Open Terminal and enter 'sudo visudo" to edit /etc/sudoers.tmp file. This will let you do things in Linux without having to enter a password. This was done in Linux Mint and this may be different for another Distro, but it works. To close and save with visudo, you do a ctrl+x and choose Y to save.
Applications like gparted and synaptic can also be made to open without a password by opening their properties and editing the command line. gparted would be sudo gparted, and synaptic would be sudo synaptic-pkexec.
This would have to done after the /etc/sudoers.tmp file has been edited.
I would also recommend installing Timeshift for setting a restore point before doing anything.
https://www.youtube.com/watch?v=FRNEm4ANhJo

A couple of videos that are worth watching.
Say what you want but I have greatly reduced my PW Prompts.
I might add that one has to look for and edit the lines that have ALL=(ALL:ALL) All
I added the bottom line first with the username of the OS and did a ctrl+x and save, this let me use the command line without a PW
I then edited each line that contained ALL=(ALL:ALL) ALL with
ALL=(ALL:ALL) NOPASSWD: ALL. Do one line at a time and do the ctrl+x and save, that way if you have an error you can close and start over.