FAQ!

#!/bin/bash
SOURCE="${BASH_SOURCE[0]}"
while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
  TARGET="$(readlink "$SOURCE")"
  if [[ $TARGET == /* ]]; then
    SOURCE="$TARGET"
  else
    DIR="$( dirname "$SOURCE" )"
    SOURCE="$DIR/$TARGET" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
  fi
done

SRPATH="$( dirname "$SOURCE" )"
SFPATH="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
if [ "$SFPATH" != "$SRPATH" ]; then
  RDIR=$SRPATH    # relativ path directory
fi

#echo "full path file   $SOURCE"
#echo "full path dir    $SFPATH"
#echo "relativ path dir $SRPATH"

cwdir=$PWD
wdir=$SFPATH
cd $wdir

echo "current working directory,"
echo $cwdir
echo "dir of running program"
echo $wdir

#!/bin/bash

registry_address=hub.swarmlab.io
registry_port=5443
mkdir -p /etc/docker/certs.d/$registry_address:$registry_port
openssl s_client -showcerts -connect $registry_address:$registry_port < /dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /etc/docker/certs.d/$registry_address:$registry_port/ca.crt

registry_port=5480
mkdir -p /etc/docker/certs.d/$registry_address:$registry_port
openssl s_client -showcerts -connect $registry_address:$registry_port < /dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /etc/docker/certs.d/$registry_address:$registry_port/ca.crt

sudo usermod -aG docker $USER