osx - Does any one how to execute this cmd through shell script? -

does 1 know how execute below cmd through shell script?

#!/bin/sh  username="xyz"  defaultcmd=`defaults write com.apple.xcode pbxcustomtemplatemacrodefinitions "{ \"username\" = \"${username}\" ;}" ` 

where write com.apple.xcode .plist file. above command works on terminal.

@shelter right - above command run without '...' , should not captured value in script. 1 thing need noted script should not run "root" user otherwise command have no effect.

defaults write com.apple.xcode pbxcustomtemplatemacrodefinitions "{ \"username\" = \"${username}\" ;}"