如何在端口80上运行node.js应用程序？进程阻塞了我的端口吗？

我相信远程实例上的端口80被阻止，并且我尝试使用端口80运行node.js应用程序。我已经尝试了端口3000和3002，并且两个端口都工作正常，但是运行时出现错误在端口80上。我怀疑端口80从netstat -an下面的输出中被阻止，但是如何找到阻止端口80在下面的地址的进程ID？

[lucas@ecoinstance]~/node/nodetest1$ netstat -an
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        0      0 127.0.0.1:27017         0.0.0.0:*               LISTEN     
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN     
tcp        0      0 0.0.0.0:3002            0.0.0.0:*               LISTEN     
tcp        0      0 127.0.0.1:27017         127.0.0.1:51108         ESTABLISHED
tcp        0      0 127.0.0.1:51106         127.0.0.1:27017         ESTABLISHED
tcp        0      0 127.0.0.1:27017         127.0.0.1:51106         ESTABLISHED
tcp        0      0 127.0.0.1:51107         127.0.0.1:27017         ESTABLISHED
tcp        0      0 10.240.241.116:3002     174.61.171.61:36583     TIME_WAIT  
tcp        0      0 127.0.0.1:27017         127.0.0.1:51109         ESTABLISHED
tcp        0      0 10.240.241.116:42423    169.254.169.254:80      ESTABLISHED
tcp        0      0 127.0.0.1:51108         127.0.0.1:27017         ESTABLISHED
tcp        0    532 10.240.241.116:22       174.61.171.61:56824     ESTABLISHED
tcp        0      0 127.0.0.1:27017         127.0.0.1:51107         ESTABLISHED
tcp        0      0 10.240.241.116:42412    169.254.169.254:80      ESTABLISHED
tcp        0      0 127.0.0.1:51109         127.0.0.1:27017         ESTABLISHED
tcp        0      0 127.0.0.1:51105         127.0.0.1:27017         ESTABLISHED
tcp        0      0 10.240.241.116:42422    169.254.169.254:80      TIME_WAIT  
tcp        0      0 127.0.0.1:27017         127.0.0.1:51105         ESTABLISHED
tcp6       0      0 :::22                   :::*                    LISTEN     
udp        0      0 0.0.0.0:49948           0.0.0.0:*                          
udp        0      0 0.0.0.0:68              0.0.0.0:*                          
udp        0      0 10.240.241.116:123      0.0.0.0:*                          
udp        0      0 127.0.0.1:123           0.0.0.0:*                          
udp        0      0 0.0.0.0:123             0.0.0.0:*                          
udp6       0      0 :::12151                :::*                               
udp6       0      0 :::123                  :::*                               
Active UNIX domain sockets (servers and established)
Proto RefCnt Flags       Type       State         I-Node   Path
unix  2      [ ACC ]     STREAM     LISTENING     405680   /tmp/ssh-KdkxJfFLpKTC/agent.22
813
unix  2      [ ACC ]     STREAM     LISTENING     408230   /tmp/ssh-ofUeNNEwAqtP/agent.22
243
unix  2      [ ACC ]     STREAM     LISTENING     416227   /tmp/mongodb-27017.sock
unix  2      [ ACC ]     SEQPACKET  LISTENING     3692     /run/udev/control
unix  7      [ ]         DGRAM                    5286     /dev/log
unix  2      [ ACC ]     STREAM     LISTENING     5318     /var/run/acpid.socket
unix  2      [ ACC ]     STREAM     LISTENING     16170    /tmp//tmux-1000/default
unix  2      [ ACC ]     STREAM     LISTENING     414450   /var/run/dbus/system_bus_socke

这是尝试使用node.js在端口80上运行时的日志：

[lucas@ecoinstance]~/node/nodetest1$ npm start

> nodetest1@0.0.1 start /home/lucas/node/nodetest1
> node ./bin/www


events.js:72
        throw er; // Unhandled 'error' event
              ^
Error: listen EACCES
    at errnoException (net.js:904:11)
    at Server._listen2 (net.js:1023:19)
    at listen (net.js:1064:10)
    at Server.listen (net.js:1138:5)
    at Function.app.listen (/home/lucas/node/nodetest1/node_modules/express/lib/applicati
on.js:532:24)                                                                           
    at Object.<anonymous> (/home/lucas/node/nodetest1/bin/www:7:18)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)

npm ERR! nodetest1@0.0.1 start: `node ./bin/www`
npm ERR! Exit status 8
npm ERR! 
npm ERR! Failed at the nodetest1@0.0.1 start script.
npm ERR! This is most likely a problem with the nodetest1 package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node ./bin/www
npm ERR! You can get their info via:
npm ERR!     npm owner ls nodetest1
npm ERR! There is likely additional logging output above.
npm ERR! System Linux 3.13-0.bpo.1-amd64
npm ERR! command "/usr/local/bin/node" "/usr/local/bin/npm" "start"
npm ERR! cwd /home/lucas/node/nodetest1
npm ERR! node -v v0.10.28
npm ERR! npm -v 1.4.9
npm ERR! code ELIFECYCLE
npm ERR! 
npm ERR! Additional logging details can be found in:
npm ERR!     /home/lucas/node/nodetest1/npm-debug.log
npm ERR! not ok code 0

并且sudo netstat -lnp不返回任何匹配的端口80：

[lucas@ecoinstance]~/node/nodetest1$ sudo netstat -lnp                           [48/648]
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Progr
am name
tcp        0      0 127.0.0.1:27017         0.0.0.0:*               LISTEN      29160/mon
god    
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      1976/sshd

tcp6       0      0 :::22                   :::*                    LISTEN      1976/sshd

udp        0      0 0.0.0.0:49948           0.0.0.0:*                           1604/dhcl
ient   
udp        0      0 0.0.0.0:68              0.0.0.0:*                           1604/dhcl
ient   
udp        0      0 10.240.241.116:123      0.0.0.0:*                           2076/ntpd

udp        0      0 127.0.0.1:123           0.0.0.0:*                           2076/ntpd

udp        0      0 0.0.0.0:123             0.0.0.0:*                           2076/ntpd

udp6       0      0 :::12151                :::*                                1604/dhcl
ient   
udp6       0      0 :::123                  :::*                                2076/ntpd

Active UNIX domain sockets (only servers)
Proto RefCnt Flags       Type       State         I-Node   PID/Program name    Path
unix  2      [ ACC ]     STREAM     LISTENING     405680   22814/ssh-agent     /tmp/ssh-K
dkxJfFLpKTC/agent.22813
unix  2      [ ACC ]     STREAM     LISTENING     408230   24049/ssh-agent     /tmp/ssh-o
fUeNNEwAqtP/agent.22243
unix  2      [ ACC ]     STREAM     LISTENING     416227   29160/mongod        /tmp/mongo
db-27017.sock
unix  2      [ ACC ]     SEQPACKET  LISTENING     3692     284/udevd           /run/udev/
control
unix  2      [ ACC ]     STREAM     LISTENING     5318     1798/acpid          /var/run/a
cpid.socket
unix  2      [ ACC ]     STREAM     LISTENING     16170    5177/tmux           /tmp//tmux
-1000/default
unix  2      [ ACC ]     STREAM     LISTENING     414450   28213/dbus-daemon   /var/run/d
bus/system_bus_socket
unix  2      [ ACC ]     STREAM     LISTENING     404225   22324/1             /tmp/ssh-9
TlDmu4bjl/agent.22324

您试图以非root用户身份启动节点。Linux默认情况下仅允许root绑定到端口1024或更低。

如果要以该用户身份运行它，则可能需要查看/programming/413807/is-there-a-way-for-non-root-processes-to-bind-to- l特权端口1024

netstat -lnp以root身份尝试或lsof -n -i :80

最简单，最好的答案恕我直言：

• sudo apt-get install libcap2-bin
• sudo setcap cap_net_bind_service=+ep /usr/local/bin/node
• da！这使您的节点应用程序可以在端口80上运行而不会抱怨。

我为什么喜欢它？因为：

• 您不必使用apache或nginx
• 您不必以超级用户身份运行应用程序
• 您不必转发端口（每次计算机启动时都可以处理）

参考链接：https : //www.digitalocean.com/community/tutorials/how-to-use-pm2-to-setup-a-node-js-production-environment-on-an-ubuntu-vps（一篇很棒的文章有关如何在云托管上设置节点应用程序的信息）。

我试图使用运行服务器node server.js。它并没有出现任何错误。也，

lsof -t -i:80

没有列出任何过程。

问题是我试图以非特权用户身份进行绑定。当我尝试时，它成功了：

sudo node server.js

如此简单，但是有时您可能会忘记它，并且当您的计算机上运行着多个服务器（例如apache，nginx等）时，您将开始在其他服务器进程之后运行。（就像我一样）。希望这对某人有帮助！！！