhere and is not a legal part of a filename
: will give you trouble with Windows users

I use books in my shares and every thing works as expected here

Quote from DHGE

simplify the name

' seems to get parsed out anywhere and is not a legal part of a filename
: will give you trouble with Windows users

I use books in my shares and every thing works as expected here

An apostrophe is a legal filename character, but it has to be properly escaped if using it in any shell command. The requirement to escape the character makes it awkward and many scripts and programs have not been properly written to handle characters that must be escaped.