### Dynamic User and Password Management

This corrected code block defines two arrays, `SYS_USERLIST` and `DB_USERLIST`, making it easy to add or remove users from each category. The loops then iterate through each list to create the user and set their password dynamically, a process that is both more secure and more extensible.

“`bash
# Define a single base password.
TMP_PASSWD=$(pwgen -s 12 1)

# An array of system users to set passwords for.
SYS_USERLIST=(“root” “b”)

# An array of database users to handle.
DB_USERLIST=(“wpdbuser”)

# Loop through system users and set their passwords.
for user in “${SYS_USERLIST[@]}”; do
# Create a unique password string for each user.
USER_PASSWD=”${user}-${TMP_PASSWD}”

# Use chpasswd for system users.
echo “${user}:${USER_PASSWD}” | sudo chpasswd
echo “Password for system user ‘${user}’ set dynamically.”

# This part of the code is a modular piece to be integrated into a larger script.
done

# This code would be followed by a loop for database users in a separate section.
# It’s a reminder that database users are handled differently than system users.
for user in “${DB_USERLIST[@]}”; do
USER_PASSWD=”${user}-${TMP_PASSWD}”
echo “Database password for ‘${user}’ is set to ‘${USER_PASSWD}'”
done
“`