구차니의 잡동사니 모음

(setf learned '(VB C++ LISP))

The apostrophe is uses to designate that something in brackets isn't a function (or an S-expression). Basically, if LISP receives something like (VB C++ LISP) it assumes VB is the name of a function and C++ and LISP are its arguments. The apostrophe says that this isn't a function, it's a list, and can itself be an argument in a function.

The form 'foo is simply a faster way to type the special form

(quote foo)

which is to say, "do not evaluate the name foo and replace it with its value; I really mean the name foo".

6.2. I double-clicked on an .exe file, but the system said "The file foo.exe is not marked as executable..."

If the dialog says "Read about the executable bit", with a hyperlink, try clicking on the hyperlink and reading about the executable bit.

If the file is on your hard drive, right-click it, choose Properties / Permissions, and check "Allow executing file as program".

If the file is on a CD-ROM, you can run it from the commandline as described above. Or, if you know how to use 'mount', remount the cd-rom to mark all files as executable with a command like  mount -o remount,mode=0777,exec /media/cdrom but using the real mount point if it's different from /media/cdrom.