feat: add dummy test for linux

.github/workflows/github-actions.yml

@@ -20,3 +20,12 @@ jobs:
         uses: actions/checkout@main
       - name: lint files against shfmt
         run: make lint_shfmt
+  test-setup-linux:
+    runs-on: ubuntu-latest
+    steps:
+      - name: install soft
+        run: sudo apt install -y tmux git
+      - name: checkout repo
+        uses: actions/checkout@main
+      - name: test setup
+        run: ./tests/linux_setup_plugin_and_run.sh

tests/linux_setup_plugin_and_run.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+# this test is meant to run on linux
+#
+# test target is:
+# - ubuntu 20.04 LTS
+# - bash
+
+main() {
+  if [[ "$(uname)" != "Linux" ]]; then
+      echo "NOT LINUX. Failed & exit."
+      exit 1
+  fi
+
+  sudo apt update -y
+  sudo apt install -y tmux git
+
+  git clone https://github.com/tmux-plugins/tpm ~/.tmux/plugins/tpm
+
+  cat << EOF | tee ~/.tmux.conf
+# List of plugins
+set -g @plugin 'tmux-plugins/tpm'
+set -g @plugin 'tmux-plugins/tmux-sensible'
+
+# Other plugins
+set -g @plugin 'egel/tmux-gruvbox'
+set -g @tmux-gruvbox 'dark'
+EOF
+
+  tmux source ~/.tmux.conf
+}
+
+main "$@"