Update the docs for --link accept container id

Signed-off-by: Lei Jitang <leijitang@huawei.com>

docs/man/docker-create.1.md

@@ -102,7 +102,7 @@ IMAGE [COMMAND] [ARG...]
                                'host': use the host shared memory,semaphores and message queues inside the container.  Note: the host mode gives the container full access to local shared memory and is therefore considered insecure.
 
 **--link**=[]
-   Add link to another container in the form of name:alias
+   Add link to another container in the form of <name or id>:alias
 
 **--lxc-conf**=[]
    (lxc exec-driver only) Add custom lxc options --lxc-conf="lxc.cgroup.cpuset.cpus = 0,1"

docs/man/docker-run.1.md

@@ -170,7 +170,7 @@ ENTRYPOINT.
                                'host': use the host shared memory,semaphores and message queues inside the container.  Note: the host mode gives the container full access to local shared memory and is therefore considered insecure.
 
 **--link**=[]
-   Add link to another container in the form of name:alias
+   Add link to another container in the form of <name or id>:alias
 
    If the operator
 uses **--link** when starting the new client container, then the client

docs/sources/articles/networking.md

@@ -105,7 +105,7 @@ Finally, several networking options can only be provided when calling
     [Configuring DNS](#dns) and
     [How Docker networks a container](#container-networking)
 
- *  `--link=CONTAINER_NAME:ALIAS` — see
+ *  `--link=CONTAINER_NAME_or_ID:ALIAS` — see
     [Configuring DNS](#dns) and
     [Communication between containers](#between-containers)
 
@@ -158,10 +158,10 @@ Four different options affect container domain name services.
     outside the container.  It will not appear in `docker ps` nor in the
     `/etc/hosts` file of any other container.
 
- *  `--link=CONTAINER_NAME:ALIAS` — using this option as you `run` a
+ *  `--link=CONTAINER_NAME_or_ID:ALIAS` — using this option as you `run` a
     container gives the new container's `/etc/hosts` an extra entry
-    named `ALIAS` that points to the IP address of the container named
+    named `ALIAS` that points to the IP address of the container identified by
-    `CONTAINER_NAME`.  This lets processes inside the new container
+    `CONTAINER_NAME_or_ID`.  This lets processes inside the new container
     connect to the hostname `ALIAS` without having to know its IP.  The
     `--link=` option is discussed in more detail below, in the section
     [Communication between containers](#between-containers). Because
@@ -284,7 +284,7 @@ If you choose the most secure setting of `--icc=false`, then how can
 containers communicate in those cases where you *want* them to provide
 each other services?
 
-The answer is the `--link=CONTAINER_NAME:ALIAS` option, which was
+The answer is the `--link=CONTAINER_NAME_or_ID:ALIAS` option, which was
 mentioned in the previous section because of its effect upon name
 services.  If the Docker daemon is running with both `--icc=false` and
 `--iptables=true` then, when it sees `docker run` invoked with the

docs/sources/reference/commandline/cli.md

@@ -738,7 +738,7 @@ Creates a new container.
       --ipc=""                   Default is to create a private IPC namespace (POSIX SysV IPC) for the container
                                    'container:<name|id>': reuses another container shared memory, semaphores and message queues
                                    'host': use the host shared memory,semaphores and message queues inside the container.  Note: the host mode gives the container full access to local shared memory and is therefore considered insecure.
-      --link=[]                  Add link to another container in the form of name:alias
+      --link=[]                  Add link to another container in the form of <name or id>:alias
       --lxc-conf=[]              (lxc exec-driver only) Add custom lxc options --lxc-conf="lxc.cgroup.cpuset.cpus = 0,1"
       -m, --memory=""            Memory limit (format: <number><optional unit>, where unit = b, k, m or g)
       --mac-address=""           Container MAC address (e.g. 92:d0:c6:0a:29:33)

docs/sources/reference/run.md

@@ -512,7 +512,7 @@ or override the Dockerfile's exposed defaults:
                    Both hostPort and containerPort can be specified as a range of ports. 
                    When specifying ranges for both, the number of container ports in the range must match the number of host ports in the range. (e.g., `-p 1234-1236:1234-1236/tcp`)
                    (use 'docker port' to see the actual mapping)
-    --link=""  : Add link to another container (name:alias)
+    --link=""  : Add link to another container (<name or id>:alias)
 
 As mentioned previously, `EXPOSE` (and `--expose`) makes ports available
 **in** a container for incoming connections. The port number on the
@@ -595,7 +595,7 @@ above, or already defined by the developer with a Dockerfile `ENV`:
 
 Similarly the operator can set the **hostname** with `-h`.
 
-`--link name:alias` also sets environment variables, using the *alias* string to
+`--link <name or id>:alias` also sets environment variables, using the *alias* string to
 define environment variables within the container that give the IP and PORT
 information for connecting to the service container. Let's imagine we have a
 container running Redis:

docs/sources/userguide/dockerlinks.md

@@ -146,7 +146,7 @@ Now, create a new `web` container and link it with your `db` container.
 This will link the new `web` container with the `db` container you created
 earlier. The `--link` flag takes the form:
 
-    --link name:alias
+    --link <name or id>:alias
 
 Where `name` is the name of the container we're linking to and `alias` is an
 alias for the link name. You'll see how that alias gets used shortly.