diff --git a/document/linux/config/bash/module/archive.sh b/document/linux/config/bash/module/archive.sh
index 1100b25..a3cc981 100644
--- a/document/linux/config/bash/module/archive.sh
+++ b/document/linux/config/bash/module/archive.sh
@@ -84,10 +84,10 @@ archive_check()
     saved="${saved%%.*}"
 
     # calculate actual hash.
-    actual="$(sha1sum $file | cut -d\  -f1)"
+    actual="$(pv ${file} | sha1sum | cut -d\  -f1)"
 
     # compare hashes, show error on mismatch.
-    if [[ "$actual" = "$saved" ]]; then
+    if [[ "${actual}" = "${saved}" ]]; then
       echo "${status}: OK."
     else
       echo -e "${color_red}${status}: failed.${color_default}"