????????????????????
????С???????Centos7???????nano??vim??wget??curl??ifconfig??lsof????????????????￡?
????yum -y install nano vim wget curl net-tools lsof
???????????netstat??lsof??????????????Щ???????????????й??
systemctl stop postfix
systemctl stop avahi-daemon
systemctl disable postfix
systemctl disable avahi-daemon
systemctl list-unit-files    ?????????з??????????
systemctl start httpd.service    ???????
systemctl stop  httpd.service    ??????
systemctl restart  httpd.service ???????
systemctl reload   httpd.service ??????????
systemctl disable  httpd.service ?????????
systemctl enable   httpd.service ???????
systemctl status   httpd.service ????????????
systemctl show     httpd.service ?????????????????
systemctl list-dependencies  httpd.service  ?????????????
systemctl is-enabled  httpd.service  ????????????????????
systemctl -H 192.168.117.128 start httpd.service   ???192.168.117.128???????httpd????