Comment 8 for bug 1816630

@Sebastien Bacher thank you very much for looking into this issue. I don't know if it is worth tracking this further.

I just moved the /tmp directory back to the / partition, to avoid further trouble. And this actually solved the issue.

Like they did here:
https://bbs.archlinux.org/viewtopic.php?id=217072

where this was mentioned:
```
systemd[476]: systemd-timesyncd.service: Failed at step NAMESPACE spawning /usr/lib/systemd/systemd-timesyncd: Too many levels of symbolic links
systemd[1]: systemd-timesyncd.service: Main process exited, code=exited, status=226/NAMESPACE
```

I gave again full access `chmod 777 /tmp` and set the sticky flag `chmod +t /tmp`:
```
sebastian@home:/$ ll
insgesamt 1551245
drwxr-xr-x 26 root root 4096 Feb 20 21:24 ./
drwxr-xr-x 26 root root 4096 Feb 20 21:24 ../
drwxr-xr-x 2 root root 4096 Feb 19 14:28 bin/
drwxr-xr-x 5 root root 1024 Feb 19 14:28 boot/
drwxr-xr-x 2 root root 4096 Dez 13 00:54 cdrom/
drwxr-xr-x 23 root root 4660 Feb 20 21:25 dev/
drwxr-xr-x 162 root root 12288 Feb 20 19:18 etc/
drwxr-xr-x 6 root root 4096 Feb 13 20:12 home/
lrwxrwxrwx 1 root root 33 Jan 31 16:55 initrd.img -> boot/initrd.img-4.15.0-45-generic
lrwxrwxrwx 1 root root 33 Jan 31 16:55 initrd.img.old -> boot/initrd.img-4.15.0-44-generic
drwxr-xr-x 25 root root 4096 Dez 13 20:17 lib/
drwxr-xr-x 2 root root 4096 Jan 31 23:51 lib32/
drwxr-xr-x 2 root root 4096 Jul 25 2018 lib64/
drwxr-xr-x 2 root root 4096 Jan 31 23:51 libx32/
drwx------ 2 root root 16384 Dez 13 00:53 lost+found/
drwxr-xr-x 3 root root 4096 Dez 13 02:01 media/
drwxr-xr-x 2 root root 4096 Jul 25 2018 mnt/
lrwxrwxrwx 1 root root 9 Feb 13 20:02 opt -> /home/opt/
dr-xr-xr-x 298 root root 0 Feb 20 21:25 proc/
drwx------ 10 root root 4096 Jan 11 21:09 root/
drwxr-xr-x 40 root root 1320 Feb 20 21:25 run/
drwxr-xr-x 2 root root 12288 Feb 19 14:28 sbin/
drwxr-xr-x 9 root root 4096 Dez 20 18:40 snap/
drwxr-xr-x 2 root root 4096 Jul 25 2018 srv/
-rw------- 1 root root 1588346880 Dez 13 00:53 swapfile
dr-xr-xr-x 13 root root 0 Feb 20 21:25 sys/
drwxrwxrwt 16 root root 12288 Feb 20 21:27 tmp/
drwx------ 4 root root 4096 Dez 17 23:16 .Trash-0/
drwxr-xr-x 12 root root 4096 Jan 31 23:51 usr/
drwxr-xr-x 15 root root 4096 Dez 16 21:54 var/
lrwxrwxrwx 1 root root 30 Jan 31 16:55 vmlinuz -> boot/vmlinuz-4.15.0-45-generic
lrwxrwxrwx 1 root root 30 Jan 31 16:55 vmlinuz.old -> boot/vmlinuz-4.15.0-44-generic
```