Help with symlinks

[octopus]

Hello

I'm trying do make some symlinks, and I get link working when testing link in directory,/mnt/rt-ac68u/jffs, with winscp.
Somehow link don't get excuted. Goal is to make links from FTP, mnt/rt-ac68u/jffs to /jffs

ln -s [TARGET DIRECTORY OR FILE] ./[SHORTCUT]
ln -s "$(realpath Data)" ~/Data

Location: /mnt/rt-ac68u/jffs
Links to: /jffs

Octopus

 

[octopus]

I'm trying with: make a symlink with the absolute path of the directory
but I get Permission denied. /jffs is 0755 and /mnt/rt-ac68u/jffs/ is 0755

knhaddock@KNHADDOCK:/# ln -s "$(/mnt/rt-ac68u/jffs)" /jffs
-sh: /mnt/rt-ac68u/jffs: Permission denied

Little help PLS.....

 

[RMerlin]

When creating a symlink, the source must not already exist - ln creates it.