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+# fstrim
+
+> Discard unused blocks on a mounted filesystem.
+> Only supported by flash memory devices such as SSDs and microSD cards.
+
+- Trim unused blocks on all mounted partitions that support it:
+
+`sudo fstrim --all`
+
+- Trim unused blocks on a specified partition:
+
+`sudo fstrim {{/}}`
+
+- Display statistics after trimming:
+
+`sudo fstrim --verbose {{/}}`