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@@ -385,7 +385,11 @@ Otherwise, this project now automatically sets up Xdebug support with VS Code. I
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Running Docker on Linux should be pretty straight-forward. Note that you need to run some [post install commands](https://docs.docker.com/install/linux/linux-postinstall/) as well as [installing Docker Compose](https://docs.docker.com/compose/install/). These steps are taken care of automatically with Docker Desktop, but not on Linux.
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-Be sure to see the "Linux only" documentation in the [docker-compose.dev.yml](https://github.com/markshust/docker-magento/blob/master/compose/docker-compose.dev.yml#L30) file. The `extra_hosts` param is required to be defined on Linux for proper DNS resolution.
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+The `host.docker.internal` hostname is [hard-coded in the php.ini file](https://github.com/markshust/docker-magento/blob/master/images/php/7.4/conf/php.ini#L8), but this hostname does not exist on Linux. To make this hostname resolve, uncomment the `extra_hosts` param in the `docker-compose.dev.yml` file, and replace `IP` with result of:
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+
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+```
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+docker run --rm alpine ip route | awk 'NR==1 {print $3}'
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+```
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You may also have to increase a virtual memory map count on the host system. It is required by [Elasticsearch](https://www.elastic.co/guide/en/elasticsearch/reference/current/vm-max-map-count.html).
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@@ -395,7 +399,7 @@ Add following line to `/etc/sysctl.conf`:
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vm.max_map_count=262144
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```
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-To enable Xdebug on linux, you'll also need to open port 9001 on the firewall with:
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+To enable Xdebug on Linux, you'll also need to open port 9001 on the firewall by running:
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```
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sudo iptables -A INPUT -p tcp --dport 9001 -j ACCEPT
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Mark Shust