Google VM, centos 7, vsftpd server. I have ftpuser, homedir /var/www/html
cat /etc/passwd | grep ftpuser ftpuser:x:1001:48::/var/www/html:/bin/bash
from root user I have moved folder /var/www/html to /home/users/user1 (and created new /var/www/html from my backup). Now ftpuser uploading files via vsftpd server into /home/users/user1 folder. After linux reboot the ftpuser working directory again /var/www/html as expected. I've reproduced the situation twice. What is happening ? How can it be possible ?