added instructions on existing repo

README.md

@@ -49,6 +49,18 @@ dotf remote add origin <username>@git.domain.tld/dotfiles.git
 dotf push
 ```
 
+# Adding new computer to existing dotfile repo
+```
+mkdir $HOME/.dotfiles
+alias dotf='/usr/bin/git --git-dir=$HOME/.dotfiles --work-tree=$HOME'
+dotf init
+rm .inputrc
+rm .bashrc
+git remote add origin https://git.rre.nu/jonas/dotfiles.git
+dotf fetch origin
+dotf checkout main
+```
+
 # To initialize my desktop run
 ```bash
 bash <(curl -sL https://git.rre.nu/jonas/dotfiles/raw/branch/master/bin/initDesktop)