MySQL 5.6 on Ubuntu 16.04

mysql-5.6.sh

#!/bin/bash

# MySQL 5.6 client libraries
# https://launchpad.net/ubuntu/xenial/amd64/libmysqlclient-dev/5.6.28-1ubuntu3
# https://launchpad.net/ubuntu/xenial/amd64/mysql-client-5.6/5.6.28-1ubuntu3
# https://launchpad.net/ubuntu/xenial/amd64/mysql-client-core-5.6/5.6.28-1ubuntu3
# https://launchpad.net/ubuntu/xenial/amd64/mysql-common/5.6.28-1ubuntu3
# https://launchpad.net/ubuntu/xenial/amd64/libmysqlclient18/5.6.28-1ubuntu3
# DEPRECATED https://launchpad.net/ubuntu/xenial/amd64/libdbd-mysql-perl/4.033-1

URLS=$(cat <<'URLS'
http://launchpadlibrarian.net/247512870/libmysqlclient-dev_5.6.28-1ubuntu3_amd64.deb
http://launchpadlibrarian.net/247512887/mysql-client-5.6_5.6.28-1ubuntu3_amd64.deb
http://launchpadlibrarian.net/247512888/mysql-client-core-5.6_5.6.28-1ubuntu3_amd64.deb
http://launchpadlibrarian.net/247512877/mysql-common_5.6.28-1ubuntu3_all.deb
http://launchpadlibrarian.net/247512886/libmysqlclient18_5.6.28-1ubuntu3_amd64.deb
URLS
)

FILENAMES=$(echo "${URLS}" | xargs -I{} basename {} | sed 's@^@/tmp/@')

outputlog() {
  printf '##\n# %s\n##\n' "$(echo "$*" | tr '\n' ' ')"
}

outputlog "Purge MySQL 5.7"
apt-get -y purge $(dpkg -l | grep -E "mysql.*5.7" | awk '$0=$2')
(
  cd /tmp
  outputlog "Download files from urls"
  echo "${URLS}" | xargs -t -P 10 -I{} curl -LORsS {}
  outputlog "Run: apt-get -y --allow-downgrades install ${FILENAMES}"
  apt-get -y --allow-downgrades install ${FILENAMES}
)
outputlog "Run: dpkg -l | grep -i mysql"
dpkg -l | grep -i mysql