diff --git a/src/Modules/Shared/PowerShellGet/PSGet.Resource.psd1 b/src/Modules/Shared/PowerShellGet/PSGet.Resource.psd1
index 6dfd08222a..5fc17b600e 100644
Binary files a/src/Modules/Shared/PowerShellGet/PSGet.Resource.psd1 and b/src/Modules/Shared/PowerShellGet/PSGet.Resource.psd1 differ
diff --git a/src/Modules/Shared/PowerShellGet/PSModule.psm1 b/src/Modules/Shared/PowerShellGet/PSModule.psm1
index 6f53550ef0..5d1804eb6e 100644
--- a/src/Modules/Shared/PowerShellGet/PSModule.psm1
+++ b/src/Modules/Shared/PowerShellGet/PSModule.psm1
@@ -14,25 +14,43 @@ Microsoft.PowerShell.Core\Set-StrictMode -Version Latest
 # Check if this is nano server. [System.Runtime.Loader.AssemblyLoadContext] is only available on NanoServer
 $script:isNanoServer = $null -ne ('System.Runtime.Loader.AssemblyLoadContext' -as [Type])
 
-try
+function IsWindows { $PSVariable = Get-Variable -Name IsWindows -ErrorAction Ignore; return (-not $PSVariable -or $PSVariable.Value) }
+function IsLinux { $PSVariable = Get-Variable -Name IsLinux -ErrorAction Ignore; return ($PSVariable -and $PSVariable.Value) }
+function IsCore { $PSVariable = Get-Variable -Name IsCore -ErrorAction Ignore; return ($PSVariable -and $PSVariable.Value) }
+
+if(IsWindows)
 {
-    $script:MyDocumentsFolderPath = [Environment]::GetFolderPath("MyDocuments")
+    $script:ProgramFilesPSPath = Microsoft.PowerShell.Management\Join-Path -Path $env:ProgramFiles -ChildPath "WindowsPowerShell"
 }
-catch
+else
 {
-    $script:MyDocumentsFolderPath = $null
+    $script:ProgramFilesPSPath = $PSHome
 }
 
-$script:ProgramFilesPSPath = Microsoft.PowerShell.Management\Join-Path -Path $env:ProgramFiles -ChildPath "WindowsPowerShell"
+if(IsWindows)
+{
+    try
+    {
+        $script:MyDocumentsFolderPath = [Environment]::GetFolderPath("MyDocuments")
+    }
+    catch
+    {
+        $script:MyDocumentsFolderPath = $null
+    }
 
-$script:MyDocumentsPSPath = if($script:MyDocumentsFolderPath)
-                            {
-                                Microsoft.PowerShell.Management\Join-Path -Path $script:MyDocumentsFolderPath -ChildPath "WindowsPowerShell"
-                            } 
-                            else
-                            {
-                                Microsoft.PowerShell.Management\Join-Path -Path $env:USERPROFILE -ChildPath "Documents\WindowsPowerShell"
-                            }
+    $script:MyDocumentsPSPath = if($script:MyDocumentsFolderPath)
+                                {
+                                    Microsoft.PowerShell.Management\Join-Path -Path $script:MyDocumentsFolderPath -ChildPath "WindowsPowerShell"
+                                } 
+                                else
+                                {
+                                    Microsoft.PowerShell.Management\Join-Path -Path $env:USERPROFILE -ChildPath "Documents\WindowsPowerShell"
+                                }
+}
+else
+{
+    $script:MyDocumentsPSPath = Microsoft.PowerShell.Management\Join-Path -Path $HOME -ChildPath ".local/share/powershell"
+}
 
 $script:ProgramFilesModulesPath = Microsoft.PowerShell.Management\Join-Path -Path $script:ProgramFilesPSPath -ChildPath "Modules"
 $script:MyDocumentsModulesPath = Microsoft.PowerShell.Management\Join-Path -Path $script:MyDocumentsPSPath -ChildPath "Modules"
@@ -41,10 +59,20 @@ $script:ProgramFilesScriptsPath = Microsoft.PowerShell.Management\Join-Path -Pat
 
 $script:MyDocumentsScriptsPath = Microsoft.PowerShell.Management\Join-Path -Path $script:MyDocumentsPSPath -ChildPath "Scripts"
 
-$script:TempPath = ([System.IO.DirectoryInfo]$env:TEMP).FullName
+$script:TempPath = if(IsWindows){ ([System.IO.DirectoryInfo]$env:TEMP).FullName } else { '/tmp' }
 $script:PSGetItemInfoFileName = "PSGetModuleInfo.xml"
-$script:PSGetProgramDataPath = Microsoft.PowerShell.Management\Join-Path -Path $env:ProgramData -ChildPath 'Microsoft\Windows\PowerShell\PowerShellGet\'
-$script:PSGetAppLocalPath = Microsoft.PowerShell.Management\Join-Path -Path $env:LOCALAPPDATA -ChildPath 'Microsoft\Windows\PowerShell\PowerShellGet\'
+
+if(IsWindows)
+{
+    $script:PSGetProgramDataPath = Microsoft.PowerShell.Management\Join-Path -Path $env:ProgramData -ChildPath 'Microsoft\Windows\PowerShell\PowerShellGet\'
+    $script:PSGetAppLocalPath = Microsoft.PowerShell.Management\Join-Path -Path $env:LOCALAPPDATA -ChildPath 'Microsoft\Windows\PowerShell\PowerShellGet\'
+}
+else
+{
+    $script:PSGetProgramDataPath = "$HOME/.config/powershell/powershellget" #TODO: Get $env:ProgramData equivalent
+    $script:PSGetAppLocalPath = "$HOME/.config/powershell/powershellget"
+}
+
 $script:PSGetModuleSourcesFilePath = Microsoft.PowerShell.Management\Join-Path -Path $script:PSGetAppLocalPath -ChildPath "PSRepositories.xml"
 $script:PSGetModuleSources = $null
 $script:PSGetInstalledModules = $null
@@ -89,8 +117,8 @@ $script:NuGetProviderVersion  = [Version]'2.8.5.201'
 
 $script:SupportsPSModulesFeatureName="supports-powershell-modules"
 $script:FastPackRefHastable = @{}
-$script:NuGetBinaryProgramDataPath="$env:ProgramFiles\PackageManagement\ProviderAssemblies"
-$script:NuGetBinaryLocalAppDataPath="$env:LOCALAPPDATA\PackageManagement\ProviderAssemblies"
+$script:NuGetBinaryProgramDataPath=if(IsWindows) {"$env:ProgramFiles\PackageManagement\ProviderAssemblies"}
+$script:NuGetBinaryLocalAppDataPath=if(IsWindows) {"$env:LOCALAPPDATA\PackageManagement\ProviderAssemblies"}
 # go fwlink for 'https://nuget.org/nuget.exe'
 $script:NuGetClientSourceURL = 'http://go.microsoft.com/fwlink/?LinkID=690216&clcid=0x409'
 $script:NuGetExeName = 'NuGet.exe'
@@ -577,7 +605,7 @@ catch
     # Ignore the error and try adding the type below
 }
 
-if(-not $script:TelemetryEnabled)
+if(-not $script:TelemetryEnabled -and (IsWindows))
 {
     try
     {
@@ -682,7 +710,7 @@ function Publish-Module
 
     Begin
     {
-        if($script:isNanoServer) {
+        if($script:isNanoServer -or (IsCore)) {
             $message = $LocalizedData.PublishPSArtifactUnsupportedOnNano -f "Module"
             ThrowError -ExceptionName "System.InvalidOperationException" `
                         -ExceptionMessage $message `
@@ -844,7 +872,7 @@ function Publish-Module
         }
         else
         {
-            $resolvedPath = Resolve-PathHelper -Path $Path -CallerPSCmdlet $PSCmdlet | Microsoft.PowerShell.Utility\Select-Object -First 1
+            $resolvedPath = Resolve-PathHelper -Path $Path -CallerPSCmdlet $PSCmdlet | Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
 
             if(-not $resolvedPath -or 
                -not (Microsoft.PowerShell.Management\Test-Path -Path $resolvedPath -PathType Container))
@@ -1034,7 +1062,7 @@ function Publish-Module
             # Use Find-Script to check if that name is already used as scriptname
             $scriptPSGetItemInfo = Find-Script @FindParameters | 
                                         Microsoft.PowerShell.Core\Where-Object {$_.Name -eq $moduleName} | 
-                                            Microsoft.PowerShell.Utility\Select-Object -Last 1
+                                            Microsoft.PowerShell.Utility\Select-Object -Last 1 -ErrorAction Ignore
             if($scriptPSGetItemInfo)
             {
                 $message = $LocalizedData.SpecifiedNameIsAlearyUsed -f ($moduleName, $Repository, 'Find-Script')
@@ -1049,7 +1077,7 @@ function Publish-Module
             $null = $FindParameters.Remove('Tag')
             $currentPSGetItemInfo = Find-Module @FindParameters | 
                                         Microsoft.PowerShell.Core\Where-Object {$_.Name -eq $moduleInfo.Name} | 
-                                            Microsoft.PowerShell.Utility\Select-Object -Last 1
+                                            Microsoft.PowerShell.Utility\Select-Object -Last 1 -ErrorAction Ignore
 
             if($currentPSGetItemInfo)
             {
@@ -1387,7 +1415,7 @@ function Save-Module
         {
             if($Path)
             {
-                $destinationPath = Resolve-PathHelper -Path $Path -CallerPSCmdlet $PSCmdlet | Microsoft.PowerShell.Utility\Select-Object -First 1
+                $destinationPath = Resolve-PathHelper -Path $Path -CallerPSCmdlet $PSCmdlet | Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
 
                 if(-not $destinationPath -or -not (Microsoft.PowerShell.Management\Test-path $destinationPath))
                 {
@@ -1404,7 +1432,7 @@ function Save-Module
             }
             else
             {
-                $destinationPath = Resolve-PathHelper -Path $LiteralPath -IsLiteralPath -CallerPSCmdlet $PSCmdlet | Microsoft.PowerShell.Utility\Select-Object -First 1
+                $destinationPath = Resolve-PathHelper -Path $LiteralPath -IsLiteralPath -CallerPSCmdlet $PSCmdlet | Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
 
                 if(-not $destinationPath -or -not (Microsoft.PowerShell.Management\Test-Path -LiteralPath $destinationPath))
                 {
@@ -1808,10 +1836,6 @@ function Update-Module
         [PSCredential]
         $ProxyCredential,
 
-        [Parameter()]
-        [switch]
-        $SkipPublisherCheck,
-
         [Parameter()]
         [Switch]
         $Force
@@ -1857,7 +1881,7 @@ function Update-Module
                 
                 if(-not $installedPackages -and -not (Test-WildcardPattern -Name $moduleName))
                 {
-                    $availableModules = Get-Module -ListAvailable $moduleName -Verbose:$false | Microsoft.PowerShell.Utility\Select-Object -Unique
+                    $availableModules = Get-Module -ListAvailable $moduleName -Verbose:$false | Microsoft.PowerShell.Utility\Select-Object -Unique -ErrorAction Ignore
 
                     if(-not $availableModules)
                     {                    
@@ -2485,7 +2509,7 @@ function Publish-Script
 
     Begin
     {
-        if($script:isNanoServer) {
+        if($script:isNanoServer -or (IsCore)) {
             $message = $LocalizedData.PublishPSArtifactUnsupportedOnNano -f "Script"
             ThrowError -ExceptionName "System.InvalidOperationException" `
                         -ExceptionMessage $message `
@@ -2506,7 +2530,7 @@ function Publish-Script
         if($Path)
         {
             $scriptFilePath = Resolve-PathHelper -Path $Path -CallerPSCmdlet $PSCmdlet | 
-                                  Microsoft.PowerShell.Utility\Select-Object -First 1
+                                  Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
             
             if(-not $scriptFilePath -or 
                -not (Microsoft.PowerShell.Management\Test-Path -Path $scriptFilePath -PathType Leaf))
@@ -2523,7 +2547,7 @@ function Publish-Script
         else
         {
             $scriptFilePath = Resolve-PathHelper -Path $LiteralPath -IsLiteralPath -CallerPSCmdlet $PSCmdlet | 
-                                  Microsoft.PowerShell.Utility\Select-Object -First 1
+                                  Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
 
             if(-not $scriptFilePath -or 
                -not (Microsoft.PowerShell.Management\Test-Path -LiteralPath $scriptFilePath -PathType Leaf))
@@ -2677,7 +2701,7 @@ function Publish-Script
             # Use Find-Module to check if that name is already used as module name
             $modulePSGetItemInfo = Find-Module @FindParameters | 
                                         Microsoft.PowerShell.Core\Where-Object {$_.Name -eq $scriptName} | 
-                                            Microsoft.PowerShell.Utility\Select-Object -Last 1
+                                            Microsoft.PowerShell.Utility\Select-Object -Last 1 -ErrorAction Ignore
             if($modulePSGetItemInfo)
             {
                 $message = $LocalizedData.SpecifiedNameIsAlearyUsed -f ($scriptName, $Repository, 'Find-Module')
@@ -2694,7 +2718,7 @@ function Publish-Script
             $currentPSGetItemInfo = $null
             $currentPSGetItemInfo = Find-Script @FindParameters | 
                                         Microsoft.PowerShell.Core\Where-Object {$_.Name -eq $scriptName} | 
-                                            Microsoft.PowerShell.Utility\Select-Object -Last 1
+                                            Microsoft.PowerShell.Utility\Select-Object -Last 1 -ErrorAction Ignore
 
             if($currentPSGetItemInfo)
             {
@@ -3053,7 +3077,7 @@ function Save-Script
             if($Path)
             {
                 $destinationPath = Resolve-PathHelper -Path $Path -CallerPSCmdlet $PSCmdlet | 
-                                       Microsoft.PowerShell.Utility\Select-Object -First 1
+                                       Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
 
                 if(-not $destinationPath -or -not (Microsoft.PowerShell.Management\Test-path $destinationPath))
                 {
@@ -3071,7 +3095,7 @@ function Save-Script
             else
             {
                 $destinationPath = Resolve-PathHelper -Path $LiteralPath -IsLiteralPath -CallerPSCmdlet $PSCmdlet | 
-                                       Microsoft.PowerShell.Utility\Select-Object -First 1
+                                       Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
 
                 if(-not $destinationPath -or -not (Microsoft.PowerShell.Management\Test-Path -LiteralPath $destinationPath))
                 {
@@ -4438,7 +4462,7 @@ function Test-ScriptFileInfo
         $scriptFilePath = $null
         if($Path)
         {
-            $scriptFilePath = Resolve-PathHelper -Path $Path -CallerPSCmdlet $PSCmdlet | Microsoft.PowerShell.Utility\Select-Object -First 1
+            $scriptFilePath = Resolve-PathHelper -Path $Path -CallerPSCmdlet $PSCmdlet | Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
             
             if(-not $scriptFilePath -or -not (Microsoft.PowerShell.Management\Test-Path -Path $scriptFilePath -PathType Leaf))
             {
@@ -4454,7 +4478,7 @@ function Test-ScriptFileInfo
         }
         else
         {
-            $scriptFilePath = Resolve-PathHelper -Path $LiteralPath -IsLiteralPath -CallerPSCmdlet $PSCmdlet | Microsoft.PowerShell.Utility\Select-Object -First 1
+            $scriptFilePath = Resolve-PathHelper -Path $LiteralPath -IsLiteralPath -CallerPSCmdlet $PSCmdlet | Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
 
             if(-not $scriptFilePath -or -not (Microsoft.PowerShell.Management\Test-Path -LiteralPath $scriptFilePath -PathType Leaf))
             {
@@ -4511,7 +4535,7 @@ function Test-ScriptFileInfo
 
             $psscriptInfoComments = $CommentTokens | 
                                         Microsoft.PowerShell.Core\Where-Object { $_.Extent.Text -match "<#PSScriptInfo" } | 
-                                            Microsoft.PowerShell.Utility\Select-Object -First 1
+                                            Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
 
             if(-not $psscriptInfoComments)
             {
@@ -4700,20 +4724,20 @@ function Test-ScriptFileInfo
 
             if($allCommands)
             {
-                $allCommandNames = $allCommands | ForEach-Object {$_.Name} | Select-Object -Unique
+                $allCommandNames = $allCommands | ForEach-Object {$_.Name} | Select-Object -Unique -ErrorAction Ignore
                 ValidateAndAdd-PSScriptInfoEntry -PSScriptInfo $PSScriptInfo `
                                                  -PropertyName $script:DefinedCommands `
                                                  -PropertyValue $allCommandNames `
                                                  -CallerPSCmdlet $PSCmdlet            
 
-                $allFunctionNames = $allCommands | Where-Object {-not $_.IsWorkflow}  | ForEach-Object {$_.Name} | Select-Object -Unique
+                $allFunctionNames = $allCommands | Where-Object {-not $_.IsWorkflow}  | ForEach-Object {$_.Name} | Select-Object -Unique -ErrorAction Ignore
                 ValidateAndAdd-PSScriptInfoEntry -PSScriptInfo $PSScriptInfo `
                                                  -PropertyName $script:DefinedFunctions `
                                                  -PropertyValue $allFunctionNames `
                                                  -CallerPSCmdlet $PSCmdlet
 
 
-                $allWorkflowNames = $allCommands | Where-Object {$_.IsWorkflow} | ForEach-Object {$_.Name} | Select-Object -Unique 
+                $allWorkflowNames = $allCommands | Where-Object {$_.IsWorkflow} | ForEach-Object {$_.Name} | Select-Object -Unique -ErrorAction Ignore
                 ValidateAndAdd-PSScriptInfoEntry -PSScriptInfo $PSScriptInfo `
                                                  -PropertyName $script:DefinedWorkflows `
                                                  -PropertyValue $allWorkflowNames `
@@ -4942,7 +4966,7 @@ function New-ScriptFileInfo
         $ScriptMetadataString += $ScriptCommentHelpInfoString        
         $ScriptMetadataString += "Param()`r`n`r`n"
 
-        $tempScriptFilePath = Microsoft.PowerShell.Management\Join-Path -Path $env:TEMP -ChildPath "$(Get-Random).ps1"
+        $tempScriptFilePath = Microsoft.PowerShell.Management\Join-Path -Path $script:TempPath -ChildPath "$(Get-Random).ps1"
         
         try
         {
@@ -5089,7 +5113,7 @@ function Update-ScriptFileInfo
         if($Path)
         {
             $scriptFilePath = Resolve-PathHelper -Path $Path -CallerPSCmdlet $PSCmdlet | 
-                                  Microsoft.PowerShell.Utility\Select-Object -First 1
+                                  Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
             
             if(-not $scriptFilePath -or 
                -not (Microsoft.PowerShell.Management\Test-Path -Path $scriptFilePath -PathType Leaf))
@@ -5106,7 +5130,7 @@ function Update-ScriptFileInfo
         else
         {
             $scriptFilePath = Resolve-PathHelper -Path $LiteralPath -IsLiteralPath -CallerPSCmdlet $PSCmdlet | 
-                                  Microsoft.PowerShell.Utility\Select-Object -First 1
+                                  Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
 
             if(-not $scriptFilePath -or 
                -not (Microsoft.PowerShell.Management\Test-Path -LiteralPath $scriptFilePath -PathType Leaf))
@@ -5303,7 +5327,7 @@ function Update-ScriptFileInfo
             return
         }
         
-        $tempScriptFilePath = Microsoft.PowerShell.Management\Join-Path -Path $env:TEMP -ChildPath "$(Get-Random).ps1"
+        $tempScriptFilePath = Microsoft.PowerShell.Management\Join-Path -Path $script:TempPath -ChildPath "$(Get-Random).ps1"
         
         try
         {
@@ -5359,7 +5383,7 @@ function Update-ScriptFileInfo
 
                 $psscriptInfoComments = $CommentTokens | 
                                             Microsoft.PowerShell.Core\Where-Object { $_.Extent.Text -match "<#PSScriptInfo" } | 
-                                                Microsoft.PowerShell.Utility\Select-Object -First 1
+                                                Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
 
                 if(-not $psscriptInfoComments)
                 {
@@ -6129,7 +6153,7 @@ function Ping-Endpoint
     $results = @{}
 
     $WebProxy = $null
-    if($Proxy)
+    if($Proxy -and (IsWindows))
     {
         $ProxyNetworkCredential = $null
         if($ProxyCredential)
@@ -6359,6 +6383,11 @@ function ValidateAndSet-PATHVariableIfUserAccepts
         $Request
     )
 
+    if(-not (IsWindows))
+    {
+        return
+    }
+
     Set-PSGetSettingsVariable
 
     # Check and add the scope path to PATH environment variable if USER accepts the prompt.
@@ -7154,9 +7183,10 @@ function Install-NuGetClientBinaries
         $Force
     )
 
-    if($script:NuGetProvider -and 
-       (-not $BootstrapNuGetExe -or 
-        ($script:NuGetExePath -and (Microsoft.PowerShell.Management\Test-Path -Path $script:NuGetExePath))))
+    if(-not (IsWindows) -or
+       ($script:NuGetProvider -and 
+        (-not $BootstrapNuGetExe -or 
+        ($script:NuGetExePath -and (Microsoft.PowerShell.Management\Test-Path -Path $script:NuGetExePath)))))
     {
         return
     }
@@ -7240,7 +7270,7 @@ function Install-NuGetClientBinaries
                                 $_.Path -and 
                                 ((Microsoft.PowerShell.Management\Split-Path -Path $_.Path -Leaf) -eq $script:NuGetExeName) -and
                                 (-not $_.Path.StartsWith($env:windir, [System.StringComparison]::OrdinalIgnoreCase)) 
-                            } | Microsoft.PowerShell.Utility\Select-Object -First 1
+                            } | Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
 
             if($nugetCmd -and $nugetCmd.Path)
             {
@@ -7256,7 +7286,7 @@ function Install-NuGetClientBinaries
     }
     
     # On Nano server we don't need NuGet.exe
-    if(-not $bootstrapNuGetProvider -and ($script:isNanoServer -or -not $BootstrapNuGetExe))
+    if(-not $bootstrapNuGetProvider -and ($script:isNanoServer -or (IsCore) -or -not $BootstrapNuGetExe))
     {
         return
     }
@@ -7313,7 +7343,7 @@ function Install-NuGetClientBinaries
             }
         }
 
-        if($BootstrapNuGetExe -and -not $script:isNanoServer)
+        if($BootstrapNuGetExe -and -not $script:isNanoServer -and -not (IsCore))
         {
             Write-Verbose -Message $LocalizedData.DownloadingNugetExe
 
@@ -7397,10 +7427,19 @@ function Test-RunningAsElevated
     [OutputType([bool])]
     Param()
 
-    $wid=[System.Security.Principal.WindowsIdentity]::GetCurrent()
-    $prp=new-object System.Security.Principal.WindowsPrincipal($wid)
-    $adm=[System.Security.Principal.WindowsBuiltInRole]::Administrator
-    return $prp.IsInRole($adm)
+    if(IsWindows)
+    {
+        $wid=[System.Security.Principal.WindowsIdentity]::GetCurrent()
+        $prp=new-object System.Security.Principal.WindowsPrincipal($wid)
+        $adm=[System.Security.Principal.WindowsBuiltInRole]::Administrator
+        return $prp.IsInRole($adm)
+    }
+    elseif(IsLinux)
+    {
+        return ($env:SUDO_UID -eq '1000')
+    }
+
+    return $false
 }
 
 function Get-EscapedString
@@ -7486,7 +7525,7 @@ function ValidateAndGet-ScriptDependencies
 
             $psgetItemInfo = Find-Module @FindModuleArguments  | 
                                         Microsoft.PowerShell.Core\Where-Object {$_.Name -eq $ModuleName} | 
-                                            Microsoft.PowerShell.Utility\Select-Object -Last 1
+                                            Microsoft.PowerShell.Utility\Select-Object -Last 1 -ErrorAction Ignore
 
             if(-not $psgetItemInfo)
             {
@@ -7529,7 +7568,7 @@ function ValidateAndGet-ScriptDependencies
 
             $psgetItemInfo = Find-Script @FindScriptArguments  | 
                                         Microsoft.PowerShell.Core\Where-Object {$_.Name -eq $requiredScript} | 
-                                            Microsoft.PowerShell.Utility\Select-Object -Last 1
+                                            Microsoft.PowerShell.Utility\Select-Object -Last 1 -ErrorAction Ignore
 
             if(-not $psgetItemInfo)
             {
@@ -7656,7 +7695,7 @@ function ValidateAndGet-RequiredModuleDetails
 
             $psgetItemInfo = Find-Module @FindModuleArguments  | 
                                         Microsoft.PowerShell.Core\Where-Object {$_.Name -eq $ModuleName} | 
-                                            Microsoft.PowerShell.Utility\Select-Object -Last 1
+                                            Microsoft.PowerShell.Utility\Select-Object -Last 1 -ErrorAction Ignore
 
             if(-not $psgetItemInfo)
             {
@@ -7700,7 +7739,7 @@ function ValidateAndGet-RequiredModuleDetails
 
             $psgetItemInfo = Find-Module @FindModuleArguments  | 
                                         Microsoft.PowerShell.Core\Where-Object {$_.Name -eq $ModuleName} | 
-                                            Microsoft.PowerShell.Utility\Select-Object -Last 1
+                                            Microsoft.PowerShell.Utility\Select-Object -Last 1 -ErrorAction Ignore
 
             if(-not $psgetItemInfo)
             {
@@ -9482,7 +9521,7 @@ function Find-Package
 
     if($options.ContainsKey($script:Tag))
     {
-        $userSpecifiedTags = $options[$script:Tag] | Microsoft.PowerShell.Utility\Select-Object -Unique        
+        $userSpecifiedTags = $options[$script:Tag] | Microsoft.PowerShell.Utility\Select-Object -Unique -ErrorAction Ignore
     }
     else
     {
@@ -9493,7 +9532,7 @@ function Find-Package
     if($options.ContainsKey('DscResource'))
     {
         $specifiedDscResources = $options['DscResource'] | 
-                                    Microsoft.PowerShell.Utility\Select-Object -Unique | 
+                                    Microsoft.PowerShell.Utility\Select-Object -Unique -ErrorAction Ignore | 
                                         Microsoft.PowerShell.Core\ForEach-Object {"$($script:DscResource)_$_"}
     }
 
@@ -9501,7 +9540,7 @@ function Find-Package
     if($options.ContainsKey('RoleCapability'))
     {
         $specifiedRoleCapabilities = $options['RoleCapability'] | 
-                                        Microsoft.PowerShell.Utility\Select-Object -Unique | 
+                                        Microsoft.PowerShell.Utility\Select-Object -Unique -ErrorAction Ignore | 
                                             Microsoft.PowerShell.Core\ForEach-Object {"$($script:RoleCapability)_$_"}
     }
 
@@ -9509,7 +9548,7 @@ function Find-Package
     if($options.ContainsKey('Command'))
     {
         $specifiedCommands = $options['Command'] | 
-                                Microsoft.PowerShell.Utility\Select-Object -Unique |
+                                Microsoft.PowerShell.Utility\Select-Object -Unique -ErrorAction Ignore |
                                     Microsoft.PowerShell.Core\ForEach-Object {"$($script:Command)_$_"}
     }
 
@@ -9517,7 +9556,7 @@ function Find-Package
     if($options.ContainsKey('Includes'))
     {
         $includes = $options['Includes'] | 
-                        Microsoft.PowerShell.Utility\Select-Object -Unique | 
+                        Microsoft.PowerShell.Utility\Select-Object -Unique -ErrorAction Ignore | 
                             Microsoft.PowerShell.Core\ForEach-Object {"$($script:Includes)_$_"}
         
         # Add PSIncludes_DscResource to $specifiedIncludes iff -DscResource names are not specified
@@ -10432,7 +10471,7 @@ function Install-PackageUtility
                                                }
                 }
                 
-                $InstalledItemsList | Select-Object -Unique
+                $InstalledItemsList | Select-Object -Unique -ErrorAction Ignore
 
                 if($Debug)
                 {
@@ -10518,11 +10557,11 @@ function Install-PackageUtility
                         $InstalledItemDetails = $null
                         if($packageType -eq $script:PSArtifactTypeModule)
                         {
-                            $InstalledItemDetails = Get-InstalledModuleDetails -Name $pkg.Name | Select-Object -Last 1
+                            $InstalledItemDetails = Get-InstalledModuleDetails -Name $pkg.Name | Select-Object -Last 1 -ErrorAction Ignore
                         }
                         elseif($packageType -eq $script:PSArtifactTypeScript)
                         {
-                            $InstalledItemDetails = Get-InstalledScriptDetails -Name $pkg.Name | Select-Object -Last 1
+                            $InstalledItemDetails = Get-InstalledScriptDetails -Name $pkg.Name | Select-Object -Last 1 -ErrorAction Ignore
                         }
 
                         if($InstalledItemDetails -and 
@@ -10947,7 +10986,7 @@ function Uninstall-Package
 
             if(-not $Force -and $dependentModules)
             {
-                $message = $LocalizedData.UnableToUninstallAsOtherModulesNeedThisModule -f ($moduleName, $version, $moduleBase, $(($dependentModules.Name | Select-Object -Unique) -join ','), $moduleName)
+                $message = $LocalizedData.UnableToUninstallAsOtherModulesNeedThisModule -f ($moduleName, $version, $moduleBase, $(($dependentModules.Name | Select-Object -Unique -ErrorAction Ignore) -join ','), $moduleName)
 
                 ThrowError -ExceptionName "System.InvalidOperationException" `
                            -ExceptionMessage $message `
@@ -11093,7 +11132,7 @@ function Uninstall-Package
                                ($scriptName, 
                                 $version, 
                                 $scriptBase, 
-                                $(($dependentScriptNames | Select-Object -Unique) -join ','), 
+                                $(($dependentScriptNames | Select-Object -Unique -ErrorAction Ignore) -join ','), 
                                 $scriptName)
 
                 ThrowError -ExceptionName 'System.InvalidOperationException' `
@@ -11638,11 +11677,20 @@ function Set-InstalledModulesVariable
     foreach ($location in $modulePaths)
     {
         # find all modules installed using PowerShellGet
-        $moduleBases = Get-ChildItem $location -Recurse `
-                                    -Attributes Hidden -Filter $script:PSGetItemInfoFileName `
-                                    -ErrorAction SilentlyContinue `
-                                    -WarningAction SilentlyContinue `
-                                    | Foreach-Object { $_.Directory }        
+        $GetChildItemParams = @{
+            Path = $location
+            Recurse = $true
+            Filter = $script:PSGetItemInfoFileName
+            ErrorAction = 'SilentlyContinue'
+            WarningAction = 'SilentlyContinue'
+        }
+
+        if(IsWindows)
+        {
+            $GetChildItemParams['Attributes'] = 'Hidden'
+        }
+
+        $moduleBases = Get-ChildItem @GetChildItemParams | Foreach-Object { $_.Directory }
 
         
         foreach ($moduleBase in $moduleBases)
@@ -12170,7 +12218,7 @@ function Test-ModuleInstalled
     # Check if module is already installed
     $availableModule = Microsoft.PowerShell.Core\Get-Module -ListAvailable -Name $Name -Verbose:$false | 
                            Microsoft.PowerShell.Core\Where-Object {-not (Test-ModuleSxSVersionSupport) -or -not $RequiredVersion -or ($RequiredVersion -eq $_.Version)} | 
-                               Microsoft.PowerShell.Utility\Select-Object -Unique
+                               Microsoft.PowerShell.Utility\Select-Object -Unique -ErrorAction Ignore
 
     return $availableModule
 }
@@ -12231,7 +12279,7 @@ function Test-ScriptInstalled
 
     $scriptInfo = $scriptInfos | Microsoft.PowerShell.Core\Where-Object {
                                                                 (-not $RequiredVersion) -or ($RequiredVersion -eq $_.Version)
-                                                            } | Microsoft.PowerShell.Utility\Select-Object -First 1
+                                                            } | Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
 
     return $scriptInfo
 }
@@ -13638,6 +13686,10 @@ function Validate-ModuleAuthenticodeSignature
         [string]
         $InstallLocation,
 
+        [Parameter()]
+        [Switch]
+        $IsUpdateOperation,
+
         [Parameter()]
         [Switch]
         $SkipPublisherCheck
@@ -13652,21 +13704,13 @@ function Validate-ModuleAuthenticodeSignature
     }
 
     # Skip the publisher check when -SkipPublisherCheck is specified and 
-    # previously-installed module is not signed by Microsoft
-    if($SkipPublisherCheck)
+    # it is not an update operation.
+    if(-not $IsUpdateOperation -and $SkipPublisherCheck)
     {
-        if($InstalledModuleDetails -and $InstalledModuleDetails.IsMicrosoftCertificate)
-        {
-            $Message = $LocalizedData.ProceedingWithPublisherCheckForMicrosoftModules -f ($CurrentModuleInfo.Name)
-            Write-Verbose -Message $message            
-        }
-        else
-        {
-            $Message = $LocalizedData.SkippingPublisherCheck -f ($CurrentModuleInfo.Version, $CurrentModuleInfo.Name)
-            Write-Verbose -Message $message
+        $Message = $LocalizedData.SkippingPublisherCheck -f ($CurrentModuleInfo.Version, $CurrentModuleInfo.Name)
+        Write-Verbose -Message $message
 
-            return $true
-        }
+        return $true
     }
 
     # Validate the catalog signature for the current module being installed.
@@ -13744,7 +13788,7 @@ function Validate-ModuleAuthenticodeSignature
                 }
                 else
                 {
-                    $Message = $LocalizedData.PublishersMismatch -f ($CurrentModuleAuthenticodePublisher, $CurrentModuleInfo.Name, $CurrentModuleInfo.Version, $InstalledModuleAuthenticodePublisher, $InstalledModuleInfo.Name, $InstalledModuleVersion)
+                    $Message = $LocalizedData.PublishersMismatch -f ($InstalledModuleInfo.Name, $InstalledModuleVersion, $CurrentModuleInfo.Name, $CurrentModuleAuthenticodePublisher, $CurrentModuleInfo.Version)
                     ThrowError -ExceptionName 'System.InvalidOperationException' `
                                -ExceptionMessage $message `
                                -ErrorId 'PublishersMismatch' `
@@ -13828,7 +13872,7 @@ function Validate-ModuleCommandAlreadyAvailable
                                                                       -WarningAction SilentlyContinue | 
                                     Microsoft.PowerShell.Core\Where-Object { ($CommandNames -contains $_.Name) -and 
                                                                              ($_.Source -ne $CurrentModuleInfo.Name) } |
-                                        Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction SilentlyContinue
+                                        Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
             if($AvailableCommand)
             {
                 $message = $LocalizedData.ModuleCommandAlreadyAvailable -f ($AvailableCommand.Name, $CurrentModuleInfo.Name)
@@ -14003,11 +14047,11 @@ function Get-InstalledModuleAuthenticodeSignature
 
     $SourceModule = $AvailableModules | Microsoft.PowerShell.Core\Where-Object {
                                             $_.ModuleBase.StartsWith($InstallLocation, [System.StringComparison]::OrdinalIgnoreCase) 
-                                        } | Microsoft.PowerShell.Utility\Select-Object -First 1
+                                        } | Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
 
     if(-not $SourceModule)
     {
-        $SourceModule = $AvailableModules | Microsoft.PowerShell.Utility\Select-Object -First 1
+        $SourceModule = $AvailableModules | Microsoft.PowerShell.Utility\Select-Object -First 1 -ErrorAction Ignore
     }
     else
     {
@@ -14130,10 +14174,11 @@ function Test-ValidManifestModule
                        -CallerPSCmdlet $PSCmdlet `
                        -ErrorCategory InvalidOperation
         }
-        else
+        elseif(IsWindows)
         {
             $ValidationResult = Validate-ModuleAuthenticodeSignature -CurrentModuleInfo $PSModuleInfo `
                                                                      -InstallLocation $InstallLocation `
+                                                                     -IsUpdateOperation:$IsUpdateOperation `
                                                                      -SkipPublisherCheck:$SkipPublisherCheck
 
             if($ValidationResult)