How does awk delete blank lines

Editor to share with you how to delete awk blank lines, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Cat / etc/default/docker

# Here in Debian, this file is sourced by:

#-/ etc/init.d/docker (sysvinit)

#-/ etc/init/docker (upstart)

#-systemd's docker.service

# Use of this file for configuring your Docker daemon is discouraged.

# The recommended alternative is "/ etc/docker/daemon.json", as described in:

# https://docs.docker.com/v1.11/engine/reference/commandline/daemon/#daemon-configuration-file

DOCKER_OPTS= "- bip=172.17.2.1/24-ip-masq=false-mtu=1450"

# If that does not suit your needs, try a systemd drop-in file, as described in:

# https://docs.docker.com/v1.11/engine/admin/systemd/#custom-docker-daemon-options

Awk'! / # / {if ($0,000= ") print}'/ etc/default/docker

DOCKER_OPTS= "- bip=172.17.2.1/24-ip-masq=false-mtu=1450"

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