Update prerequisites.md
Add a new line after COMMIT to avoid "Bad argument" error.
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@ -62,7 +62,7 @@ First, install iptables-persistent. During installation it will ask you if you w
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apt install -y iptables-persistent
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```
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Edit `/etc/iptables/rules.v4` and put this inside:
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Edit `/etc/iptables/rules.v4` and put this inside: (There must to be a new line after COMMIT, or it will get an error message ```Bad argument `COMMIT'``` at next step.)
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```text
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*filter
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@ -99,6 +99,7 @@ Edit `/etc/iptables/rules.v4` and put this inside:
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-A FORWARD -j REJECT
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COMMIT
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```
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With iptables-persistent, that configuration will be loaded at boot time. But since we are not rebooting right now, we need to load it manually for the first time:
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@ -140,6 +141,7 @@ If your server is also reachable over IPv6, edit `/etc/iptables/rules.v6` and ad
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-A FORWARD -j REJECT
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COMMIT
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```
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Similar to the IPv4 rules, you can load it manually like this:
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```bash
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