tomb: add page

pages/linux/tomb.md

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+# tomb
+
+> Manage the creation and access of encrypted storage files
+
+- Create a 100Mb tomb, lock it with a key, and mount it at /media/secret
+
+`tomb dig -s 100 {{secret.tomb}}`
+`tomb forge {{secret.tomb.key}}`
+`tomb lock {{secret.tomb}} -k {{secret.tomb.key}}`
+`tomb open {{secret.tomb}} -k {{secret.tomb.key}}`
+
+- List all open tombs
+
+`tomb list`
+
+- Close a tomb.
+
+`tomb close {{secret.tomb}}`
+
+- Open a local tomb using a remote key
+
+`ssh {{user@server.net}} 'cat {{secret.tomb.key}}' | tomb open {{secret.tomb}} -k -`
+
+- Open a remote tomb with a local key
+
+`gpd -d {{secret.tomb.key}} | ssh {{user@server.net}} tomb open {{secret.tomb}} -k cleartext --unsafe`