diff --git a/database/command.go b/database/command.go
new file mode 100644
index 0000000..ba2b772
--- /dev/null
+++ b/database/command.go
@@ -0,0 +1,171 @@
+package database
+
+import (
+	"github.com/hdt3213/godis/interface/redis"
+	"github.com/hdt3213/godis/redis/protocol"
+	"strings"
+)
+
+func init() {
+
+}
+
+var commandTable = make(map[string]*godisCommand)
+
+const (
+	Write         = "write"
+	Readonly      = "readonly"
+	Denyoom       = "denyoom"
+	Admin         = "admin"
+	Pubsub        = "pubsub"
+	Noscript      = "noscript"
+	Random        = "random"
+	SortForScript = "sortforscript"
+	Loading       = "loading"
+	Stale         = "stale"
+	SkipMonitor   = "skip_monitor"
+	Asking        = "asking"
+	Fast          = "fast"
+	Movablekeys   = "movablekeys"
+)
+
+type godisCommand struct {
+	name       string
+	arity      int
+	signs      []string
+	firstKey   int
+	lastKey    int
+	stepNumber int
+	prepare    PreFunc
+}
+
+func RegisterGodisCommand(name string, arity int, signs []string, firstKey int, lastKey int, stepNumber int, prepare PreFunc) {
+	name = strings.ToLower(name)
+	commandTable[name] = &godisCommand{
+		name:       name,
+		arity:      arity,
+		signs:      signs,
+		firstKey:   firstKey,
+		lastKey:    lastKey,
+		stepNumber: stepNumber,
+		prepare:    prepare,
+	}
+}
+
+func execCommand(args [][]byte) redis.Reply {
+	n := len(args)
+	if n > 1 {
+		subCommand := strings.ToUpper(string(args[1]))
+		if subCommand == "INFO" {
+			return getCommands(args[2:])
+		} else if subCommand == "COUNT" {
+			return protocol.MakeIntReply(int64(len(commandTable)))
+		} else if subCommand == "GETKEYS" {
+			if n < 2 {
+				return protocol.MakeErrReply("Unknown subcommand or wrong number of arguments for '" + subCommand + "'")
+			}
+			return getKeys(args[2:])
+		} else {
+			return protocol.MakeErrReply("Unknow subcomand or wrong number of arguments for '" + subCommand + "'")
+		}
+	} else {
+		return getAllGodisCommandReply()
+	}
+}
+
+func getKeys(args [][]byte) redis.Reply {
+	key := string(args[0])
+	command, ok := commandTable[key]
+	if !ok {
+		return protocol.MakeErrReply("Invalid command specified")
+	}
+	arity := command.arity
+	if arity > 0 {
+		if len(args) != arity {
+			return protocol.MakeErrReply("Invalid number of arguments specified for command")
+		}
+	} else {
+		if len(args) < -arity {
+			return protocol.MakeErrReply("Invalid number of arguments specified for command")
+		}
+	}
+
+	prepare := command.prepare
+	if prepare == nil {
+		return protocol.MakeErrReply("The command has no key arguments")
+	}
+	writeKeys, readKeys := prepare(args[1:])
+
+	keys := append(writeKeys, readKeys...)
+	replies := make([]redis.Reply, len(keys))
+	for i, key := range keys {
+		replies[i] = protocol.MakeBulkReply([]byte(key))
+	}
+	return protocol.MakeMultiRawReply(replies)
+}
+
+func getCommands(args [][]byte) redis.Reply {
+	replies := make([]redis.Reply, len(args))
+
+	for i, v := range args {
+		reply, ok := commandTable[string(v)]
+		if ok {
+			replies[i] = reply.ToReply()
+		} else {
+			replies[i] = protocol.MakeNullBulkReply()
+		}
+	}
+
+	return protocol.MakeMultiRawReply(replies)
+}
+
+func getAllGodisCommandReply() redis.Reply {
+	replies := make([]redis.Reply, len(commandTable))
+	i := 0
+	for _, v := range commandTable {
+		replies[i] = v.ToReply()
+		i++
+	}
+	return protocol.MakeMultiRawReply(replies)
+}
+
+func (g *godisCommand) ToReply() redis.Reply {
+	args := make([]redis.Reply, 6)
+	args[0] = protocol.MakeBulkReply([]byte(g.name))
+	args[1] = protocol.MakeIntReply(int64(g.arity))
+	signs := make([]redis.Reply, len(g.signs))
+	for i, v := range g.signs {
+		signs[i] = protocol.MakeStatusReply(v)
+	}
+	args[2] = protocol.MakeMultiRawReply(signs)
+	args[3] = protocol.MakeIntReply(int64(g.firstKey))
+	args[4] = protocol.MakeIntReply(int64(g.lastKey))
+	args[5] = protocol.MakeIntReply(int64(g.stepNumber))
+
+	return protocol.MakeMultiRawReply(args)
+}
+
+func init() {
+	RegisterGodisCommand("Command", 0, []string{Random, Loading, Stale}, 0, 0, 0, nil)
+
+	RegisterGodisCommand("Keys", 2, []string{Readonly, SortForScript}, 0, 0, 0, nil)
+	RegisterGodisCommand("Auth", 2, []string{Noscript, Loading, Stale, SkipMonitor, Fast}, 0, 0, 0, nil)
+	RegisterGodisCommand("Info", -1, []string{Random, Loading, Stale}, 0, 0, 0, nil)
+	RegisterGodisCommand("Slaveof", 3, []string{Admin, Noscript, Stale}, 0, 0, 0, nil)
+	RegisterGodisCommand("Subscribe", -2, []string{Pubsub, Noscript, Loading, Stale}, 0, 0, 0, nil)
+	RegisterGodisCommand("Publish", 3, []string{Pubsub, Noscript, Loading, Fast}, 0, 0, 0, nil)
+	RegisterGodisCommand("FlushAll", -1, []string{Write}, 0, 0, 0, nil)
+	RegisterGodisCommand("FlushDb", -1, []string{Write}, 0, 0, 0, nil)
+	RegisterGodisCommand("Save", 1, []string{Admin, Noscript}, 0, 0, 0, nil)
+	RegisterGodisCommand("BgSave", 1, []string{Admin, Noscript}, 0, 0, 0, nil)
+	RegisterGodisCommand("Select", 2, []string{Loading, Fast}, 0, 0, 0, nil)
+	RegisterGodisCommand("Replconf", -1, []string{Admin, Noscript, Loading, Stale}, 0, 0, 0, nil)
+	RegisterGodisCommand("Replconf", 3, []string{Readonly, Admin, Noscript}, 0, 0, 0, nil)
+
+	// transaction command
+	RegisterGodisCommand("Multi", 1, []string{Noscript, Fast}, 0, 0, 0, nil)
+	RegisterGodisCommand("Discard", 1, []string{Noscript, Fast}, 0, 0, 0, nil)
+	RegisterGodisCommand("Exec", 1, []string{Noscript, SkipMonitor}, 0, 0, 0, nil)
+	RegisterGodisCommand("Watch", 1, []string{Noscript, Fast}, 1, -1, 1, readAllKeys)
+
+}
diff --git a/database/geo.go b/database/geo.go
index f53bda2..5c00c18 100644
--- a/database/geo.go
+++ b/database/geo.go
@@ -269,3 +269,13 @@ func init() {
 	RegisterCommand("GeoRadius", execGeoRadius, readFirstKey, nil, -6, flagReadOnly)
 	RegisterCommand("GeoRadiusByMember", execGeoRadiusByMember, readFirstKey, nil, -5, flagReadOnly)
 }
+
+func init() {
+	RegisterGodisCommand("GeoAdd", -5, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("GeoPos", -2, []string{Readonly}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("GeoDist", -4, []string{Readonly}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("GeoHash", -2, []string{Readonly}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("GeoRadius", -6, []string{Write, Movablekeys}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("GeoRadiusByMember", -5, []string{Write, Movablekeys}, 1, 1, 1, readFirstKey)
+
+}
diff --git a/database/hash.go b/database/hash.go
index aa8215f..d518061 100644
--- a/database/hash.go
+++ b/database/hash.go
@@ -515,3 +515,22 @@ func init() {
 	RegisterCommand("HIncrByFloat", execHIncrByFloat, writeFirstKey, undoHIncr, 4, flagWrite)
 	RegisterCommand("HRandField", execHRandField, readFirstKey, nil, -2, flagReadOnly)
 }
+
+func init() {
+	RegisterGodisCommand("HSet", 4, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("HSetNX", 4, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("HGet", 3, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("HExists", 3, []string{Readonly, Fast}, 1, 1, 1, readAllKeys)
+	RegisterGodisCommand("HDel", -3, []string{Write, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("HLen", 2, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("HStrlen", 3, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("HMSet", -1, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("HMGet", -3, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("HGet", -3, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("HKeys", 2, []string{Readonly, SortForScript}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("HVals", 2, []string{Readonly, SortForScript}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("HGetAll", 2, []string{Readonly, Random}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("HIncrBy", 4, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("HIncrByFloat", 4, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("HRandField", -2, []string{Random, Readonly}, 1, 1, 1, readFirstKey)
+}
diff --git a/database/keys.go b/database/keys.go
index 7328dc5..1f028ef 100644
--- a/database/keys.go
+++ b/database/keys.go
@@ -426,3 +426,21 @@ func init() {
 	RegisterCommand("RenameNx", execRenameNx, prepareRename, undoRename, 3, flagReadOnly)
 	RegisterCommand("Keys", execKeys, noPrepare, nil, 2, flagReadOnly)
 }
+
+func init() {
+	RegisterGodisCommand("Del", -2, []string{Write}, 1, -1, 1, writeAllKeys)
+	RegisterGodisCommand("Expire", 3, []string{Write, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("ExpireAt", 3, []string{Write, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("ExpireTime", 2, []string{Write, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("PExpire", 3, []string{Write, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("PExpireAt", 3, []string{Write, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("PExpireTime", 2, []string{Write, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("TTL", 2, []string{Readonly, Random, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("PTTL", 2, []string{Readonly, Random, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("Persist", 2, []string{Write, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("Exists", -2, []string{Readonly, Fast}, 1, 1, 1, readAllKeys)
+	RegisterGodisCommand("Type", 2, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("Rename", 3, []string{Write}, 1, 1, 1, prepareRename)
+	RegisterGodisCommand("RenameNx", 3, []string{Write, Fast}, 1, 1, 1, prepareRename)
+	RegisterGodisCommand("Keys", 2, []string{Readonly, SortForScript}, 1, 1, 1, nil)
+}
diff --git a/database/list.go b/database/list.go
index 17a9c96..8d0ada8 100644
--- a/database/list.go
+++ b/database/list.go
@@ -524,3 +524,18 @@ func init() {
 	RegisterCommand("LSet", execLSet, writeFirstKey, undoLSet, 4, flagWrite)
 	RegisterCommand("LRange", execLRange, readFirstKey, nil, 4, flagReadOnly)
 }
+
+func init() {
+	RegisterGodisCommand("LPush", -3, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("LPushX", -3, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("RPush", -3, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("RPushX", -3, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("LPop", 2, []string{Write, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("RPop", 2, []string{Write, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("RPopLPush", 3, []string{Write, Denyoom}, 1, 1, 1, prepareRPopLPush)
+	RegisterGodisCommand("LRem", 4, []string{Write}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("LLen", 2, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("LIndex", 3, []string{Readonly}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("LSet", 4, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("LRange", 4, []string{Readonly}, 1, 1, 1, readFirstKey)
+}
diff --git a/database/server.go b/database/server.go
index da857f1..6289ea3 100644
--- a/database/server.go
+++ b/database/server.go
@@ -107,6 +107,8 @@ func (server *Server) Exec(c redis.Connection, cmdLine [][]byte) (result redis.R
 			return protocol.MakeArgNumErrReply("SLAVEOF")
 		}
 		return server.execSlaveOf(c, cmdLine[1:])
+	} else if cmdName == "command" {
+		return execCommand(cmdLine)
 	}
 
 	// read only slave
diff --git a/database/set.go b/database/set.go
index e2ee089..48845b5 100644
--- a/database/set.go
+++ b/database/set.go
@@ -493,3 +493,19 @@ func init() {
 	RegisterCommand("SDiffStore", execSDiffStore, prepareSetCalculateStore, rollbackFirstKey, -3, flagWrite)
 	RegisterCommand("SRandMember", execSRandMember, readFirstKey, nil, -2, flagReadOnly)
 }
+
+func init() {
+	RegisterGodisCommand("SAdd", -3, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("SIsMember", 3, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("SRem", -3, []string{Write, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("SPop", -2, []string{Write, Random, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("SCard", 2, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("SMembers", 2, []string{Readonly, SortForScript}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("SInter", -2, []string{Readonly, SortForScript}, 1, -1, 1, prepareSetCalculate)
+	RegisterGodisCommand("SInterStore", -3, []string{Write, Denyoom}, 1, -1, 1, prepareSetCalculateStore)
+	RegisterGodisCommand("SUnion", -2, []string{Readonly, SortForScript}, 1, -1, 1, prepareSetCalculate)
+	RegisterGodisCommand("SUnionStore", -3, []string{Write, Denyoom}, 1, -1, 1, prepareSetCalculateStore)
+	RegisterGodisCommand("SDiff", -2, []string{Readonly, SortForScript}, 1, 1, 1, prepareSetCalculate)
+	RegisterGodisCommand("SDiffStore", -3, []string{Write, Denyoom}, 1, 1, 1, prepareSetCalculateStore)
+	RegisterGodisCommand("SRandMember", -2, []string{Readonly, Random}, 1, 1, 1, readFirstKey)
+}
diff --git a/database/sortedset.go b/database/sortedset.go
index c1012ae..7e51644 100644
--- a/database/sortedset.go
+++ b/database/sortedset.go
@@ -638,3 +638,21 @@ func init() {
 	RegisterCommand("ZRemRangeByScore", execZRemRangeByScore, writeFirstKey, rollbackFirstKey, 4, flagWrite)
 	RegisterCommand("ZRemRangeByRank", execZRemRangeByRank, writeFirstKey, rollbackFirstKey, 4, flagWrite)
 }
+
+func init() {
+	RegisterGodisCommand("ZAdd", -4, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("ZScore", 3, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("ZIncrBy", 4, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("ZRank", 3, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("ZCount", 4, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("ZRevRank", 3, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("ZCard", 2, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("ZRange", -4, []string{Readonly}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("ZRangeByScore", -4, []string{Readonly}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("ZRevRange", -4, []string{Readonly}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("ZRevRangeByScore", -4, []string{Readonly}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("ZPopMin", -2, []string{Write, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("ZRem", -3, []string{Write, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("ZRemRangeByScore", 4, []string{Write}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("ZRemRangeByRank", 4, []string{Write}, 1, 1, 1, writeFirstKey)
+}
diff --git a/database/string.go b/database/string.go
index d7318aa..e69a7de 100644
--- a/database/string.go
+++ b/database/string.go
@@ -865,3 +865,32 @@ func init() {
 	RegisterCommand("Randomkey", getRandomKey, readAllKeys, nil, 1, flagReadOnly)
 
 }
+
+func init() {
+	RegisterGodisCommand("Set", -3, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("SetNx", 3, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("SetEX", 4, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("PSetEX", 4, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("MSet", -3, []string{Write, Denyoom}, 1, -1, 2, prepareMSet)
+	RegisterGodisCommand("MGet", -2, []string{Readonly, Fast}, 1, 1, 1, prepareMSet)
+	RegisterGodisCommand("MSetNX", -3, []string{Write, Denyoom}, 1, 1, 1, prepareMSet)
+	RegisterGodisCommand("Get", 2, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("GetEX", -2, []string{Readonly, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("GetSet", 3, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("GetDel", 2, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("Incr", 2, []string{Write, Denyoom, Fast}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("IncrBy", 3, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("IncrByFloat", 3, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("Decr", 2, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("DecrBy", 3, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("StrLen", 2, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("Append", 3, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("SetRange", 4, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("GetRange", 4, []string{Readonly}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("SetBit", 4, []string{Write, Denyoom}, 1, 1, 1, writeFirstKey)
+	RegisterGodisCommand("GetBit", 3, []string{Readonly, Fast}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("BitCount", -2, []string{Readonly}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("BitPos", -3, []string{Readonly}, 1, 1, 1, readFirstKey)
+	RegisterGodisCommand("Randomkey", 1, []string{Readonly, Random}, 1, 1, 1, readAllKeys)
+
+}