I get the arguments to `ln -s` round the wrong way at least half the time. This simple script makes this relatively common operation easy to get right.

symlink

#!/usr/bin/env python

import subprocess
import sys


args = sys.argv[1:]

if args in (['-h'], ['--help'], []):
    print '''
Usage: symlink path/to/symlink to path/to/existing

  -h, --help        display this help message
  -v, --version     display the version number
'''
    sys.exit()

if args in (['-v'], ['--version']):
    print '0.1.0'
    sys.exit()

try:
    new, direction, existing = args
except ValueError:
    print 'invalid arguments (`symlink --help` provides usage instructions)'
    sys.exit()

if direction != 'to':
    print 'invalid arguments (`symlink --help` provides usage instructions)'
    sys.exit()

subprocess.call(('ln', '-s', existing, new))

Installation

curl -s https://raw.github.com/gist/2932794/symlink > symlink &&
chmod 755 symlink &&
mv symlink /usr/local/bin