Error writing to output file - write (28: No space left on device) [IP: 91.189.88.142 80]
Fetched 18.4 MB in 18s (1028 kB/s)                                             
Reading package lists... Error!
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/dists/bionic/universe/binary-arm64/Packages  Error writing to output file - write (28: No space left on device) [IP: 91.189.88.142 80]
 

E: Some index files failed to download. They have been ignored, or old ones used instead.
E: flAbsPath on /var/lib/dpkg/status failed - realpath (2: No such file or directory)
E: Could not open file  - open (2: No such file or directory)
E: Problem opening 
E: The package lists or status file could not be parsed or opened.
 

root@fadfdd4af58a:~# df -i
Filesystem     Inodes IUsed IFree IUse% Mounted on
/dev/root       51200  5372 45828   11% /
devtmpfs        12787   239 12548    2% /dev
tmpfs           12843     1 12842    1% /dev/shm
tmpfs           12843   285 12558    3% /run
tmpfs           12843     2 12841    1% /run/lock
 

tmpfs           12843    17 12826    1% /sys/fs/cgroup
root@fadfdd4af58a:~#