AWSにsshログインした時にスライムを出現するようにしてみた。 ref: https://qiita.com/tu-kun/items/d38452161bfb9da54bcd

file0.txt

[ec2-user@ip-172-000-11-222 ~]$ sudo su  # rootユーザにスイッチ
[root@ip-172-000-11-222 ec2-user]# cat /etc/motd

       __|  __|_  )
       _|  (     /   Amazon Linux AMI
      ___|\___|___|

https://aws.amazon.com/amazon-linux-ami/2018.03-release-notes/
13 package(s) needed for security, out of 23 available
Run "sudo yum update" to apply all updates.

file1.txt

[root@ip-172-000-11-222 ec2-user]# cat /etc/update-motd.d/30-banner 
#!/bin/sh
version=$(rpm -q --qf '%{version}' system-release)
cat << EOF

       __|  __|_  )
       _|  (     /   Amazon Linux AMI
      ___|\___|___|

https://aws.amazon.com/amazon-linux-ami/$version-release-notes/
EOF

file2.txt

[root@ip-172-000-11-222 ec2-user]# cat /etc/update-motd.d/30-banner 
#!/bin/sh
version=$(rpm -q --qf '%{version}' system-release)
curl -s "https://gist.githubusercontent.com/makocchi-git/9775443/raw/02e67ad144bd9ab5b71472e46e9a553d49f413d4/slime.txt" # 調達したスライムのURLを設定する。
cat << EOF
https://aws.amazon.com/amazon-linux-ami/$version-release-notes/
EOF

file3.txt

[root@ip-172-000-11-222 ec2-user]# /bin/bash /etc/update-motd.d/30-banner

file4.txt

[root@ip-172-000-11-222 ec2-user]# update-motd