Update cheatsheets

dfc

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dfc
+
+> Gives an overview of the filesystem disk space usage with colors and graphs.
+> More information: <https://github.com/Rolinh/dfc>.
+
+- Display filesystems and their disk usage in human-readable form with colors and graphs:
+
+`dfc`
+
+- Display all filesystems including pseudo, duplicate and inaccessible filesystems:
+
+`dfc -a`
+
+- Display filesystems without color:
+
+`dfc -c never`
+
+- Display filesystems containing "ext" in the filesystem type:
+
+`dfc -t ext`