kazulog@sv1:~$ cat /etc/os-release | head -2
PRETTY_NAME="Ubuntu 26.04 LTS"
NAME="Ubuntu"
kazulog@sv1:~$ sudo ls -l /home/ftpdemo/
total 8
-rw-r--r-- 1 ftpdemo ftpdemo 26 Sep 12 10:16 hello.txt
-rw------- 1 ftpdemo ftpdemo 18 Sep 12 10:20 upload.txt
kazulog@sv1:~$ grep -n 'write_enable\|local_umask' /etc/vsftpd.conf
31:write_enable=YES
35:local_umask=022
44:#anon_mkdir_write_enable=YES
kazulog@sv1:~$ sudo systemctl restart vsftpd