diff --git a/2025.04.13_custom_linux_command/one_letter.sh b/2025.04.13_custom_linux_command/one_letter.sh
new file mode 100644
index 0000000..60243f0
--- /dev/null
+++ b/2025.04.13_custom_linux_command/one_letter.sh
@@ -0,0 +1,5 @@
+alias q="qstat"
+
+alias p="pbsnodes -l free"
+
+alias s="squeue"
\ No newline at end of file