ostree: add page (#9843)

* ostree: add page

---------

Co-authored-by: Jack Lin <blueskyson1401@gmail.com>

pages/linux/ostree.md

@@ -0,0 +1,33 @@
+# ostree
+
+> Version control for binary files similar to git but optimized for operating system root filesystems.
+> OSTree is the foundation for immutable image-based operating systems such as Fedora Silverblue, Fedora IoT or Fedora CoreOS.
+> More information: <https://ostreedev.github.io/ostree>.
+
+- Initialize a repository of the files in `$PWD` with metadata in `$PWD/{{path/to/repo}}`:
+
+`ostree init --repo {{path/to/repo}}`
+
+- Create a commit (snapshot) of the files:
+
+`ostree commit --repo {{path/to/repo}} --branch {{branch_name}}`
+
+- Show files in commit:
+
+`ostree ls --repo {{path/to/repo}} {{commit_id}}`
+
+- Show metadata of commit:
+
+`ostree show --repo {{path/to/repo}} {{commit_id}}`
+
+- Show list of commits:
+
+`ostree log --repo {{path/to/repo}} {{branch_name}}`
+
+- Show repo summary:
+
+`ostree summary --repo {{path/to/repo}} --view`
+
+- Show available refs (branches):
+
+`ostree refs --repo {{path/to/repo}}`