Linux:
To change a Nessus user’s password in Linux, run the following command:
Example: mynessususer is the username for which you want to change the password.
# /opt/nessus/sbin/nessuscli chpasswd
In the Login to change field, enter the username, and then enter the new password twice as prompted. The password will not appear on the screen as you type.
Login to change: mynessususer
New password:
New password (again):
Password changed for mynessususer
Mac OSX
Location will be
/Library/Nessus/run/sbin/nessuscli
To change a Nessus user’s password in Mac OSX, run the following command as root:
Example: mynessususer is the username for which you want to change the password.
Location to change password:
# /Library/Nessus/run/sbin/nessuscli chpasswd
In the Login to change field, enter the username, and then enter the new password twice as prompted. The password will not appear on the screen as you type.
Login to change: mynessususer
New password:
New password (again):
Password changed for mynessususer
Windows
To change a Nessus user’s password in Windows, log in to Windows with an account that has administrative privileges and run the following commands:
Example: mynessususer is the username for which you want to change the password.
cd c:\Program Files\Tenable\Nessus\
nessuscli.exe chpasswd mynessususer
In the Login to change field, enter the username, and then enter the new password twice as prompted. The password will not appear on the screen as you type.
New password:
New password (again):
Password changed for mynessususer
Helpful @Vishwa