cgcreate: add page (#6768)

pages/linux/cgcreate.md

@@ -0,0 +1,17 @@
+# cgcreate
+
+> Create cgroups, used to limit, measure, and control resources used by processes.
+> `cgroups` types can be `memory`, `cpu`, `net_cls`, etc.
+> More information: <https://manned.org/cgcreate>.
+
+- Create a new group:
+
+`cgcreate -g {{group_type}}:{{group_name}}`
+
+- Create a new group with multiple cgroup types:
+
+`cgcreate -g {{group_type1}},{{group_type2}}:{{group_name}}`
+
+- Create a subgroup:
+
+`mkdir /sys/fs/cgroup/{{group_type}}/{{group_name}}/{{subgroup_name}}`