解决启动PHP报错：ERROR: unable to bind listening socket for address ‘127.0.0.1:9000‘: Address already i

netstat -antup|grep php-fpm

# netstat -antup|grep 9000
tcp        0      0 127.0.0.1:9000          0.0.0.0:*               LISTEN      17845/php-fpm: mast 

kill php-fpm并启动

如果是多版本 php-fpm 变通一下， kill pid，然后启动对应的php-fpm

# systemctl enable php-fpm 
# kaillall php-fpm
# systemctl start php-fpm