# pwsh > PowerShell Core is a cross-platform automation and configuration tool/framework. > More information: . - Start an instance of PowerShell: `pwsh` - Execute a script and then exit: `pwsh -File {{path/to/file.ps1}}` - Set the execution policy for the current session: `pwsh -ExecutionPolicy {{AllSigned|Bypass|Default|RemoteSigned|Restricted|Undefined|Unrestricted}}` - Execute a command and then exit: `pwsh -Command {{command}}`