diff --git a/weed/command/backup.go b/weed/command/backup.go
index 072aea75b..0641f2e5d 100644
--- a/weed/command/backup.go
+++ b/weed/command/backup.go
@@ -41,7 +41,7 @@ var cmdBackup = &Command{
 	But it's tricky to incrementally copy the differences.
 	
 	The complexity comes when there are multiple addition, deletion and compaction.
-	This tool will handle them correctly and efficiently, avoiding unnecessary data transporation.
+	This tool will handle them correctly and efficiently, avoiding unnecessary data transportation.
   `,
 }
 
diff --git a/weed/command/upload.go b/weed/command/upload.go
index f664c0e3a..244caaa4c 100644
--- a/weed/command/upload.go
+++ b/weed/command/upload.go
@@ -53,7 +53,7 @@ var cmdUpload = &Command{
   All files under the folder and subfolders will be uploaded, each with its own file key.
   Optional parameter "-include" allows you to specify the file name patterns.
 
-  If "maxMB" is set to a positive number, files larger than it would be split into chunks and uploaded separatedly.
+  If "maxMB" is set to a positive number, files larger than it would be split into chunks and uploaded separately.
   The list of file ids of those chunks would be stored in an additional chunk, and this additional chunk's file id would be returned.
 
   `,
diff --git a/weed/operation/compress.go b/weed/operation/compress.go
index 65979d529..fedc877dd 100644
--- a/weed/operation/compress.go
+++ b/weed/operation/compress.go
@@ -30,7 +30,7 @@ func IsGzippable(ext, mtype string, data []byte) bool {
 		return false
 	}
 
-	// by file name extention
+	// by file name extension
 	switch ext {
 	case ".zip", ".rar", ".gz", ".bz2", ".xz":
 		return false
diff --git a/weed/security/guard.go b/weed/security/guard.go
index dea3b12f2..fd9c8e0b3 100644
--- a/weed/security/guard.go
+++ b/weed/security/guard.go
@@ -158,5 +158,5 @@ func (g *Guard) checkJwt(w http.ResponseWriter, r *http.Request) error {
 	}
 
 	glog.V(1).Infof("No permission from %s", r.RemoteAddr)
-	return fmt.Errorf("No write permisson from %s", r.RemoteAddr)
+	return fmt.Errorf("No write permission from %s", r.RemoteAddr)
 }
diff --git a/weed/topology/topology_vacuum.go b/weed/topology/topology_vacuum.go
index d6b09314b..48a75ba9d 100644
--- a/weed/topology/topology_vacuum.go
+++ b/weed/topology/topology_vacuum.go
@@ -82,7 +82,7 @@ func batchVacuumVolumeCompact(vl *VolumeLayout, vid storage.VolumeId, locationli
 func batchVacuumVolumeCommit(vl *VolumeLayout, vid storage.VolumeId, locationlist *VolumeLocationList) bool {
 	isCommitSuccess := true
 	for _, dn := range locationlist.list {
-		glog.V(0).Infoln("Start Commiting vacuum", vid, "on", dn.Url())
+		glog.V(0).Infoln("Start Committing vacuum", vid, "on", dn.Url())
 		err := operation.WithVolumeServerClient(dn.Url(), func(volumeServerClient volume_server_pb.VolumeServerClient) error {
 			_, err := volumeServerClient.VacuumVolumeCommit(context.Background(), &volume_server_pb.VacuumVolumeCommitRequest{
 				VolumdId: uint32(vid),
@@ -93,7 +93,7 @@ func batchVacuumVolumeCommit(vl *VolumeLayout, vid storage.VolumeId, locationlis
 			glog.Errorf("Error when committing vacuum %d on %s: %v", vid, dn.Url(), err)
 			isCommitSuccess = false
 		} else {
-			glog.V(0).Infof("Complete Commiting vacuum %d on %s", vid, dn.Url())
+			glog.V(0).Infof("Complete Committing vacuum %d on %s", vid, dn.Url())
 		}
 		if isCommitSuccess {
 			vl.SetVolumeAvailable(dn, vid)