diff --git a/config.nu b/config.nu
index 20b82eb..ab9f95e 100644
--- a/config.nu
+++ b/config.nu
@@ -17,13 +17,51 @@
 # You can remove these comments if you want or leave
 # them for future reference.
 
-# you have to oh-my-posh init nu --config <path to theme>
-# after that you can -->
-source ~/.oh-my-posh.nu
+# ╭─────────────────────────────────────────────────────╮
+# │ Define a helper function to check command existence │
+# ╰─────────────────────────────────────────────────────╯
+def command_exists [cmd: string] {
+     not (which $cmd | is-empty)
+}
 
-# you have to zoxide init nushell | safe -f ~/.zoxide.nu
-# after that you can -->
-source ~/.zoxide.nu
+# ╭───────────────────────────╮
+# │ oh-my-posh initialistaion │
+# ╰───────────────────────────╯
+if (command_exists oh-my-posh) {
+  if ($"~/.oh-my-posh.nu" | path exists) == true {
+    source ~/.oh-my-posh.nu
+  }
+}
+
+# ╭───────────────────────╮
+# │ zoxide initialistaion │
+# ╰───────────────────────╯
+if (command_exists zoxide) {
+  if ($"~/.zoxide.nu" | path exists) {
+    source ~/.zoxide.nu
+  } else {
+    zoxide init nushell | save -f ~/.zoxide.nu
+    source ~/.zoxide.nu
+  }
+}
+
+alias untar = tar -xf
+alias .. = cd ..
+alias www = curl wttr.in/Ulm
+alias ip = ip --color=always
+
+if (command_exists git) {
+  alias g = git
+  alias gs = git status -sb
+  alias gsl = git status
+  # alias gm = git checkout main ; git merge
+  alias gc = git clone --recurse-submodule
+  alias gd = git diff
+  # alias gp = git submodule update --init --recursive ; git pull --recurse-submodule
+  # alias gsu = git submodule foreach git pull ; git submodule update --init --recursive ; git add . ; git commit -m ' update: submodules' ; echo '-- Committed changes, pushing now..' ; sleep 0.3 ; git push
+  alias gcm = git commit -m
+  alias gpu = git push --recurse-submodule=on-demand
+}
 
 $env.config.history.file_format = "sqlite"
 $env.config.history.max_size = 5_000_000