┌── ln(1) link, ln -- make links
│ ┌── Create a symbolic link.
│ │ ┌── the optional path to the intended symlink
│ │ │ if omitted, symlink is in . named as destination
│ │ │ can use . or ~ or other relative paths
│ │ ┌─────┴────────┐
ln -s /path/to/original /path/to/symlink
└───────┬───────┘
└── the path to the original file/folder
can use . or ~ or other relative paths
$ echo content > original
$ ln -s original symlink
$ ls -la original symlink
-rw-r--r-- 1 grgarside staff 8 28 Jan 18:44 original
lrwxr-xr-x 1 grgarside staff 8 28 Jan 18:44 symlink -> original
$ cat symlink
content
For more information about ln(1) see the man page:
$ man ln
The path to the symlink is optional; if omitted, ln defaults to making a link with the same name as the destination, in the current directory:
$ cd ~/Documents
$ ln -s ../Pictures
$ ls -l Pictures
lrwxr-xr-x 1 user staff 11 Feb 1 17:05 Pictures -> ../Pictures
To create a symlink to replace a system directory (e.g. if you want to have /Users pointing to another disk drive), you need to disable System Integrity Protection. You can re-enable it after the symlink is set up.