importctl: new page (#16261)

Co-authored-by: Darío Hereñú <[email protected]>
Co-authored-by: Lena <[email protected]>
Co-authored-by: Managor <[email protected]>

Author: 4 people

pages/linux/importctl.md

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+# importctl
+
+> Download, Import, or Export disk images.
+> More information: <https://manned.org/importctl>.
+
+- Download image in tarball format from a url via pull:
+
+`sudo importctl pull-tar {{URL}} {{path/to/directory}}`
+
+- Pull or download from a remote source that is either raw or qcow2 file, and stores it as a raw file:
+
+`sudo importctl pull-raw {{https://example.com/source.ext}} {{name}} --class={{machine|portable|sysext|confext}}`
+
+- Import a raw disk image into the image directory that is possibly compressed with xz, gzip, or bzip2:
+
+`importctl import-raw {{path/to/file.ext}} {{name}} --class={{machine|portable|sysext|confext}}`
+
+- Export a container image as tarball into current working directory:
+
+`importctl export-tar --class={{machine|portable|sysext|confext}} {{name}} {{path/to/file.ext}}`