我的 Debian Sid 安装已init监听:::80并且无法nginx启动。
root@server01:~# systemctl status nginx.service
* nginx.service - A high performance web server and a reverse proxy server
Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Sat 2015-11-07 11:06:01 GMT; 16s ago
Process: 9506 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=1/FAILURE)
Process: 9501 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
Nov 07 11:05:59 server01 nginx[9506]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Nov 07 11:05:59 server01 nginx[9506]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Nov 07 11:06:00 server01 nginx[9506]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Nov 07 11:06:00 server01 nginx[9506]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Nov 07 11:06:01 server01 nginx[9506]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Nov 07 11:06:01 server01 nginx[9506]: nginx: [emerg] still could not bind()
Nov 07 11:06:01 server01 systemd[1]: nginx.service: Control process exited, code=exited status=1
Nov 07 11:06:01 server01 systemd[1]: Failed to start A high performance web server and a reverse proxy server.
Nov 07 11:06:01 server01 systemd[1]: nginx.service: Unit entered failed state.
Nov 07 11:06:01 server01 systemd[1]: nginx.service: Failed with result 'exit-code'.
netstat输出
root@server01:~#netstat -tulpn
tcp 0 0 0.0.0.0:44443 0.0.0.0:* LISTEN 2878/pulseaudio
tcp 0 0 0.0.0.0:4713 0.0.0.0:* LISTEN 2878/pulseaudio
tcp 0 0 0.0.0.0:31021 0.0.0.0:* LISTEN 10395/x2goclient
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 1170/rpcbind
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1015/sshd
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 16155/cupsd
tcp 0 0 0.0.0.0:23 0.0.0.0:* LISTEN 939/inetd
tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN 1212/postgres
tcp 0 0 0.0.0.0:31001 0.0.0.0:* LISTEN 14223/x2goclient
tcp6 0 0 :::36157 :::* LISTEN 2878/pulseaudio
tcp6 0 0 :::4713 :::* LISTEN 2878/pulseaudio
tcp6 0 0 :::111 :::* LISTEN 1170/rpcbind
tcp6 0 0 :::80 :::* LISTEN 1/init
tcp6 0 0 :::22 :::* LISTEN 1015/sshd
tcp6 0 0 ::1:631 :::* LISTEN 16155/cupsd
tcp6 0 0 ::1:5432 :::* LISTEN 1212/postgres
systemctl -all list-sockets
LISTEN UNIT ACTIVATES
/dev/rfkill systemd-rfkill.socket systemd-rfkill.service
/run/acpid.socket acpid.socket acpid.service
/run/dmeventd-client dm-event.socket dm-event.service
/run/dmeventd-server dm-event.socket dm-event.service
/run/lvm/lvmetad.socket lvm2-lvmetad.socket lvm2-lvmetad.service
/run/lvm/lvmpolld.socket lvm2-lvmpolld.socket lvm2-lvmpolld.service
/run/systemd/fsck.progress systemd-fsckd.socket systemd-fsckd.service
/run/systemd/initctl/fifo systemd-initctl.socket systemd-initctl.service
/run/systemd/journal/dev-log systemd-journald-dev-log.socket systemd-journald.service
/run/systemd/journal/socket systemd-journald.socket systemd-journald.service
/run/systemd/journal/stdout systemd-journald.socket systemd-journald.service
/run/systemd/journal/syslog syslog.socket rsyslog.service
/run/udev/control systemd-udevd-control.socket systemd-udevd.service
/var/run/acpi_fakekey acpi-fakekey.socket acpi-fakekey.service
/var/run/avahi-daemon/socket avahi-daemon.socket avahi-daemon.service
/var/run/cups/cups.sock cups.socket cups.service
/var/run/dbus/system_bus_socket dbus.socket dbus.service
[::]:80 pywwetha.socket pywwetha.service
audit 1 systemd-journald-audit.socket systemd-journald.service
kobject-uevent 1 systemd-udevd-kernel.socket systemd-udevd.service
^[[0;1;39m20 sockets listed.
curl command
root@server01:~#
root@server01:~# curl localhost
curl: (56) Recv failure: Connection reset by peer
root@server01:~# curl 0.0.0.0:80
curl: (7) Failed to connect to 0.0.0.0 port 80: Connection refused
root@server01:~# curl 127.0.0.1:80
curl: (7) Failed to connect to 127.0.0.1 port 80: Connection refused
root@server01:~# curl :::80
curl: (7) Failed to connect to :: port 80: Connection refused
root@server01:~#
答案1
根据您的附加输出，pywwetha 似乎正在侦听端口 80。
停止它：
systemctl stop pywwetha.service
然后使用以下命令禁用它：
systemctl disable pywwetha.service
然后尝试启动 nginx。