How to escape single quote in ARM template

Question

Given the following resource in an AzureRM template, how would one encode the single quote in the commandToExecute part?

{   "type": "Microsoft.Compute/virtualMachines/extensions",   "name": "[concat(variables('vmNameMaster'), copyIndex(), '/sethost')]",   "apiVersion": "2015-06-15",   "location": "[resourceGroup().location]",   "copy": {       "name": "extensionLoopNode",       "count": "[variables('masterCount')]"   },   "dependsOn": [       "[concat('Microsoft.Compute/virtualMachines/', variables('vmNameMaster'), copyIndex(),'/extensions/DockerExtension')]"   ],   "properties": {     "publisher": "Microsoft.OSTCExtensions",     "type": "CustomScriptForLinux",     "typeHandlerVersion": "1.4",     "settings": {       "fileUris": [ ],       "commandToExecute": "[concat('/bin/bash -c \'echo \"export DOCKER_HOST=:2375\" >> /home/', parameters('adminUsername') ,'/.profile\'')]",       "timestamp": 123456789     }   } }, 

Answer 1

You escape Azure ARM functions in the same way as with VB strings: you simply double the single quote characters.

[concat('This is a ''quoted'' word.')] 

outputs

This is a 'quoted' word. 

---

Double quotes still needs to be escaped from JSON.

 [concat('''single'' and \"double\" quotes.')] 

outputs

'single' and "double" quotes.