GIMP (GNU Image Manipulation Tool)

You can install GIMP to fulfill all your image editing needs as follows-

The following instructions assume that you're inside your distro's shell and not using Termux's shell for this.

Please find your distro and run the command in its shell-

Ubuntu/ Debian based distributions-

sudo apt-get update
sudo apt-get install gimp

Arch Linux based distributions-

sudo pacman -Syu
pacman -Syu gimp

Fedora based distributions-

sudo dnf update
sudo dnf install gimp