Вот это часто повторяется:
Oct 30 14:00:19 wildnull sudo: pam_unix(sudo:session): session opened for user root by (uid=0)
Oct 30 14:00:19 wildnull useradd[1776]: failed adding user 'ch25566', data deleted
Oct 30 14:00:19 wildnull sudo: pam_unix(sudo:session): session closed for user root
Oct 30 14:00:19 wildnull sudo: www-data : TTY=unknown ; PWD=/home ; USER=root ; COMMAND=/bin/chown -R ch25566:ftpch /home/ch25566
Oct 30 14:00:19 wildnull sudo: pam_unix(sudo:session): session opened for user root by (uid=0)
Oct 30 14:00:19 wildnull sudo: pam_unix(sudo:session): session closed for user root
Oct 30 14:00:19 wildnull sudo: www-data : TTY=unknown ; PWD=/home ; USER=root ; COMMAND=/bin/chown www-data:ftpch /home/ch25566/server.properties
Oct 30 14:00:19 wildnull sudo: pam_unix(sudo:session): session opened for user root by (uid=0)
Oct 30 14:00:19 wildnull sudo: pam_unix(sudo:session): session closed for user root
Oct 30 14:00:19 wildnull sudo: www-data : TTY=unknown ; PWD=/home ; USER=root ; COMMAND=/bin/cp -R /home/source- /home/ch25566
Oct 30 14:00:19 wildnull sudo: pam_unix(sudo:session): session opened for user root by (uid=0)
Oct 30 14:00:19 wildnull sudo: pam_unix(sudo:session): session closed for user root
Oct 30 14:00:19 wildnull sudo: www-data : TTY=unknown ; PWD=/home ; USER=root ; COMMAND=/usr/sbin/useradd -d /home/ch25566 -g ftpch -p A4If5LvktEuCk ch25566