cvs: add page (#6625)

pages/common/cvs.md

@@ -0,0 +1,32 @@
+# cvs
+
+> Concurrent Versions System, a revision control system.
+> More information: <https://cvs.nongnu.org>.
+
+- Create a new repository (requires the `CVSROOT` environment variable to be set externally):
+
+`cvs -d {{path/to/repository}} init`
+
+- Add a project to the repository:
+
+`cvs import -m "{{message}}" {{project_name}} {{version}} {{vendor}}`
+
+- Checkout a project:
+
+`cvs checkout {{project_name}}`
+
+- Show changes made to files:
+
+`cvs diff {{path/to/file}}`
+
+- Add a file:
+
+`cvs add {{path/to/file}}`
+
+- Commit a file:
+
+`cvs commit -m "{{message}}" {{path/to/file}}`
+
+- Update the working directory from the remote repository:
+
+`cvs update`