added ubuntu 18.04

ubuntu_1804.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+apt-get -y purge apport apport-symptoms bash-completion byobu \
+  htop landscape-common lxcfs lxd lxd-client motd-news-config \
+  nano ntfs-3g os-prober ufw
+apt-get -y autoremove --purge
+apt-get -y clean
+
+mkdir /etc/systemd/system/motd-news.service.d
+cat <<EOF>/etc/systemd/system/motd-news.service.d/override.conf
+[Service]
+ExecStart=/bin/true
+EOF
+
+mkdir /etc/systemd/timesyncd.conf.d
+cat <<EOF>/etc/systemd/timesyncd.conf.d/ntp.conf
+[Time]
+NTP=pool.ntp.org
+EOF
+
+rm /home/ubuntu/.ssh/authorized_keys
+find /var/log -type f | while read f; do echo -ne >$f; done
+rm -rf /var/lib/cloud/* /var/tmp/* /tmp/* /tmp/.*-unix
+exit 0