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this is not a problem related to shell script , this a problem on how to restart or use pm2 commands from spawn process in nodejs from a remote server. running the pm2 commands solo or in a shell script directly on the server , it works fine , but when i use spawn i get the error below.

how to restart pm2, using spawn process , using ssh root@ip

i've tried this 

ssh root@ip 'pm2 restart all'

but when i try this on my local pc directly from my terminal it works , but when i try to run it in exces or spawn process , i get this error bash: pm2: command not found failed with code 127

i also tried , putting my commands in script.sh and send it with this command from spawn 

scp /root/script.sh root@${ip}:/root&&ssh root@${ip} bash script.sh

i get the same error. but if i run alone in terminal it works , is the error in environment variable , it's not loaded correctly when i run it in spawn prcess.

sasha romanov
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    Possible duplicate of [How to use SSH to run a shell script on a remote machine?](https://stackoverflow.com/questions/305035/how-to-use-ssh-to-run-a-shell-script-on-a-remote-machine) – O. Jones Jun 02 '19 at 12:12
  • @O.Jones this is not a problem in running sell script on another machine , please read the question very carefully , i asked that the problem in spawn process , not in sell script , because i already run it using script.sh and terminal directly , but when i run it with spawn process , the problem occurs – sasha romanov Jun 02 '19 at 12:20
  • What happens if you use `ssh root@ip` to get a shell on the remote machine, and then issue the command `pm2 restart all` ? I bet it doesn't work. I bet `pm2` can't be found in the `PATH` available to the root user on the remote machine. I *know* running `pm2` from root is a bad choice for security reasons. – O. Jones Jun 02 '19 at 12:26
  • @O.Jones i don't want to make a user with root privileges , my question was a problem in spawn process , do i need to load en variables when i run the spawn ? or where is the problem exactly , this is vps server and when i log in i use pm2 command and it works , so why it didn't work when i used only spawn all other commands works just fine, so please tell me exactly what's the error . or how to solve ? – sasha romanov Jun 02 '19 at 13:09

1 Answers1

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ssh -t root@ip "export PATH='path/to/pm2'; pm2 restart all"

You should include the pathname to pm2 even if it is the current directory (eg ./pm2 or /path/to/pm2) to ensure it is found, or else export PATH=.... before the call to pm2.

Vishnudev
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  • it didn't work i get this error `Pseudo-terminal will not be allocated because stdin is not a terminal.` and bash pm2 command not found also the same error as before and when i use -tt i get connection close – sasha romanov Jun 02 '19 at 11:24
  • The exact same command works for me. I use it every day. Could you check your network firewall setting or the server has to be accessed using a different method involving a `pem` file maybe? @sasharomanov – Vishnudev Jun 02 '19 at 11:35
  • Did you try using some other user than root? – Vishnudev Jun 02 '19 at 11:38
  • can you explain more about pem file or firewall settings , i'm using ssh command – sasha romanov Jun 02 '19 at 11:44
  • `.pem` file is a security certificate used to gain access to servers(public key). If you use public-private key protection then you need this file to login to the server. – Vishnudev Jun 02 '19 at 11:47
  • Your firewall manager must have port 22 open for ssh. Then remote access will work. – Vishnudev Jun 02 '19 at 11:49
  • @sasharomanov Take a look at [ENABLE ROOT LOGIN OVER SSH](https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/v2v_guide/preparation_before_the_p2v_migration-enable_root_login_over_ssh) – Vishnudev Jun 02 '19 at 11:51
  • yes firewall is configured correctly as , i can run other commands directly from server even nodejs files , but pm2 can't run , i don't really know why – sasha romanov Jun 02 '19 at 11:52
  • what does `whereis pm2` give? – Vishnudev Jun 02 '19 at 11:52
  • Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/194331/discussion-between-vishnudev-and-sasha-romanov). – Vishnudev Jun 02 '19 at 11:53