diff --git a/app.go b/app.go
index d98da03..104584b 100644
--- a/app.go
+++ b/app.go
@@ -18,10 +18,10 @@ type AppConfig struct {
 
 func (a AppConfig) getTime() time.Time {
 	for _, v := range a.Sources {
-		return cfg.Box[v.Box()].ssh.now
+		return cfg.Box[v.Box()].GetTime()
 	}
 	for _, v := range a.Destinations {
-		return cfg.Box[v.Box()].ssh.now
+		return cfg.Box[v.Box()].GetTime()
 	}
 	return time.Now()
 }
@@ -37,10 +37,10 @@ func (a AppConfig) getSchedule() (string, error) {
 		refreshSnapshot[v.Box()] = true
 	}
 	for k, _ := range refreshSnapshot {
-		err := cfg.Box[k].ssh.getSnapshotList()
+		err := cfg.Box[k].ZFSUpdateSnapshotList()
 		if err != nil {
 			if *debugFlag {
-				log.Printf("AppConfig.getSchedule : %s : getSnapshotList(%s) : %s", a.Name, k, err)
+				log.Printf("AppConfig.getSchedule : %s : ZFSUpdateSnapshotList(%s) : %s", a.Name, k, err)
 			}
 			return "", err
 		}
@@ -95,7 +95,7 @@ func (a AppConfig) needYearlySnapshot() bool {
 	re := regexp.MustCompile(`^yearly-(?P<Date>[0-9]{4}-[0-9]{2}-[0-9]{2}_[0-9]{2}.[0-9]{2}.[0-9]{2})--([0-9]+[ymwdhMs]{1}|forever)$`)
 	for _, src := range a.Sources {
 		timeSource[string(src)] = make(map[time.Time]struct{})
-		for _, snap := range cfg.Box[src.Box()].ssh.snapshot {
+		for _, snap := range cfg.Box[src.Box()].ZFSGetSnapshotList() {
 			if src.Path() == snap.Path() {
 				if re.MatchString(snap.Name()) {
 					dateString := re.ReplaceAllString(snap.Name(), "${Date}")
@@ -157,7 +157,7 @@ func (a AppConfig) needMonthlySnapshot() bool {
 	re := regexp.MustCompile(`^(yearly|monthly)-(?P<Date>[0-9]{4}-[0-9]{2}-[0-9]{2}_[0-9]{2}.[0-9]{2}.[0-9]{2})--([0-9]+[ymwdhMs]{1}|forever)$`)
 	for _, src := range a.Sources {
 		timeSource[string(src)] = make(map[time.Time]struct{})
-		for _, snap := range cfg.Box[src.Box()].ssh.snapshot {
+		for _, snap := range cfg.Box[src.Box()].ZFSGetSnapshotList() {
 			if src.Path() == snap.Path() {
 				if re.MatchString(snap.Name()) {
 					dateString := re.ReplaceAllString(snap.Name(), "${Date}")
@@ -219,7 +219,7 @@ func (a AppConfig) needWeeklySnapshot() bool {
 	re := regexp.MustCompile(`^(yearly|monthly|weekly)-(?P<Date>[0-9]{4}-[0-9]{2}-[0-9]{2}_[0-9]{2}.[0-9]{2}.[0-9]{2})--([0-9]+[ymwdhMs]{1}|forever)$`)
 	for _, src := range a.Sources {
 		timeSource[string(src)] = make(map[time.Time]struct{})
-		for _, snap := range cfg.Box[src.Box()].ssh.snapshot {
+		for _, snap := range cfg.Box[src.Box()].ZFSGetSnapshotList() {
 			if src.Path() == snap.Path() {
 				if re.MatchString(snap.Name()) {
 					dateString := re.ReplaceAllString(snap.Name(), "${Date}")
@@ -283,7 +283,7 @@ func (a AppConfig) needDailySnapshot() bool {
 	re := regexp.MustCompile(`^(yearly|monthly|weekly|daily)-(?P<Date>[0-9]{4}-[0-9]{2}-[0-9]{2}_[0-9]{2}.[0-9]{2}.[0-9]{2})--([0-9]+[ymwdhMs]{1}|forever)$`)
 	for _, src := range a.Sources {
 		timeSource[string(src)] = make(map[time.Time]struct{})
-		for _, snap := range cfg.Box[src.Box()].ssh.snapshot {
+		for _, snap := range cfg.Box[src.Box()].ZFSGetSnapshotList() {
 			if src.Path() == snap.Path() {
 				if re.MatchString(snap.Name()) {
 					dateString := re.ReplaceAllString(snap.Name(), "${Date}")
@@ -345,7 +345,7 @@ func (a AppConfig) needHourlySnapshot() bool {
 	re := regexp.MustCompile(`^(yearly|monthly|weekly|daily|hourly)-(?P<Date>[0-9]{4}-[0-9]{2}-[0-9]{2}_[0-9]{2}.[0-9]{2}.[0-9]{2})--([0-9]+[ymwdhMs]{1}|forever)$`)
 	for _, src := range a.Sources {
 		timeSource[string(src)] = make(map[time.Time]struct{})
-		for _, snap := range cfg.Box[src.Box()].ssh.snapshot {
+		for _, snap := range cfg.Box[src.Box()].ZFSGetSnapshotList() {
 			if src.Path() == snap.Path() {
 				if re.MatchString(snap.Name()) {
 					dateString := re.ReplaceAllString(snap.Name(), "${Date}")
@@ -391,12 +391,12 @@ func (a AppConfig) CheckZFS() error {
 	}
 
 	for _, src := range a.Sources {
-		if !cfg.Box[src.Box()].ssh.isZFS(src.Path()) {
+		if !cfg.Box[src.Box()].ZFSIsZFS(src.Path()) {
 			return fmt.Errorf("No path %s on source", string(src))
 		}
 		for _, dest := range a.Destinations {
-			if !cfg.Box[dest.Box()].ssh.isZFS(dest.Path() + "/" + src.Box() + "/" + src.Path()) {
-				err := cfg.Box[dest.Box()].ssh.createZFS(dest.Path() + "/" + src.Box() + "/" + src.Path())
+			if !cfg.Box[dest.Box()].ZFSIsZFS(dest.Path() + "/" + src.Box() + "/" + src.Path()) {
+				err := cfg.Box[dest.Box()].ZFSCreateZFS(dest.Path() + "/" + src.Box() + "/" + src.Path())
 				if err != nil {
 					if *debugFlag {
 						log.Printf("AppConfig.CheckZFS : %s : Error creating %s on %s", a.Name, dest.Path()+"/"+src.Box()+"/"+src.Path(), dest.Box())
@@ -417,7 +417,7 @@ func (a AppConfig) ExecBefore(schedule string) error {
 	for k, v := range a.Before {
 		re := regexp.MustCompile(k)
 		if re.MatchString(schedule) {
-			err := cfg.Box[v.Box()].ssh.exec(v.Path())
+			err := cfg.Box[v.Box()].SSHExec(v.Path())
 			if err != nil {
 				if *debugFlag {
 					log.Printf("AppConfig.ExecBefore : %s : Error executing %s", a.Name, string(v))
@@ -437,7 +437,7 @@ func (a AppConfig) ExecAfter(schedule string) error {
 	for k, v := range a.After {
 		re := regexp.MustCompile(k)
 		if re.MatchString(schedule) {
-			err := cfg.Box[v.Box()].ssh.exec(v.Path())
+			err := cfg.Box[v.Box()].SSHExec(v.Path())
 			if err != nil {
 				if *debugFlag {
 					log.Printf("AppConfig.ExecAfter : %s : Error executing %s on %s", a.Name, v.Path(), v.Box())
@@ -463,7 +463,7 @@ func (a AppConfig) TakeSnapshot(schedule string) error {
 		if *debugFlag {
 			log.Printf("AppConfig.TakeSnapshot : %s : taking snapshot on %s for %s", a.Name, k, v)
 		}
-		err := cfg.Box[k].ssh.exec("zfsnap snapshot -p " + schedule + "- -a " + cfg.Zfsnap[schedule] + v)
+		err := cfg.Box[k].SSHExec("zfsnap snapshot -p " + schedule + "- -a " + cfg.Zfsnap[schedule] + v)
 		if err != nil {
 			if *debugFlag {
 				log.Printf("AppConfig.TakeSnapshot : %s : Error executing zfsnap on %s", a.Name, k)
@@ -491,7 +491,7 @@ func (a AppConfig) RefreshSnapshot() error {
 		if *debugFlag {
 			log.Printf("AppConfig.RefreshSnapshot : %s : refreshing snapshots for source %s", a.Name, k)
 		}
-		err := cfg.Box[k].ssh.getSnapshotList()
+		err := cfg.Box[k].ZFSUpdateSnapshotList()
 		if err != nil {
 			if *debugFlag {
 				log.Printf("AppConfig.RefreshSnapshot : %s : Error getting snapshots on %s", a.Name, k)
@@ -512,12 +512,12 @@ func (a AppConfig) SendSnapshots() error {
 			if *debugFlag {
 				log.Printf("AppConfig.SendSnapshots : %s : Sending snapshots from %s to %s", a.Name, string(src), string(dest))
 			}
-			dLastSnapshot, err := cfg.Box[dest.Box()].ssh.getLastSnapshot(dest.Path() + "/" + src.Box() + "/" + src.Path())
+			dLastSnapshot, err := cfg.Box[dest.Box()].ZFSGetLastSnapshot(dest.Path() + "/" + src.Box() + "/" + src.Path())
 			if err != nil {
 				if *debugFlag {
 					log.Printf("AppConfig.SendSnapshots : %s : No snapshot for %s on %s", a.Name, string(src), dest.Box())
 				}
-				sFirstSnapshot, err := cfg.Box[src.Box()].ssh.getFirstSnapshot(src.Path())
+				sFirstSnapshot, err := cfg.Box[src.Box()].ZFSGetFirstSnapshot(src.Path())
 				if err != nil {
 					if *debugFlag {
 						log.Printf("AppConfig.SendSnapshots : %s : No snapshot for %s", a.Name, string(src))
@@ -527,7 +527,7 @@ func (a AppConfig) SendSnapshots() error {
 				if *debugFlag {
 					log.Printf("AppConfig.SendSnapshots : %s : Initializing snapshot on %s from %s", a.Name, dest.Box(), string(sFirstSnapshot))
 				}
-				err = cfg.Box[dest.Box()].ssh.exec("ssh " + cfg.Box[src.Box()].User + "@" + src.Box() + " zfs send " + string(sFirstSnapshot) + " | zfs recv -F " + dest.Path() + "/" + src.Box() + "/" + src.Path())
+				err = cfg.Box[dest.Box()].SSHExec("ssh " + cfg.Box[src.Box()].User + "@" + src.Box() + " zfs send " + string(sFirstSnapshot) + " | zfs recv -F " + dest.Path() + "/" + src.Box() + "/" + src.Path())
 				if err != nil {
 					if *debugFlag {
 						log.Printf("AppConfig.SendSnapshots : %s : Initializing snapshot on %s from %s failed (%s)", a.Name, dest.Box(), string(sFirstSnapshot), err)
@@ -536,13 +536,13 @@ func (a AppConfig) SendSnapshots() error {
 				}
 				var sCurrSnapshot Snapshot
 				sNextSnapshot := sFirstSnapshot
-				for !cfg.Box[src.Box()].ssh.isLastSnapshot(sNextSnapshot) {
+				for !cfg.Box[src.Box()].ZFSIsLastSnapshot(sNextSnapshot) {
 					sCurrSnapshot = sNextSnapshot
-					sNextSnapshot, err = cfg.Box[src.Box()].ssh.getNextSnapshot(sNextSnapshot)
+					sNextSnapshot, err = cfg.Box[src.Box()].ZFSGetNextSnapshot(sNextSnapshot)
 					if *debugFlag {
 						log.Printf("AppConfig.SendSnapshots : %s : Sending incrementally %s to %s", a.Name, string(sNextSnapshot), dest.Box())
 					}
-					err = cfg.Box[dest.Box()].ssh.exec("ssh " + cfg.Box[src.Box()].User + "@" + src.Box() + " zfs send -I " + string(sCurrSnapshot) + " " + string(sNextSnapshot) + " | zfs recv " + dest.Path() + "/" + src.Box() + "/" + src.Path())
+					err = cfg.Box[dest.Box()].SSHExec("ssh " + cfg.Box[src.Box()].User + "@" + src.Box() + " zfs send -I " + string(sCurrSnapshot) + " " + string(sNextSnapshot) + " | zfs recv " + dest.Path() + "/" + src.Box() + "/" + src.Path())
 					if err != nil {
 						if *debugFlag {
 							log.Printf("AppConfig.SendSnapshots : %s : Sending snapshot on %s from %s failed (%s)", a.Name, dest.Box(), string(sNextSnapshot), err)
@@ -560,13 +560,13 @@ func (a AppConfig) SendSnapshots() error {
 				}
 				var sCurrSnapshot Snapshot
 				sNextSnapshot := Snapshot(string(dLastSnapshot)[len(dest.Path())+len(src.Box())+2:])
-				for !cfg.Box[src.Box()].ssh.isLastSnapshot(sNextSnapshot) {
+				for !cfg.Box[src.Box()].ZFSIsLastSnapshot(sNextSnapshot) {
 					sCurrSnapshot = sNextSnapshot
-					sNextSnapshot, err = cfg.Box[src.Box()].ssh.getNextSnapshot(sNextSnapshot)
+					sNextSnapshot, err = cfg.Box[src.Box()].ZFSGetNextSnapshot(sNextSnapshot)
 					if *debugFlag {
 						log.Printf("AppConfig.SendSnapshots : %s : Sending incrementally %s to %s", a.Name, string(sNextSnapshot), dest.Box())
 					}
-					err = cfg.Box[dest.Box()].ssh.exec("ssh " + cfg.Box[src.Box()].User + "@" + src.Box() + " zfs send -I " + string(sCurrSnapshot) + " " + string(sNextSnapshot) + " | zfs recv " + dest.Path() + "/" + src.Box() + "/" + src.Path())
+					err = cfg.Box[dest.Box()].SSHExec("ssh " + cfg.Box[src.Box()].User + "@" + src.Box() + " zfs send -I " + string(sCurrSnapshot) + " " + string(sNextSnapshot) + " | zfs recv " + dest.Path() + "/" + src.Box() + "/" + src.Path())
 					if err != nil {
 						if *debugFlag {
 							log.Printf("AppConfig.SendSnapshots : %s : Sending snapshot on %s from %s failed (%s)", a.Name, dest.Box(), string(sNextSnapshot), err)
@@ -598,7 +598,7 @@ func (a AppConfig) CleanupSnapshot() error {
 		if *debugFlag {
 			log.Printf("AppConfig.CleanupSnapshot : %s : cleaning snapshots on %s for%s", a.Name, k, v)
 		}
-		err := cfg.Box[k].ssh.exec("zfsnap destroy -p hourly- -p daily- -p weekly- -p monthly- -p yearly-" + v)
+		err := cfg.Box[k].SSHExec("zfsnap destroy -p hourly- -p daily- -p weekly- -p monthly- -p yearly-" + v)
 		if err != nil {
 			if *debugFlag {
 				log.Printf("AppConfig.CleanupSnapshot : %s : Error executing zfsnap on %s", a.Name, k)
diff --git a/backup.go b/backup.go
index c54c845..32589bd 100644
--- a/backup.go
+++ b/backup.go
@@ -1,32 +1,11 @@
 package main
 
 import (
-	"bytes"
-	"encoding/json"
 	"flag"
-	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
-	"regexp"
-
-	"golang.org/x/crypto/ssh"
 )
 
-type Config struct {
-	Zfsnap   map[string]string     `json:"zfsnap"`
-	Box      map[string]*BoxConfig `json:"box"`
-	Apps     []AppConfig           `json:apps`
-	Timezone string                `json:"timezone"`
-}
-
-type BoxConfig struct {
-	Addr string `json:"addr"`
-	User string `json:"user"`
-	Key  string `json:"key"`
-	ssh  *SSHConfig
-}
-
 var (
 	appFlag   = flag.String("app", "", "run specific app")
 	cfgFile   = flag.String("config", "config.json", "config file")
@@ -37,165 +16,6 @@ var (
 	cfg       Config
 )
 
-//Load config from file
-func (c *Config) Load() error {
-	if *debugFlag {
-		log.Printf("SSHConfig.Load : Start")
-	}
-	b, err := ioutil.ReadFile(*cfgFile)
-	if err != nil {
-		if *debugFlag {
-			log.Printf("Config.Load : ioutil.ReadFile(%s) : %s", *cfgFile, err)
-		}
-		return err
-	}
-
-	err = json.Unmarshal(b, &c)
-	if err != nil {
-		if *debugFlag {
-			log.Printf("Config.Load : json.Unmarshal : %s", err)
-		}
-		return err
-	}
-
-	for k, v := range c.Box {
-		s := &SSHConfig{
-			logged: false,
-			name:   k,
-		}
-		v.ssh = s
-		keyRaw, err := ioutil.ReadFile(v.Key)
-		if err != nil {
-			if *debugFlag {
-				log.Printf("Config.Load : ioutil.ReadFile(%s) : %s", k, err)
-			}
-			return err
-		}
-
-		key, err := ssh.ParseRawPrivateKey(keyRaw)
-		if err != nil {
-			if *debugFlag {
-				log.Printf("Config.Load : ssh.ParseRawPrivateKey(%s) : %s", k, err)
-			}
-			return err
-		}
-
-		s.signer, err = ssh.NewSignerFromKey(key)
-		if err != nil {
-			if *debugFlag {
-				log.Printf("Config.Load : ssh.NewSignerFromKey(%s) : %s", k, err)
-			}
-			return err
-		}
-
-		s.config = &ssh.ClientConfig{
-			User: v.User,
-			Auth: []ssh.AuthMethod{
-				ssh.PublicKeys(s.signer),
-			},
-			HostKeyCallback: ssh.InsecureIgnoreHostKey(),
-		}
-
-		s.client, err = ssh.Dial("tcp", v.Addr, s.config)
-		if err != nil {
-			if *debugFlag {
-				log.Printf("Config.Load : ssh.Dial(%s) : %s", k, err)
-			}
-			return err
-		}
-
-		session, err := s.client.NewSession()
-		if err != nil {
-			if *debugFlag {
-				log.Printf("Config.Load : client.NewSession(%s) : %s", k, err)
-			}
-			return err
-		}
-
-		var b bytes.Buffer
-		session.Stdout = &b
-
-		err = session.Run("TZ=\"" + cfg.Timezone + "\" zfsnap --version")
-		if err != nil {
-			if *debugFlag {
-				log.Printf("Config.Load : client.NewSession(%s) : %s", k, err)
-			}
-			return err
-		}
-		if *debugFlag {
-			log.Printf("Config.Load : logged into %s : %s", k, b.String())
-		}
-		session.Close()
-		s.logged = true
-	}
-
-	for _, box := range c.Box {
-		err = box.ssh.getTime()
-		if err != nil {
-			if *debugFlag {
-				log.Printf("Config.Load : ssh.getTime() : %s", err)
-			}
-			return err
-		}
-	}
-
-	for _, app := range c.Apps {
-		for _, src := range app.Sources {
-			if !src.Valid() {
-				return fmt.Errorf("Source not valid : %s", string(src))
-			}
-			if _, ok := cfg.Box[src.Box()]; !ok {
-				return fmt.Errorf("No box defined for source : %s", string(src))
-			}
-		}
-		for _, dest := range app.Destinations {
-			if !dest.Valid() {
-				return fmt.Errorf("Destination not valid : %s", string(dest))
-			}
-			if _, ok := cfg.Box[dest.Box()]; !ok {
-				return fmt.Errorf("No box defined for destination : %s", string(dest))
-			}
-		}
-		for val, before := range app.Before {
-			_, err = regexp.Compile(val)
-			if err != nil {
-				if *debugFlag {
-					log.Printf("Config.Load : invalid regex : %s", val)
-				}
-				return err
-			}
-			if !before.Valid() {
-				return fmt.Errorf("Before not valid : %s", string(before))
-			}
-			if _, ok := cfg.Box[before.Box()]; !ok {
-				return fmt.Errorf("No box defined for before : %s", string(before))
-			}
-		}
-		for val, after := range app.After {
-			_, err = regexp.Compile(val)
-			if err != nil {
-				if *debugFlag {
-					log.Printf("Config.Load : invalid regex : %s", val)
-				}
-				return err
-			}
-			if !after.Valid() {
-				return fmt.Errorf("After not valid : %s", string(after))
-			}
-			if _, ok := cfg.Box[after.Box()]; !ok {
-				return fmt.Errorf("No box defined for after : %s", string(after))
-			}
-		}
-	}
-
-	return nil
-}
-
-//Close config
-func (c *Config) Close() error {
-	return nil
-}
-
 func main() {
 	flag.Parse()
 
diff --git a/box.go b/box.go
new file mode 100644
index 0000000..f784598
--- /dev/null
+++ b/box.go
@@ -0,0 +1,58 @@
+package main
+
+import "time"
+
+type Box struct {
+	Addr string `json:"addr"`
+	User string `json:"user"`
+	Key  string `json:"key"`
+	ssh  *SSHConfig
+}
+
+func (b *Box) ZFSGetLastSnapshot(path string) (s Snapshot, err error) {
+	return b.ssh.getLastSnapshot(path)
+}
+
+func (b *Box) ZFSIsLastSnapshot(s Snapshot) bool {
+	return b.ssh.isLastSnapshot(s)
+}
+
+func (b *Box) ZFSGetFirstSnapshot(path string) (s Snapshot, err error) {
+	return b.ssh.getFirstSnapshot(path)
+}
+
+func (b *Box) ZFSGetNextSnapshot(src Snapshot) (next Snapshot, err error) {
+	return b.ssh.getNextSnapshot(src)
+}
+
+func (b *Box) ZFSUpdateSnapshotList() (err error) {
+	return b.ssh.getSnapshotList()
+}
+
+func (b *Box) ZFSGetSnapshotList() []Snapshot {
+	return b.ssh.snapshot
+}
+
+func (b *Box) ZFSUpdateList() (err error) {
+	return b.ssh.getZFSList()
+}
+
+func (b *Box) ZFSIsZFS(path string) bool {
+	return b.ssh.isZFS(path)
+}
+
+func (b *Box) ZFSCreateZFS(path string) (err error) {
+	return b.ssh.createZFS(path)
+}
+
+func (b *Box) GetTime() time.Time {
+	return b.ssh.now
+}
+
+func (b *Box) UpdateTime() (err error) {
+	return b.ssh.getTime()
+}
+
+func (b *Box) SSHExec(cmd string) (err error) {
+	return b.ssh.exec(cmd)
+}
diff --git a/config.go b/config.go
new file mode 100644
index 0000000..1bbfa13
--- /dev/null
+++ b/config.go
@@ -0,0 +1,178 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"regexp"
+
+	"golang.org/x/crypto/ssh"
+)
+
+type Config struct {
+	Zfsnap   map[string]string `json:"zfsnap"`
+	Box      map[string]*Box   `json:"box"`
+	Apps     []AppConfig       `json:apps`
+	Timezone string            `json:"timezone"`
+}
+
+//Load config from file
+func (c *Config) Load() error {
+	if *debugFlag {
+		log.Printf("SSHConfig.Load : Start")
+	}
+	b, err := ioutil.ReadFile(*cfgFile)
+	if err != nil {
+		if *debugFlag {
+			log.Printf("Config.Load : ioutil.ReadFile(%s) : %s", *cfgFile, err)
+		}
+		return err
+	}
+
+	err = json.Unmarshal(b, &c)
+	if err != nil {
+		if *debugFlag {
+			log.Printf("Config.Load : json.Unmarshal : %s", err)
+		}
+		return err
+	}
+
+	for k, v := range c.Box {
+		s := &SSHConfig{
+			logged: false,
+			name:   k,
+		}
+		v.ssh = s
+		keyRaw, err := ioutil.ReadFile(v.Key)
+		if err != nil {
+			if *debugFlag {
+				log.Printf("Config.Load : ioutil.ReadFile(%s) : %s", k, err)
+			}
+			return err
+		}
+
+		key, err := ssh.ParseRawPrivateKey(keyRaw)
+		if err != nil {
+			if *debugFlag {
+				log.Printf("Config.Load : ssh.ParseRawPrivateKey(%s) : %s", k, err)
+			}
+			return err
+		}
+
+		s.signer, err = ssh.NewSignerFromKey(key)
+		if err != nil {
+			if *debugFlag {
+				log.Printf("Config.Load : ssh.NewSignerFromKey(%s) : %s", k, err)
+			}
+			return err
+		}
+
+		s.config = &ssh.ClientConfig{
+			User: v.User,
+			Auth: []ssh.AuthMethod{
+				ssh.PublicKeys(s.signer),
+			},
+			HostKeyCallback: ssh.InsecureIgnoreHostKey(),
+		}
+
+		s.client, err = ssh.Dial("tcp", v.Addr, s.config)
+		if err != nil {
+			if *debugFlag {
+				log.Printf("Config.Load : ssh.Dial(%s) : %s", k, err)
+			}
+			return err
+		}
+
+		session, err := s.client.NewSession()
+		if err != nil {
+			if *debugFlag {
+				log.Printf("Config.Load : client.NewSession(%s) : %s", k, err)
+			}
+			return err
+		}
+
+		var b bytes.Buffer
+		session.Stdout = &b
+
+		err = session.Run("TZ=\"" + cfg.Timezone + "\" zfsnap --version")
+		if err != nil {
+			if *debugFlag {
+				log.Printf("Config.Load : client.NewSession(%s) : %s", k, err)
+			}
+			return err
+		}
+		if *debugFlag {
+			log.Printf("Config.Load : logged into %s : %s", k, b.String())
+		}
+		session.Close()
+		s.logged = true
+	}
+
+	for _, box := range c.Box {
+		err = box.ssh.getTime()
+		if err != nil {
+			if *debugFlag {
+				log.Printf("Config.Load : ssh.getTime() : %s", err)
+			}
+			return err
+		}
+	}
+
+	for _, app := range c.Apps {
+		for _, src := range app.Sources {
+			if !src.Valid() {
+				return fmt.Errorf("Source not valid : %s", string(src))
+			}
+			if _, ok := cfg.Box[src.Box()]; !ok {
+				return fmt.Errorf("No box defined for source : %s", string(src))
+			}
+		}
+		for _, dest := range app.Destinations {
+			if !dest.Valid() {
+				return fmt.Errorf("Destination not valid : %s", string(dest))
+			}
+			if _, ok := cfg.Box[dest.Box()]; !ok {
+				return fmt.Errorf("No box defined for destination : %s", string(dest))
+			}
+		}
+		for val, before := range app.Before {
+			_, err = regexp.Compile(val)
+			if err != nil {
+				if *debugFlag {
+					log.Printf("Config.Load : invalid regex : %s", val)
+				}
+				return err
+			}
+			if !before.Valid() {
+				return fmt.Errorf("Before not valid : %s", string(before))
+			}
+			if _, ok := cfg.Box[before.Box()]; !ok {
+				return fmt.Errorf("No box defined for before : %s", string(before))
+			}
+		}
+		for val, after := range app.After {
+			_, err = regexp.Compile(val)
+			if err != nil {
+				if *debugFlag {
+					log.Printf("Config.Load : invalid regex : %s", val)
+				}
+				return err
+			}
+			if !after.Valid() {
+				return fmt.Errorf("After not valid : %s", string(after))
+			}
+			if _, ok := cfg.Box[after.Box()]; !ok {
+				return fmt.Errorf("No box defined for after : %s", string(after))
+			}
+		}
+	}
+
+	return nil
+}
+
+//Close config
+func (c *Config) Close() error {
+	return nil
+}
diff --git a/generate.go b/generate.go
new file mode 100644
index 0000000..8b92de7
--- /dev/null
+++ b/generate.go
@@ -0,0 +1,3 @@
+package main
+
+//go:generate bash ./version.sh
diff --git a/version.go b/version.go
new file mode 100644
index 0000000..ac92a2b
--- /dev/null
+++ b/version.go
@@ -0,0 +1,6 @@
+// Code generated by version.sh (@generated) DO NOT EDIT.
+package main
+var githash = "0f4fca3"
+var buildstamp = "2021-11-14_02:51:24"
+var commits = "17"
+var version = "0f4fca3-b17 - 2021-11-14_02:51:24"
diff --git a/version.sh b/version.sh
new file mode 100644
index 0000000..a436a5c
--- /dev/null
+++ b/version.sh
@@ -0,0 +1,13 @@
+# Get the version.
+githash=`git rev-parse --short HEAD`
+buildstamp=`date -u '+%Y-%m-%d_%H:%M:%S'`
+commits=`git rev-list --count master`
+# Write out the package.
+cat << EOF > version.go
+// Code generated by version.sh (@generated) DO NOT EDIT.
+package main
+var githash = "$githash"
+var buildstamp = "$buildstamp"
+var commits = "$commits"
+var version = "$githash-b$commits - $buildstamp"
+EOF
\ No newline at end of file
diff --git a/zfs.go b/zfs.go
new file mode 100644
index 0000000..06ab7d0
--- /dev/null
+++ b/zfs.go
@@ -0,0 +1 @@
+package main