Move pages under tldr, lint run.sh, update docs

tldr/linux/losetup

@@ -0,0 +1,33 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# losetup
+
+> Set up and control loop devices.
+> More information: <https://manned.org/losetup>.
+
+- List loop devices with detailed info:
+
+`losetup -a`
+
+- Attach a file to a given loop device:
+
+`sudo losetup /dev/{{loop}} /{{path/to/file}}`
+
+- Attach a file to a new free loop device and scan the device for partitions:
+
+`sudo losetup --show --partscan -f /{{path/to/file}}`
+
+- Attach a file to a read-only loop device:
+
+`sudo losetup --read-only /dev/{{loop}} /{{path/to/file}}`
+
+- Detach all loop devices:
+
+`sudo losetup -D`
+
+- Detach a given loop device:
+
+`sudo losetup -d /dev/{{loop}}`