Update prerequisite-system.md

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Peter 2021-02-13 21:38:03 +01:00 committet von GitHub
Ursprung a68fc8d0b8
Commit fa46f74de1
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GPG-SchlĂĽssel-ID: 4AEE18F83AFDEB23

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@ -44,9 +44,9 @@ We can help to correctly plan your setup as part of our support.
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|5222|5269'
ss -tlpn | grep -E -w '25|80|110|143|443|465|587|993|995|4190|5222|5269|5443'
# or:
netstat -tulpn | grep -E -w '25|80|110|143|443|465|587|993|995|4190|5222|5269'
netstat -tulpn | grep -E -w '25|80|110|143|443|465|587|993|995|4190|5222|5269|5443'
```
!!! warning