diff --git a/.linux/bash/module/disk.sh b/.linux/bash/module/disk.sh
index c4d1f3b..377edd9 100644
--- a/.linux/bash/module/disk.sh
+++ b/.linux/bash/module/disk.sh
@@ -1,5 +1,5 @@
 # show only physical drive sizes.
-alias df='df --si | sed -e "/^tmpfs/d" -e "/^udev/d" -e "/\.Private/d" -e "/^overlay/d" -e "/^shm/d" -e "/^devtmpfs/d"'
+alias df='df --si | sed -e '1p' -e "/^\/dev\//!d"'
 
 # show combined size in SI.
 alias du="du -sh --si"