[root@node1 ~]# npm run start &
[1] 58104
[root@node1 ~]# npm ERR! path /root/package.json
npm ERR! code ENOENT
npm ERR! errno -2
npm ERR! syscall open
npm ERR! enoent ENOENT: no such file or directory, open '/root/package.json'
npm ERR! enoent This is related to npm not being able to find a file.
npm ERR! enoent 

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2020-09-14T13_51_52_203Z-debug.log

[1]+  退出 254              npm run start

[root@node1 ~]# cat /root/.npm/_logs/2020-09-14T13_46_01_150Z-debug.log
0 info it worked if it ends with ok
1 verbose cli [ '/usr/local/bin/node', '/usr/local/bin/npm', 'run', 'start' ]
2 info using npm@5.3.0
3 info using node@v8.2.1
4 verbose config Skipping project config: /root/.npmrc. (matches userconfig)
5 verbose stack Error: ENOENT: no such file or directory, open '/root/package.json'
6 verbose cwd /root
7 verbose Linux 3.10.0-957.el7.x86_64
8 verbose argv "/usr/local/bin/node" "/usr/local/bin/npm" "run" "start"
9 verbose node v8.2.1
10 verbose npm  v5.3.0
11 error path /root/package.json
12 error code ENOENT
13 error errno -2
14 error syscall open
15 error enoent ENOENT: no such file or directory, open '/root/package.json'
16 error enoent This is related to npm not being able to find a file.
17 verbose exit [ -2, true ]

[root@node1 src]# cd elasticsearch-head/   '回到安装nodejs文件下 进行重新初始化'
[root@node1 elasticsearch-head]# npm install
npm WARN deprecated fsevents@1.2.13: fsevents 1 will break on node v14+ and could be using insecure binaries. Upgrade to fsevents 2.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules/karma/node_modules/chokidar/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.13: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm WARN elasticsearch-head@0.0.0 license should be a valid SPDX license expression

[root@node1 elasticsearch-head]#  npm run start &
[1] 58150
[root@node1 elasticsearch-head]# 
> elasticsearch-head@0.0.0 start /usr/local/src/elasticsearch-head
> grunt server

Running "connect:server" (connect) task
Waiting forever...
Started connect web server on http://localhost:9100

[root@node1 elasticsearch-head]# netstat -ntap | grep 9100
tcp        0      0 0.0.0.0:9100            0.0.0.0:*               LISTEN      58160/grunt