linux payloads should default to /bin/sh

modules/payloads/singles/linux/aarch64/shell_reverse_tcp.rb

@@ -83,7 +83,7 @@ module MetasploitModule
     # Register command execution options
     register_options(
       [
-        OptString.new('SHELL', [ true, "The shell to execute.", "/system/bin/sh" ]),
+        OptString.new('SHELL', [ true, "The shell to execute.", "/bin/sh" ]),
       ])
   end
 

modules/payloads/singles/linux/armle/shell_bind_tcp.rb

@@ -112,7 +112,7 @@ module MetasploitModule
     # Register command execution options
     register_options(
       [
-        OptString.new('SHELL', [ true, "The shell to execute.", "/system/bin/sh" ]),
+        OptString.new('SHELL', [ true, "The shell to execute.", "/bin/sh" ]),
         OptString.new('ARGV0', [ false, "argv[0] to pass to execve", "sh" ]) # mostly used for busybox
       ])
   end

modules/payloads/singles/linux/armle/shell_reverse_tcp.rb

@@ -112,7 +112,7 @@ module MetasploitModule
     # Register command execution options
     register_options(
       [
-        OptString.new('SHELL', [ true, "The shell to execute.", "/system/bin/sh" ]),
+        OptString.new('SHELL', [ true, "The shell to execute.", "/bin/sh" ]),
         OptString.new('ARGV0', [ false, "argv[0] to pass to execve", "sh" ]) # mostly used for busybox
       ])
   end