fix - resolve bash by absolute path

airflow/operators/bash.py

@@ -16,6 +16,7 @@
 # specific language governing permissions and limitations
 # under the License.
 import os
+import shutil
 from typing import Dict, Optional, Sequence
 
 from airflow.compat.functools import cached_property
@@ -174,14 +175,15 @@ def get_env(self, context):
         return env
 
     def execute(self, context: Context):
+        bash_path = shutil.which("bash") or "bash"
         if self.cwd is not None:
             if not os.path.exists(self.cwd):
                 raise AirflowException(f"Can not find the cwd: {self.cwd}")
             if not os.path.isdir(self.cwd):
                 raise AirflowException(f"The cwd {self.cwd} must be a directory")
         env = self.get_env(context)
         result = self.subprocess_hook.run_command(
-            command=['bash', '-c', self.bash_command],
+            command=[bash_path, '-c', self.bash_command],
             env=env,
             output_encoding=self.output_encoding,
             cwd=self.cwd,