Update cheatsheets

shred

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# shred
+
+> Overwrite files to securely delete data.
+> More information: <https://www.gnu.org/software/coreutils/shred>.
+
+- Overwrite a file:
+
+`shred {{path/to/file}}`
+
+- Overwrite a file and show progress on the screen:
+
+`shred --verbose {{path/to/file}}`
+
+- Overwrite a file, leaving [z]eros instead of random data:
+
+`shred --zero {{path/to/file}}`
+
+- Overwrite a file a specific [n]umber of times:
+
+`shred --iterations {{25}} {{path/to/file}}`
+
+- Overwrite a file and remove it:
+
+`shred --remove {{path/to/file}}`
+
+- Overwrite a file 100 times, add a final overwrite with [z]eros, remove the file after overwriting it and show [v]erbose progress on the screen:
+
+`shred -vzun 100 {{path/to/file}}`