Hi Stefan, thank you for your advice.
I tried again:
I downloaded the newest file lineage-15.1-20180925-nightly-FP2-signed.zip to my Linux laptop.
I verified the checksum using sha256sum lineage-15.1-20180925-nightly-FP2-signed.zip
I copied the file to my Fairphone 2 using:
sudo adb push lineage-15.1-20180925-nightly-FP2-signed.zip /sdcard/
I rebooted the smartphone and launched TWRP 3.0.2-0 using:
sudo adb reboot recovery
I wiped Data, cache and Dalvik.
Then I tried to install the new lingeage version lineage-15.1-20180925-nightly-FP2-signed.zip without rebooting.
So far without success:
Updating partition details…
…done
Full SELinux support is present.
MTP Enabled
Wiping Dalvik Cache Directories…
Cleaned: /data/dalvik-cache…
– Dalvik Cache Directories Wipe Complete!
Formatting Cache using /data/media
Done.
Updating partition details…
…done
Installing zip file ‘/sdcard/lineage-15.1-20180925-nightly-FP2-signed.zip’
Checking for MD5 file…
Skipping MD5 check: no MD5 file found
Warning: No file_contexts
E3004: This package is for device: FP2; this device is .
E:unknown command [log]
Updater process ended with ERROR: 7
Error installing zip file ‘/sdcard/lineage-15.1-20180925-nightly-FP2-signed.zip’
Updating partition details…
…done
Then I tried to wipe the System partition as well.
Then I wiped system
The log was:
Updating partition details…
…done
Then I triedlineage-15.1-20180925-nightly-FP2-signed.zip,but the error was the same again.
In the end I wiped everything exceptSDCard, but also the instalation was without success.