add the old snippet md files

old_snippets/wipe-mongo-collection.en.md

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+---
+title: "wipe a mongo collection"
+date: 2020-06-29T10:32:01+02:00
+draft: false
+snippet_types: ["mongo"]
+---
+
+Currently I run a shared mongo instance in my k8s cluster used by a bunch of my side projects.
+Every once in a while I have to manually execute mongo commands this is how I do so.
+
+Manually ssh into the pod:
+
+```shell
+$ kubectl exec -it shared-mongo-xxxxxxxxxx-xxxxx -- /bin/bash
+```
+
+Then launch the mongo shell and hack away:
+
+```shell
+$ mongo
+> db2 = db.getSiblingDB('coolDB')
+coolDB
+> db2.getCollectionNames()
+[ "coolThings" ]
+> db2.coolThings.count()
+666
+> db2.coolThings.remove({})
+WriteResult({ "nRemoved" : 666 })
+> db2.coolThings.count()
+0
+```
+
+source:
+- [stackoverflow -- mongodb-how-to-delete-all-records-of-a-collection-in-mongodb-shell](https://stackoverflow.com/questions/46368368/mongodb-how-to-delete-all-records-of-a-collection-in-mongodb-shell)
+- [stackoverflow -- how-can-i-list-all-collections-in-the-mongodb-shell](https://stackoverflow.com/questions/8866041/how-can-i-list-all-collections-in-the-mongodb-shell)