Update cheatsheets

mongodump

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mongodump
+
+> Utility to export the contents of a MongoDB instance.
+> More information: <https://docs.mongodb.com/database-tools/mongodump/>.
+
+- Create a dump of all databases (this will place the files inside a directory called "dump"):
+
+`mongodump`
+
+- Specify an output location for the dump:
+
+`mongodump --out {{path/to/directory}}`
+
+- Create a dump of a given database:
+
+`mongodump --db {{database_name}}`
+
+- Create a dump of a given collection within a given database:
+
+`mongodump --collection {{collection_name}} --db {{database_name}}`
+
+- Connect to a given host running on a given port, and create a dump:
+
+`mongodump --host {{host}} --port {{port}}`
+
+- Create a dump of a given database with a given username; user will be prompted for password:
+
+`mongodump --username {{username}} {{database}} --password`
+
+- Create a dump from a specific instance; host, user, password and database will be defined in the connection string:
+
+`mongodump --uri {{connection_string}}`