How to solve the problem when nginx prompts that the port is occupied when starting

Sometimes, some occupied ports may not be closed when stopping. At this time, the port will be reported as occupied when starting.

As shown below:

[root@ZTE_OPLUS_1 nginx-1.12.0]# sh run.sh
===============================================================================
HOME=/oplusapp/PMSCMDB/ums-server/utils/nginx/nginx-1.12.0
_NGINXCMD=/oplusapp/PMSCMDB/ums-server/utils/nginx/nginx-1.12.0/sbin/nginx
===============================================================================
/oplusapp/PMSCMDB/ums-server/utils/nginx/nginx-1.12.0
@WORK_DIR@ /oplusapp/PMSCMDB/ums-server/utils/nginx/nginx-1.12.0
@C_CMD@
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:443 failed (98: Address already in use)
nginx: [emerg] bind() to 0.0.0.0:443 failed (98: Address already in use)
nginx: [emerg] bind() to [::]:443 failed (98: Address already in use)
nginx: [emerg] still could not bind()

The above picture reports that port 443 is occupied: use fuser -n tcp Use the command to view the list of PIDs occupying the port

fuser -n tcp 443

to see what is occupied. You can also use netstat -ntpl to see who is occupying it, and then KILL the occupied PID

[root@ZTE_OPLUS_1 nginx-1.12.0]# fuser -n tcp 443
443/tcp:              2330  2337  2338  2339  2340  2341

Use kill -9 PID to delete the process

[root@ZTE_OPLUS_1 nginx-1.12.0]# kill -9 2330
[root@ZTE_OPLUS_1 nginx-1.12.0]# kill -9 2337
[root@ZTE_OPLUS_1 nginx-1.12.0]# kill -9 2338
[root@ZTE_OPLUS_1 nginx-1.12.0]# kill -9 2339
[root@ZTE_OPLUS_1 nginx-1.12.0]# kill -9 2340

Then start it

[root@ZTE_OPLUS_1 nginx-1.12.0]# sh run.sh
===============================================================================
HOME=/oplusapp/PMSCMDB/ums-server/utils/nginx/nginx-1.12.0
_NGINXCMD=/oplusapp/PMSCMDB/ums-server/utils/nginx/nginx-1.12.0/sbin/nginx
===============================================================================
/oplusapp/PMSCMDB/ums-server/utils/nginx/nginx-1.12.0
@WORK_DIR@ /oplusapp/PMSCMDB/ums-server/utils/nginx/nginx-1.12.0
@C_CMD@

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