jgwerner · February 1, 2017 17:51 · Feb 1, 2017 · Feb 1, 2017
diff --git a/useful-docker-commands.md b/useful-docker-commands.md
@@ -59,35 +59,37 @@ Obtain worker and manager tokens:
     $ docker swarm join-token manager
     $ docker swarm join-token worker
 
-Remove docker node:
+**Remove docker node**
 
-1. Login to worker node EC2 instance:
+Login to worker node EC2 instance:
 
     $ docker swarm leave
 
-2. Log into manager node EC2 instance:
+Log into manager node EC2 instance:
 
     $ docker swarm node rm {NODE_ID}
 
-Manually add new docker worker node:
+**Manually add new docker worker node**:
 
-1. Login to EC2 instance that will have worker node role and install docker engine.
-2. Login to worker EC2 instance:
+Login to EC2 instance that will have worker node role and install docker engine.
+
+Login to worker EC2 instance:
 
     $ docker swarm --token SWMTKN {WORKER_TOKEN} \
         {MANAGER_IP}:2377
 
-Add label to worker node:
+**Add label to worker node**:
+
+Log into manager instance.
 
-1. Log into manager instance.
-2. Update node and add labe:
+Update node and add label:
 
     $ docker node update --label-add {my_key=my_value} {NODE_ID} 
 
-Manually add new docker manager node:
+**Manually add new docker manager node**:
 
-1. Login to EC2 instance that will have manager node role and install docker engine.
-2. Login to manager EC2 instance:
+Login to EC2 instance that will have manager node role and install docker engine.
+Login to manager EC2 instance:
 
     $ docker swarm --token SWMTKN {MANAGER_TOKEN} \
         {MANAGER_IP}:2377

diff --git a/useful-docker-commands.md b/useful-docker-commands.md
@@ -0,0 +1,111 @@
+# Maintenance and troubleshooting commands
+
+## Installing Docker
+
+Docker install script is probably the best way to install docker with Ubuntu, as it's the official bash script maintained by Docker and is updated with latest features:
+
+    $ curl -sSL https://get.docker.com | sh
+
+## Uninstalling Docker
+
+Basic uninstall:
+
+    $ sudo apt-get remove docker-engine
+    $ sudo apt-get remove docker*
+
+Uninstall docker and its dependencies:
+
+    $ sudo apt-get remove --auto-remove docker-engine
+    $ sudo apt-get remove docker* 
+
+Purging your docker config/data only
+
+    $ sudo apt-get purge docker-engine
+    $ sudo apt-get purge docker*
+
+Purging your docker config/data with dependencies
+
+    $ sudo apt-get purge --auto-remove docker-engine
+    $ sudo apt-get purge --auto-remove docker*
+
+> Be careful when you uninstalling docker by purging. Purged config/data can not be restored by reinstalling the package.
+
+## Docker commands
+
+View containers in run state with pretty table:
+
+    $ docker ps --format "table {{.ID}}\t{{.Image}}\t{{.Names}}"
+
+### Legacy swarm (`Docker Swarm`)
+
+View swarm nodes from Swarm manager or replica (assuming port 4000 was used to launch swarm manager):
+
+    $ docker -H :4000 info
+
+Execute commands (run, info, ps, etc) from external host assuming that port 2375 was used for daemon binding:
+
+    $ docker -H {host ip address}:2375 info
+
+### Latest swarm (`Swarm Mode`)
+
+Initialize swarm:
+
+    $ docker swarm init
+
+> This command returns a join-token for the worker node.
+
+Obtain worker and manager tokens:
+
+    $ docker swarm join-token manager
+    $ docker swarm join-token worker
+
+Remove docker node:
+
+1. Login to worker node EC2 instance:
+
+    $ docker swarm leave
+
+2. Log into manager node EC2 instance:
+
+    $ docker swarm node rm {NODE_ID}
+
+Manually add new docker worker node:
+
+1. Login to EC2 instance that will have worker node role and install docker engine.
+2. Login to worker EC2 instance:
+
+    $ docker swarm --token SWMTKN {WORKER_TOKEN} \
+        {MANAGER_IP}:2377
+
+Add label to worker node:
+
+1. Log into manager instance.
+2. Update node and add labe:
+
+    $ docker node update --label-add {my_key=my_value} {NODE_ID} 
+
+Manually add new docker manager node:
+
+1. Login to EC2 instance that will have manager node role and install docker engine.
+2. Login to manager EC2 instance:
+
+    $ docker swarm --token SWMTKN {MANAGER_TOKEN} \
+        {MANAGER_IP}:2377
+
+## Host (EC2) commands
+
+Resource stats for memory use:
+
+    $ egrep --color 'Mem|Cached|Swap' /proc/meminfo
+
+Resource stats for disk use:
+
+    $ egrep --color df -h
+
+Check current mounts:
+
+    $ lsblk
+
+Check to see if swap is configured:
+
+    $ swapon -s