環境こんな感じ。vagrant の centos/7 です。 % uname -a Linux localhost.localdomain 3.10.0-693.11.6.el7.x86_64 #1 SMP Thu Jan 4 01:06:37 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux % cat /etc/redhat-release CentOS Linux release 7.4.1708 (Core) C…