kekru

• Open a webpage that uses the CA with Firefox
• Click the lock-icon in the addressbar -> show information -> show certificate
• the certificate viewer will open
• click details and choose the certificate of the certificate-chain, you want to import to CentOS
• click "Export..." and save it as .crt file
• Copy the .crt file to /etc/pki/ca-trust/source/anchors on your CentOS machine
• run update-ca-trust extract
• test it with wget https://thewebsite.org

kekru

Windows CMD Utilities

Search for string in files:

FINDSTR /spin "the string" *
Searches for "the string" in the files of the current and all subdirectories.

kekru

Simple FTP based backup of a zip file

This script creates a zipfile and uploads it to an FTP server. You can define how many backups should be stored on the server. Older files will be deleted.

kekru

FROM openjdk:8-jre
RUN echo "Europe/Berlin" > /etc/timezone && dpkg-reconfigure -f noninteractive tzdata
RUN mkdir /data
WORKDIR /data
ADD myapp.jar /data/myapp.jar

ENV springprofiles="" \
    MAXRAMIFNOLIMIT=4096

ENTRYPOINT MAXRAM=$(expr `cat /sys/fs/cgroup/memory/memory.limit_in_bytes` / 1024 / 1024) && \

kekru

Postgres DB with point in time recovery with pitrery

Not yet tested

Usage

This image is based on docker's official postgres image. See here for usage information.
Remove or replace the timezone settings in this Dockerfile with your timezone. Currently "Europe/Berlin" is set.
The pitrery backup directory is /backup.

kekru

Enable Docker Remote API with TLS client verification

Docker's Remote API can be secured via TLS and client certificate verification.
First of all you need a few certificates and keys:

• CA certificate
• Server certificate
• Server key
• Client certificate
• Client key

Create certificate files

kekru

#!/bin/bash
set -e
DIR=~/install-docker-client-temp

mkdir -v --parents $DIR
#https://get.docker.com/builds/Linux/i386/docker-latest.tgz | tar xvz --directory $DIR
curl https://download.docker.com/linux/static/edge/x86_64/docker-17.11.0-ce.tgz | tar xvz --directory $DIR
mv -v $DIR/docker/docker /usr/local/bin/docker
chmod +x /usr/local/bin/docker

kekru

Using Windows Subsystem for Linux combined with Docker for Windows

Docker CE for Windows

• Install Docker CE for Windows
• Go to Docker for Windows Settings -> General and enable Expose daemon on tcp://localhost:2375 without TLS.
  This will enable the Docker remote API for requests, coming from localhost, not from another computer in your network. A TLS secured version is not yet supported in Docker for Windows. See docker/for-win#453 for more information. I also tried a daemon.json file with options tlscacert, tlscert, tlskey and tlsverify, but Docker for Windows crashed on booting.

Install Windows Subsystem for Linux (WSL)

• Enable Developer Mode as described in Enable your device for development
• Install WSL by running the following in Powershell as Administrator: `E

kekru

My low cost keyboard does not have a less/greater/pipe key....
So I mapped a special key, to the less/greater/pipe key

# find out the keycode of the special key, for me it was 148
xev
# set Strg_r to Mode_switch -> Strg_r + special key will print pipe
sudo xmodmap -e "keycode 0x69 = Mode_switch Mode_switch Mode_switch Mode_switch" 
# set key binding for special key. Replace the keycode with your keycode  
sudo xmodmap -e "keycode 148 = less greater bar"

kekru

/////////// changes for pom.xml
    <dependency>
    	<groupId>org.powermock</groupId>
    	<artifactId>powermock-api-mockito</artifactId>
    	<version>1.6.2</version>
    </dependency>
    <dependency>
    	<groupId>org.powermock</groupId>
    	<artifactId>powermock-module-junit4</artifactId>
    	<version>1.6.2</version>