# Troubleshooting

## Checking Status and Restarting Redis

To check the status of the Redis server:

* For getting into the Redis container, use the command “redis-cli”.
* Inside Redis, use the command “PING” -

                \- If the response is “PONG” then the server is running. 

                \- If the response is blank or anything else other than “PONG,” the server is not running.

* To get out of the Redis container: “exit”.

## **Process to restart the service if the Redis server is down**

Restarting service mainly involves killing the service and starting it again.

**Procedure to kill a service:**

* For killing any service on a Linux machine, we need the process\_id of the service. The process\_id which we get as the output number for further steps in killing the service by running the command is: **$ ps aux|grep redis**.
* For killing an unresponsive service on a Linux machine, replace the **process\_id\_of\_service** with the value that you have noted down in the above step: 

       **$ sudo kill -9 process\_id\_of\_service**.

* To confirm if the service is killed: **$ sudo service redis-server status**.

**Procedure to start a service:**

* After successfully killing the service**,** to start the service: **$ sudo service redis-server start**.
* To check the status of the service: **$ sudo service redis-server status**.

Note: Check the status of the redis-server as mentioned above.

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