$ cat /etc/issue
  Ubuntu 14.04.4 LTS
$ nginx -v
  nginx version: nginx/1.4.6 (Ubuntu)

$ cat /etc/issue
Ubuntu 16.04.3 LTS

$ nginx -v
nginx version: nginx/1.10.3 (Ubuntu)

$ cat /etc/issue
  Ubuntu 14.04.5 LTS

$ nginx -v
  nginx version: nginx/1.4.6 (Ubuntu)
  
$ apachectl -V
  Server version: Apache/2.4.7 (Ubuntu)

$ cat /etc/issue
  Ubuntu 14.04.5 LTS \n \l

$ php -v
  PHP 5.6.33-1+ubuntu14.04.1+deb.sury.org+1 (cli) 

$ nginx -v
  nginx version: nginx/1.4.6 (Ubuntu)

$ cat /etc/issue
  Ubuntu 14.04.4 LTS
$ nginx -v
  nginx version: nginx/1.10.3 (Ubuntu)

$ cat /etc/issue
  Ubuntu 14.04.5 LTS

$ nginx -v
  nginx version: nginx/1.4.6 (Ubuntu)

$ apachectl -v
  Server version: Apache/2.4.7 (Ubuntu)

$ cat /etc/issue
  Ubuntu 14.04.5 LTS

$ nginx -v
  nginx version: nginx/1.4.6 (Ubuntu)

$ apachectl -v
  Server version: Apache/2.4.7 (Ubuntu)

$ cat /etc/issue
  Ubuntu 14.04.5 LTS
    
$ php -v
  PHP 5.6.32-1+ubuntu14.04.1+deb.sury.org+2 (cli)