我做到了

ps aux | grep PHP-fpm

我有

root      1543  0.0  0.7 444672  7552 ?        Ss   Nov10   2:14 PHP-fpm: master process (/etc/PHP/5.6/fpm/PHP-fpm.conf)
forge     1587  0.0  4.3 687152 43728 ?        S    Nov10   9:47 PHP-fpm: pool www
forge     3443  0.0  2.8 458504 28784 ?        S    Nov10   9:44 PHP-fpm: pool www
root      3569  0.0  0.0  14520   932 pts/0    S+   21:36   0:00 grep --color=auto PHP-fpm
forge    26548  0.0  2.5 451148 25884 ?        S    Nov21   0:26 PHP-fpm: pool www

然后,当我尝试

sudo服务PHP-fpm重启

PHP-fpm: unrecognized service.

我该如何预防呢？