I use many File manager (for some reasons) but they all have the same icon (besides Nemo), making it hard to recognize.
Is there a way to disable this so that every File mnager use it's own original icon?
The icon can be changed in the launcher file.
The launcher file can be found in
/usr/share/applications. For example, PCManFM has launcher file
pcmanfm.desktop, Thunar has
Thunar.desktop and so on.
Icon=FOOand change the icon name
FOOto other icon name of choice.
The icon name can be any icon name found in
/usr/share/icons directory. User may install an alternative icon theme that has folder icons with multiple colours.
Some alternative icon themes:
oxygen-icon-themefor all Debian, Ubuntu)
papirus-icon-themefor Debian 10+, Ubuntu 18.04+)
There is no "own original icons" for most file managers, so use different colours of folder instead.