Updated Utilize multiple DNS API keys (markdown)

Utilize-multiple-DNS-API-keys.md

@@ -6,7 +6,7 @@ So, what if you have multiple dns api keys.  The key point is to use multiple `a
 
 You can use either of the following ways:
 
-## 2. Use muitlple linux users to install and use acme.sh
+## 1. Use muitlple linux users to install and use acme.sh
 
 It's the easiest way to use.  You can just create multiple Linux users, and install and use acme.sh for each users:
 
@@ -37,3 +37,48 @@ acme.sh --issue -d domain1.com --dns ........
 ```
 
 
+## 2.  Use multiple `--config-home`
+
+The global `account.conf` file is saved in the `--config-home` by default.  So, you can use different `--config-home`.
+
+
+```
+curl https://get.acme.sh | sh -s email=my@example.com
+
+```
+
+The default config home is at `~/.acme.sh`.
+
+You can specify a custom config home on any of the acme.sh commands:
+
+```
+
+export MY_DNS_key2=xxxxxxx
+acme.sh  --config-home ~/.myacme   --issue  -d example.com ......
+
+```
+
+Every time you want to use the `MY_DNS_key2` to issue certs,  you need to use the `--config-home` parameter:
+
+```
+acme.sh  --config-home ~/.myacme   --issue .....
+
+acme.sh  --config-home ~/.myacme   --renew ......
+
+acme.sh  --config-home ~/.myacme   --revoke .....
+
+
+```
+
+
+You will also need to add a new crontab entry to make it renew automatically:
+
+```
+30 0 * * * "/root/.acme.sh"/acme.sh --cron --home "/root/.acme.sh"  --config-home "/root/.myacme"    > /dev/null
+```
+
+
+
+
+
+