If ftp is active on the system, the file /etc/ftpusers is a deny list used by ftp daemon containing a list of users who are not allowed to access the system via ftp. Rationale: The /etc/ftpusers file contains a list of users who are not allowed to access the system via ftp. All users with a UID less than 200 should typically be added into the file.
Solution
List all users with a UID less than 200 to the /etc/ftpusers file: lsuser -c ALL | grep -v ^#name |grep -v root | cut -f1 -d: | while read NAME; do if [ 'lsuser -f $NAME | grep id | cut -f2 -d=' -lt 200 ] > /dev/null 2>&1; then echo 'Would add $NAME to /etc/ftpusers' fi done NOTE: Review the list of users Add all relevant users with a UID of less that 200 to the /etc/ftpusers file: lsuser -c ALL | grep -v ^#name |grep -v root | cut -f1 -d: | while read NAME; do if [ 'lsuser -f $NAME | grep id | cut -f2 -d=' -lt 200 ] > /dev/null 2>&1; then echo $NAME >> /etc/ftpusers fi done Default Value: N/A Additional Information: Reversion: Edit /etc/ftpusers and leave only the root entry: vi /etc/ftpusers