Update cheatsheets

dvc-config

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dvc config
+
+> Low level command to manage custom configuration options for dvc repositories.
+> These configurations can be on project, local, global, or system level.
+> More information: <https://dvc.org/doc/command-reference/config>.
+
+- Get the name of the default remote:
+
+`dvc config core.remote`
+
+- Set the project's default remote:
+
+`dvc config core.remote {{remote_name}}`
+
+- Unset the project's default remote:
+
+`dvc config --unset core.remote`
+
+- Get the configuration value for a specified key for the current project:
+
+`dvc config {{key}}`
+
+- Set the configuration value for a key on a project level:
+
+`dvc config {{key}} {{value}}`
+
+- Unset a project level configuration value for a given key:
+
+`dvc config --unset {{key}}`
+
+- Set a local, global, or system level configuration value:
+
+`dvc config --{{local|global|system}} {{key}} {{value}}`