Update prerequisite-system.md

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André Peters 2020-03-16 11:49:35 +01:00 committet von GitHub
Ursprung 12d1d9767f
Commit 75bdbdc7df
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GPG-SchlĂĽssel-ID: 4AEE18F83AFDEB23

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@ -31,7 +31,9 @@ ClamAV and Solr are greedy RAM munchers. You can disable them in `mailcow.conf`
Please check if any of mailcow's standard ports are open and not in use by other applications:
```
# ss -tlpn | grep -E -w '25|80|110|143|443|465|587|993|995|4190'
ss -tlpn | grep -E -w '25|80|110|143|443|465|587|993|995|4190'
# or:
netstat -tulpn | grep -E -w '25|80|110|143|443|465|587|993|995|4190'
```
!!! warning