brctl: add page.

pages/common/id.md

@@ -2,7 +2,7 @@
 
 > Display current user and group identity.
 
-- Display current user id (UID), group id (GID) and groups of which you are a member:
+- Display current user id (UID), group id (GID) and groups to which they belong:
 
 `id`
 
@@ -14,6 +14,6 @@
 
 `id -g`
 
-- Display an arbitrary user's id (UID), group id (GID) and groups of which they are a member:
+- Display an arbitrary user's id (UID), group id (GID) and groups to which they belong:
 
 `id {{username}}`

pages/common/kill.md

@@ -27,10 +27,6 @@
 
 `kill -{{17|STOP}} {{process_id}}`
 
-- Send a signal to all processes with the given GID (group id):
+- Send a `SIGUSR1` signal to all processes with the given GID (group id):
 
-`kill -{{signal_name}} -{{group_id}}`
-
-- Kill every process that can be killed by the current user (except init and kill itself):
-
-`kill -9 -1`
+`kill -{{SIGUSR1}} -{{group_id}}`

pages/linux/brctl.md

@@ -0,0 +1,23 @@
+# brctl
+
+> Ethernet bridge administration.
+
+- Show a list with information about currently existing ethernet bridges:
+
+`sudo brctl show`
+
+- Create a new ethernet bridge interface:
+
+`sudo brctl add {{bridge_name}}`
+
+- Delete an existing ethernet bridge interface:
+
+`sudo brctl del {{bridge_name}}`
+
+- Add an interface to an existing bridge:
+
+`sudo brctl addif {{bridge_name}} {{interface_name}}`
+
+- Remove an interface from an existing bridge:
+
+`sudo brctl delif {{bridge_name}} {{interface_name}}`