diff --git a/tools/whichcmd.sh b/tools/whichcmd.sh
new file mode 100644
index 0000000..b630b1b
--- /dev/null
+++ b/tools/whichcmd.sh
@@ -0,0 +1,15 @@
+#!/bin/env sh
+
+if [[ ${1} == "-h" ]] || [[ ${1} == "--help" ]] || [[ -z ${1} ]]; then
+  echo "
+Find available commands in PATH by input syntax.
+Usage: $(basename $0) <command syntax>
+"
+  exit 0
+fi
+
+PATHS=($(echo "${PATH}" | sed 's/:/ /g') )
+
+for p in ${PATHS[@]}; do
+  find "${p}" -iname "*${1}*"
+done