SHIFT-WIKI - Sjoerd Hooft's InFormation Technology
This WIKI is my personal documentation blog. Please enjoy it and feel free to reach out through blue sky if you have a question, remark, improvement or observation. See below for the latest additions, or use the search or tags to browse for content.
Bash: Use Full Lines From Inputfile as Matching Pattern
Summary: How to use an inputfile from which the full line is used as a search pattern in other files. The other files all start with SHIFT. The inputfile lines contain whilespaces.
Date: Around 2014
Refactor: 6 April 2025: Checked links and formatting.
inputfile=/tmp/inputfile.txt
nlines=`cat $inputfile | wc -l`
teller=1
while [[ $teller -lt $nlines ]]; do
match=`head -$teller $inputfile | tail -1`
grep "$match" SHIFT* > /dev/null
if [ $? -eq 0 ]; then
echo $match still exists!
fi
teller=$(($teller+1))
done
Explained code:
inputfile=/tmp/inputfile.txt
# Count the number of lines in the inputfile. This is the number of times the loop will be gone through.
nlines=`cat $inputfile | wc -l`
teller=1
while [[ $teller -lt $nlines ]]; do
# Use head and tail to set a variable with a complete line from the inputfile
match=`head -$teller $inputfile | tail -1`
grep "$match" SHIFT* > /dev/null
if [ $? -eq 0 ]; then
echo $match still exists!
fi
teller=$(($teller+1))
done
AIX NIM Client
Summary: ALthough AIX is by now on version 7.3 I find these old pages so fascinating I decided to keep them. On this page I'll show you how to a work with a standalone client to the NIM environment. This page is for AIX 5.3 and AIX 6.1.
Date: Between 2010-2013
Refactor: 21 December 2024: Checked formatting.
Active Directory Certificate Services on Windows Server 2016
Summary: How to setup active directory certificate services on a domain controller.
Date: Around 2017
Refactor: 20 February 2025: Checked links and formatting.
This is a follow up on Active Directory Domain Controller in Azure. My next project is to create a PointToSite VPN towards the same azure environment but that requires certificates. And that brings in Certificate Services. Now remember, installing the Root CA in the same server that is a Domain Controller is not considered best practice. Reasons (among others) are:
- Root CAs are best kept offline for security reasons which is not possible if you install it on a Domain Controller
- You can't demote the Domain Controller without first having to remove the CA
- The more services you host on one system, the more services you have to recover if that server goes down
But there are also benefits. Since you need less servers you pay less for OS, (virtual) hardware and licenses. This is especially a benefit if you are running a lab environment that is limited on budget.
Note that this kind of CA setup is also known as “Enterprise root CA on a Domain Controller online” and is only considered acceptable for lab environments.