Install Seafile-cli client on Raspberry Pi

I don’t know, I’ve never used the command line client standalone before.
Are you sure there is no logging in ~/.ccnet?

There are some environment variables that you can set to enable more debugging output, maybe that helps.
https://manual.seafile.com/faq/client.html

i tried it once again. Purged everything before.

pi@raspberrypikitchen:~ $ sudo apt-get -t stretch-backports install "seafile-cli"
Paketlisten werden gelesen... Fertig
Abhängigkeitsbaum wird aufgebaut.
Statusinformationen werden eingelesen.... Fertig
The following additional packages will be installed:
  ccnet libccnet0 libjansson4 libsearpc1 python-seafile seafile-daemon
Die folgenden NEUEN Pakete werden installiert:
  ccnet libccnet0 libjansson4 libsearpc1 python-seafile seafile-cli seafile-daemon
0 aktualisiert, 7 neu installiert, 0 zu entfernen und 57 nicht aktualisiert.
Es müssen 343 kB an Archiven heruntergeladen werden.
Nach dieser Operation werden 895 kB Plattenplatz zusätzlich benutzt.
Möchten Sie fortfahren? [J/n] j

<snip>

pi@raspberrypikitchen:~ $ export SEAFILE_DEBUG=all
pi@raspberrypikitchen:~ $ seaf-cli init -d ~/seafile-cli
Failed to init ccnet
pi@raspberrypikitchen:~ $ cd ~/.ccnet
-bash: cd: /home/pi/.ccnet: Datei oder Verzeichnis nicht gefunden

So - as far as i see there is no logging until ccnet is startet :confused:

Are there official backports for Raspbian?

Of, course, you can add debian-backports to your raspbian os, as debian provides arm binaries. But this is not official, cause raspbian is more like “the shitty ubuntu” from the foundation.