This is a linux tutorial as I don't use windows, but it should be similar for macos.

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1. install golang:

sudo pacman -S go

i am using artixlinux, To find the package for your distro, use this

2. clone the repository:

git clone https://git.aba.lol/aba/ssh-manager

3. change to the directory and run:

go build -o ssh-manager

4. finally, add the exeutable to the bin folder:

cp ssh-manager /usr/bin

that's it now you can use the tool