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How do I know whether a service is online?

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Operating Systems Linux Red Hat How do I know whether a service is online?
# 1  
Old 10-21-2012
Question How do I know whether a service is online?
Hi!

I'm a Solaris admin. I don't know how to check whether a service is online or not in Linux.

example:i've started a service using
Code:
#service named start
#service http start

How can i verify that these services are in running mode?
Last edited by Scott; 10-21-2012 at 11:56 AM.. Reason: Cleanup
# 2  
Old 10-21-2012
Code:
service httpd status

Check also the manual page for chkconfig.
# 3  
Old 04-19-2013
You can check by following command:

service httpd status

or you can check it by

Code:
chkconfig -list | grep apache2
apache2                   0:off  1:off  2:on   3:on   4:on   5:on   6:off


It will show the service started at boot time or not. 0-6 are runlevels which says it is on at boottime if you login by that run level.

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---------- Post updated at 12:52 PM ---------- Previous update was at 12:50 PM ----------

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# 4  
Old 04-19-2013
Hi
Besides

Code:
service NAME status

you can use netstat
Code:
netstat -tulnp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name
tcp        0      0 0.0.0.0:3306                0.0.0.0:*                   LISTEN      2402/mysqld
tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN      1187/sshd

mysql and ssh is running
# 5  
Old 04-22-2013
Server services online
There are various methods to confirm this.. My usual way is to check first whether the service is active on the corresponding port with help of telnet.

In the case of web service

HTML Code:
#telnet localhost 80
Or we can use

HTML Code:
#service httpd status
HTML Code:
#pidof httpd
HTML Code:
#ps -e | grep httpd
Always confirm from the Client end also if the service is a critical one.
# 6  
Old 04-23-2013
# ps -aux | grep httpd

Or

#service httpd status
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