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CentOS | RHEL: Check If A Service Is Running Or Not


We can use service command to get the status of services running on the system. It runs a System V init script in as predictable environment as possible, removing most environment variables and with current working directory set to /.

 Syntax is:

 service <service-name> status

 OR

 /etc/init.d/<service-name> status

 Example:

 Find, out if a service called httpd (Apache Web Server) is running on CentOS OR RHEL. Open a terminal or login using ssh, enter:

   #  service httpd status

 Sample outputs:

 [root@myserver ~]# service httpd status

 httpd (pid  21585) is running...

Find out status of all services

The service --status-all command runs all init scripts, in alphabetical order, with the status command:
 #  service --status-all
Sample output:-
[root@myserver ~]# service --status-all

 anacron is stopped

 atd is stopped

 auditd is stopped

 cpuspeed is stopped

 crond (pid 3442) is running...

 cupsd (pid 5004) is running...

 gpm (pid 3316) is running...

 hald is stopped

 httpd is stopped

 ipmi_msghandler module not loaded.

 ipmi_si module not loaded.

 ipmi_devintf module not loaded.

 /dev/ipmi0 does not exist.

 Firewall is stopped.

 irqbalance (pid 3031) is running...

 Usage: jboss {start|stop|restart}

 Usage: jboss {start|stop|restart}

 mdmpd is stopped

 dbus-daemon-1 is stopped

 /etc/init.d/microcode_ctl: reading microcode status is not yet supported

 Server address not specified in /etc/sysconfig/netdump

 netplugd is stopped

 Configured devices:

 lo eth0

 Currently active devices:

 lo eth0

 NetworkManager is stopped

 nscd is stopped

 ntpd (pid 3117) is running...

 rhnsd (pid 3498) is running...

 saslauthd is stopped

 sendmail (pid 3145 3135) is running...

 smartd is stopped

 snmpd (pid 5035) is running...

 snmptrapd is stopped

 sshd (pid 32692 32690 31125 31123 31007 31005 28859 28828 27800 27797 25769 25763 24868 24865 24453 24451 23420 23417 22077 22072 21991 21989 21578 21576 21185 21183 20987 20984 20757 20755 20665 20661 19843 19837 18508 18490 18447 18445 15355 15349 15268 15266 11588 11580 11106 11104 8560 8557 8494 8428 8426 8425 8408 7597 7591 7450 7448 6677 6671 5249 5233 4776 4772 4570 4563 3084 2807 2805 2307 2305 1909 1907 1548 1545) is running...

 syslogd (pid 3014) is running...

 klogd (pid 3018) is running...

 vsftpd is stopped

 winbindd is stopped

 wpa_supplicant is stopped

 xfs (pid 3463) is running...

 xinetd (pid 4898) is running...


ps or pgrep command

You can use ps or pgrep command as follows to find out if service is running or not on RHEL/Centos:
 #  ps aux | grep 'serviceName'
 # ps aux | grep 'httpd'


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