kazulog@sv1:~$ cat /etc/os-release | head -2
PRETTY_NAME="Ubuntu 26.04 LTS"
NAME="Ubuntu"
kazulog@sv1:~$ sudo ls -l /srv/tftp/
total 8
-rw-r--r-- 1 root root 27 Sep 12 10:01 hello.txt
-rw-rw-rw- 1 tftp tftp 18 Sep 12 10:02 upload.txt
kazulog@sv1:~$ cat /etc/default/tftpd-hpa
# /etc/default/tftpd-hpa

TFTP_USERNAME="tftp"
TFTP_DIRECTORY="/srv/tftp"
TFTP_ADDRESS="192.168.100.10:69"
TFTP_OPTIONS="--secure --create"
kazulog@sv1:~$ sudo systemctl restart tftpd-hpa
kazulog@sv1:~$ sudo ss -ulnp 'sport = :69'
State               Recv-Q              Send-Q                            Local Address:Port                            Peer Address:Port              Process
UNCONN              0                   0                                192.168.100.10:69                                   0.0.0.0:*                  users:(("in.tftpd",pid=4631,fd=4))