zjtest7-frontend:/root# service rsyslog start

Starting system logger: usage: rsyslogd [options]

use "man rsyslogd" for details. To run rsyslog interactively, use "rsyslogd -n"to run it in debug mode use "rsyslogd -dn"

For further information see http://www.rsyslog.com/doc

                                                           [FAILED]

zjtest7-frontend:/root# rsyslogd -v

rsyslogd 8.21.0, compiled with:

	PLATFORM:				x86_64-redhat-linux-gnu

	PLATFORM (lsb_release -d):

	FEATURE_REGEXP:				Yes

	GSSAPI Kerberos 5 support:		No

	FEATURE_DEBUG (debug build, slow code):	No

	32bit Atomic operations supported:	Yes

	64bit Atomic operations supported:	Yes

	memory allocator:			system default

	Runtime Instrumentation (slow code):	No

	uuid support:				Yes

	Number of Bits in RainerScript integers: 64

See http://www.rsyslog.com for more information.

zjtest7-frontend:/etc/rsyslog.d# which rsyslogd

/sbin/rsyslogd

zjtest7-frontend:/etc/rsyslog.d# cd /usr/sbin/

zjtest7-frontend:/usr/sbin# ls -ltr *rsyslog*

-rwxr-xr-x 1 root root 2741283 Aug  4 15:27 rsyslogd

原因有两个rsyslogd