doc(cli): add section for global flags #1185

docs/modules/ROOT/pages/cli/cli.adoc

@@ -58,6 +58,35 @@ And each command also takes `--help` as parameter to output more information, eg
 kamel run --help
 ----
 
+== Global Flags
+
+While each command has a dedicated set of flags, there are global flags that are available to every command.
+
+.Global Flags
+|===
+|Flag |Description |Example
+
+|`--config` string
+|Path to the config file to use for CLI requests
+|`kamel install --config ~/.kube/config`
+
+|`-h` or `--help`
+|Help for kamel or the command
+|`kamel run --help`
+
+|`-n` or `--namespace` string
+|Namespace to use for all operations
+|`kamel get --namespace myspace`
+
+|===
+
+For command-specific flags, run `--help` with the command to obtain the full list as follows:
+
+[source]
+----
+kamel <command> --help
+----
+
 == Modeline
 
 Some command options in the CLI can be also specified as modeline in the source file, take a look at the xref:cli/modeline.adoc[Modeline section]