mongos> db.version()
2.4.3
mongos> version()
2.4.3
mongos> buildInfo()
Sat Jun  1 08:18:27.040 ReferenceError: buildInfo is not defined (shell):1
mongos> db.adminCommand("buildInfo")
{
	"version" : "2.4.3",
	"gitVersion" : "nogitversion",
	"sysInfo" : "FreeBSD bayanbox1.bayan.ir 9.0-RELEASE-p3 FreeBSD 9.0-RELEASE-p3 #0: Tue Jun 12 02:52:29 UTC 2012     root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64 BOOST_LIB_VERSION=1_49",
	"loaderFlags" : "-fPIC -pthread -rdynamic",
	"compilerFlags" : "-Wnon-virtual-dtor -Woverloaded-virtual -fno-omit-frame-pointer -fPIC -fno-strict-aliasing -ggdb -pthread -Wall -Wsign-compare -Wno-unknown-pragmas -Winvalid-pch -O2 -pipe -fno-strict-aliasing",
	"allocator" : "system",
	"versionArray" : [
		2,
		4,
		3,
		0
	],
	"javascriptEngine" : "SpiderMonkey",
	"bits" : 64,
	"debug" : false,
	"maxBsonObjectSize" : 16777216,
	"ok" : 1
}
mongos> db.hostInfo()
{
	"system" : {
		"currentTime" : ISODate("2013-06-01T03:48:53.753Z"),
		"hostname" : "bayanbox1.bayan.ir",
		"cpuAddrSize" : 64,
		"memSizeMB" : 16165,
		"numCores" : 4,
		"cpuArch" : "amd64",
		"numaEnabled" : false
	},
	"os" : {
		"type" : "BSD",
		"name" : "FreeBSD",
		"version" : "FreeBSD 9.0-RELEASE-p3 #0: Tue Jun 12 02:52:29 UTC 2012\n    root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC\n"
	},
	"extra" : {
		
	},
	"ok" : 1
}
mongos> getHostName()
bayanbox1.bayan.ir