Scripts & HOWTOs – @timvkn : Automating Tasks

About & Search

2021-08-25 / About / By Tim van Kooten Niekerk

TIMVKN.NL/TECH hosts a repository of scripts and patterns I have created over the course of time.

My Frequently Used CLI Commands / Admin Tools (QuickRef)	Description
dsa.msc / adsiedit.msc / virtmgmt.msc	Active Directory Users & Computers / ADSI Edit / Hyper-V Manager
start-process powershell -verb runas	Start PowerShell with Elevated Privileges
rundll32 sysdm.cpl,EditEnvironmentVariables	Edit system environment variables
cacls “C:\Path\To\File.TXT” /E /G username@example.com:C	Quick way to add write permission to a filesystem resource
mvn clean package -DskipTests	Mavin compile (Java) code and create local package
mvn test -Dtest=JavaClassTest#specificTest	Run a specific unit test from the command line
java -Djavax.net.debug=ssl:handshake -jar target/packagename-1.0.0-SNAPSHOT.jar	Start package with TLS handshake debugging enabled
oc create secret generic gateway1 –from-file=server.p12	Create an OpenShift secret from the command line
touch -t 202301251415.00 Filename	Force file timestamp to a specific datetime
oc get pods \| grep Evicted \| awk ‘{print $1}’ \| xargs oc delete pod	Delete evicted pods from current OpenShift project

GNU/Linux Bash Check Command Line Parameter

2023-03-27 / GNU/Linux / By Tim van Kooten Niekerk / Leave a Comment

Example script with a check on the number of submitted parameters.

#!/bin/bash

[ $# -ne 1 ] && echo "ERROR: Input Required" && exit 1;

echo $1

GNU/Linux OpenShift Where is My Secret Used?

2023-03-23 / GNU/Linux / By Tim van Kooten Niekerk / Leave a Comment

A simple bash-script for OpenShift to determine which deployment configs make use of a specific secret (within the active project).

#!/bin/bash

oc get dc -o custom-columns="Name:metadata.name,readyReplicas:status.availableReplicas,Volumes:spec.template.spec.volumes,env:spec.template.spec.containers[].env,envFrom:spec.template.spec.containers[].envFrom,Volumes:spec.template.spec.volumes" | grep -E "($1)" | grep -oE "^[a-z0-9-]{3,99}"

$ os-sec-usage.sh secretname

PowerShell Function To Add Filesystem Permissions

2023-03-22 / PowerShell Scripting / By Tim van Kooten Niekerk / Leave a Comment

Recently wrote a simple function to add permission to filesystem resources. It defaults to modify permissions, but can also be another basic permission for instance: Read, Write or FullControl.

function fnAddFilesystemPermissions()
{
  param (
    [string]$sPath,
	[string]$sUserName,
	[string]$sPermission = "Modify"
  )

  # Add write permissions to a file using powershell...
  $accessRule = New-Object System.Security.AccessControl.FileSystemAccessRule($sUserName,$sPermission,"Allow")
  $acl = Get-ACL -Path $sPath
  $acl.SetAccessRule($accessRule)
  $acl | Set-Acl -Path $sPath

  # Return permissions...
  return (Get-ACL -Path $sPath).Access | Format-Table 
}

PS> fnAddFilesystemPermissions -sPath “C:\Path\To\Resource” -sUserName “User-Principle-Name” [-sPermission “FullControl“]

[Other] Start DevOps Tools From Command line

2023-03-21 / Other / By Tim van Kooten Niekerk / Leave a Comment

Some commands I regularly use to start tools from the command line when I need them to start with elevated privileges.

My Frequently Used CLI Commands / Admin Tools (QuickRef)	Description
dsa.msc / adsiedit.msc / virtmgmt.msc	Active Directory Users & Computers / ADSI Edit / Hyper-V Manager
start-process powershell -verb runas	Start PowerShell with Elevated Privileges
rundll32 sysdm.cpl,EditEnvironmentVariables	Edit system environment variables
cacls “C:\Path\To\File.TXT” /E /G username@example.com:C	Quick way to add write permission to a filesystem resource
mvn clean package -DskipTests	Mavin compile (Java) code and create local package
mvn test -Dtest=JavaClassTest#specificTest	Run a specific unit test from the command line
java -Djavax.net.debug=ssl:handshake -jar target/packagename-1.0.0-SNAPSHOT.jar	Start package with TLS handshake debugging enabled
oc create secret generic gateway1 –from-file=server.p12	Create an OpenShift secret from the command line
touch -t 202301251415.00 Filename	Force file timestamp to a specific datetime
oc get pods \| grep Evicted \| awk ‘{print $1}’ \| xargs oc delete pod	Delete evicted pods from current OpenShift project