fix error hooks and add listing everything

docs/content/cli/exec.md

@@ -2,14 +2,23 @@
 title: Exec
 ---
 
-The `exec` subcommand can do some things that the configuration file can't do yet. The command `exec host` can execute commands on many hosts.
+~~The `exec` subcommand can do some things that the configuration file can't do yet. The command `exec host` can execute commands on many hosts.~~
+
+{{% notice info %}}
+  For now only the `exec host` sub-command is implemented. More to come.
+{{% /notice %}}
+
+{{% notice warning %}}
+  The config file's `hosts` are overridden by this command. Hooks are not altered. For consistent results, create a local config file with only the hosts you want to use.
+{{% /notice %}}
+
 
 `exec host` takes the following arguments:
 
 ```sh
-  -c, --commands strings   Accepts space-separated names of commands.
-  -h, --help               help for host
-  -m, --hosts strings      Accepts space-separated names of hosts.
+  -c, --command stringArray   Accepts space-separated names of commands. Specify multiple times for multiple commands.
+  -h, --help                  help for host
+  -m, --hosts stringArray     Accepts space-separated names of hosts. Specify multiple times for multiple hosts.
 ```
 
 The commands have to be defined in the config file. The hosts need to at least be in the ssh_config(5) file.