diff --git a/.linux/bash/module/pack.sh b/.linux/bash/module/pack.sh
index a9f430e..ff8bb3e 100644
--- a/.linux/bash/module/pack.sh
+++ b/.linux/bash/module/pack.sh
@@ -42,6 +42,11 @@ pack()
     "zip")
       _pack_zip "${@}"
       ;;
+    "gz")
+      _pack_gz "${@}"
+      ;;
+    "xz")
+      _pack_xz "${@}"
   esac
 
   # actions on error.
@@ -81,6 +86,9 @@ unpack()
     # unpack file type.
     local type="${target##*.}"
 
+    [[ "${target}" =~ .tar.gz$ ]] && type="tar.gz"
+    [[ "${target}" =~ .tar.xz$ ]] && type="tar.xz"
+
     # unpack content.
     case "${type,,}" in
       "zip")
@@ -89,10 +97,10 @@ unpack()
       "7z")
         _unpack_7z "${target}"
         ;;
-      "tgz"|"gz")
+      "tgz"|"tar.gz")
         _unpack_tgz "${target}"
         ;;
-      "txz"|"xz")
+      "txz"|"tar.xz")
         _unpack_txz "${target}"
         ;;
       "tar")
@@ -104,6 +112,12 @@ unpack()
       "rar")
         _unpack_rar "${target}"
         ;;
+      "xz")
+        _unpack_xz "${target}"
+        ;;
+      "gz")
+        _unpack_gz "${target}"
+        ;;
       *)
         echo -e "${color_yellow}${target}: format not supported.${color_default}"
         return 2
@@ -152,40 +166,60 @@ _pack_tar()
   tar -c "${@:2}" | pv -s $(du -csb "${@:2}" | sed -n -e '$p' | awk '{print $1}') > "${1}"
 }
 
+_pack_gz()
+{
+  pv "${2}" | gzip -1 > "${1}"
+}
+
+_pack_xz()
+{
+  pv "${2}" | xz -9e > "${1}"
+}
+
 _unpack_zip()
 {
-  unzip "${@}"
+  unzip "${1}"
 }
 
 _unpack_7z()
 {
-  7za x "${@}"
+  7za x "${1}"
 }
 
 _unpack_tgz()
 {
-  pv "${@}" | gzip -d | tar -xf -
+  pv "${1}" | gzip -d | tar -xf -
 }
 
 _unpack_txz()
 {
-  pv "${@}" | xz -d | tar -xf -
+  pv "${1}" | xz -d | tar -xf -
 }
 
 _unpack_tar()
 {
-  pv "${@}" | tar -xf -
+  pv "${1}" | tar -xf -
 }
 
 _unpack_iso()
 {
-  7za x "${@}"
+  7za x "${1}"
 }
 
 _unpack_rar()
 {
-  unrar x "${@}"
+  unrar x "${1}"
+}
+
+_unpack_gz()
+{
+  pv "${1}" | gzip -d > "${1%.gz}"
+}
+
+_unpack_xz()
+{
+  pv "${1}" | xz -d > "${1%.xz}"
 }
 
 # export functions.
-export -f pack unpack _pack_tgz _pack_txz _pack_tar _pack_zip _unpack_zip _unpack_7z _unpack_tgz _unpack_txz _unpack_tar _pack_error _unpack_iso _unpack_rar
+export -f pack unpack _pack_tgz _pack_txz _pack_tar _pack_zip _unpack_zip _unpack_7z _unpack_tgz _unpack_txz _unpack_tar _pack_error _unpack_iso _unpack_rar _pack_gz _pack_xz _unpack_gz _unpack_xz