vi
ext4
File attributes are not specifically used to run Perl scripts (ie. you can run them without setting or changing them).
There are no similarities. Fedora (or any other Linux distribution for that matter) doesn't really care about file extensions; they aren't used by most programs, and are not required to identify file types.
ls -al list hidden file also.Hidden files starting with "."
dnf install ncurses-devel
File extensions can be changed just by renaming the file. For instance, mv filename.txt filename.doc
chmod +x is the command to set the executable flag in Linux but, Linux does not use exe files.
Right-click the file and select Properties
Write to the file, append to the file, and read or change its attributes.
The primary file system for Fedora 12 is ext4 but you may also use ext3.
On an ordinary text file this cannot be done via any OS or terminal, as the file cannot store such attributes. On other files, this depends on the software used to edit the file.