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Old 12-15-2014, 12:47 PM   #1
JockVSJock
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Troubleshooting NTP issues, what does echo $? mean?


Doing some straight forward troubleshooting of NTP.

Once of the commands that I see to troubleshoot NTP is

# echo $?
# 0

I know this is some sort of Shell Command, however I don't understand what the command does and why it returns a value of 0 for our servers that are setup correctly for NTP.

The ones that aren't setup correctly for NTP is either returns a 1 or 0.

thanks
 
Old 12-15-2014, 01:10 PM   #2
szboardstretcher
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Here you are, please read this:

http://tldp.org/LDP/abs/html/internalvariables.html

And this:

http://www.tldp.org/LDP/abs/html/exit-status.html

To understand 'echo $?' and exit status codes.
 
Old 12-15-2014, 02:50 PM   #3
JockVSJock
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Thanks, marking as solved.
 
  


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