Esxi 4.1 can not restart management services

Today I noticed that the vSphere client to one of our Esxi 4.1 servers would not log in.  So I SSH'd in and tried to restart the management services per this article:

However, both approaches are not working and produce the following errors:

[root@vm3 log]# service vmware-vpxa restart
vmware-vpxa: unrecognized service

[root@vm3 log]# /etc/init.d/hostd restart
-bash: /etc/init.d/hostd: No such file or directory

I have successfully used the same command on another ESXi 4.1 box as recently as last week, so I am at loss as to why this isn't working?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:

/sbin/ restart

also try from the console - Restart Network Management Agents.

If that does not work, reboot, restart the ESXi Host. (e.g. cold boot, shutdown and restart it!)

This happens, make sure you are updated to the latest version of ESXi 4.1, and this happens less on 5.0, 5.1, and 5.5.
AndyB74Author Commented:
Hi Andrew,

This is what I get:

[root@vm3 log]# /sbin/ restart
-bash: /sbin/ No such file or directory

Why would that be missing as well?

I don't have physical access to the server unfortunately, and need to troubleshoot as much as I can before attempting an onsite visit.
AndyB74Author Commented:
OK - my BAD.  We are running ESX 4.1, not ESXi 4.1 (my other box is ESXi).  Sorry to mess everyone around.

This command worked: service mgmt-vmware restart

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AndyB74Author Commented:
We are running ESX not ESXi on this box.
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