DSC for Linux nxFileLine Resource

The nxFileLine resource in PowerShell Desired State Configuration (DSC) provides a mechanism to manage lines within a configuration file on a Linux node.

Syntax

nxFileLine <string> #ResourceName
{
    FilePath = <string>
    ContainsLine = <string>
    [ DoesNotContainPattern = <string> ]
    [ DependsOn = <string[]> ]
}

Properties

Property	Description
FilePath	The full path to the file to manage lines in on the target node.
ContainsLine	A line to ensure exists in the file. This line will be appended to the file if it does not exist in the file. ContainsLine is mandatory, but can be set to an empty string (ContainsLine = "") if it is not needed.
DoesNotContainPattern	A regular expression pattern for lines that should not exist in the file. For any lines that exist in the file that match this regular expression, the line will be removed from the file.

Common properties

Property	Description
DependsOn	Indicates that the configuration of another resource must run before this resource is configured. For example, if the ID of the resource configuration script block that you want to run first is ResourceName and its type is ResourceType, the syntax for using this property is DependsOn = "[ResourceType]ResourceName".

Example

This example demonstrates using the nxFileLine resource to configure the /etc/sudoers file, ensuring that the user: monuser is configured to not requiretty.

Import-DSCResource -ModuleName nx

nxFileLine DoNotRequireTTY
{
   FilePath = "/etc/sudoers"
   ContainsLine = 'Defaults:monuser !requiretty'
   DoesNotContainPattern = "Defaults:monuser[ ]+requiretty"
}