diff --git a/monkey/infection_monkey/post_breach/actions/modify_shell_startup_files.py b/monkey/infection_monkey/post_breach/actions/modify_shell_startup_files.py
index 8417849db..09063fa2d 100644
--- a/monkey/infection_monkey/post_breach/actions/modify_shell_startup_files.py
+++ b/monkey/infection_monkey/post_breach/actions/modify_shell_startup_files.py
@@ -37,6 +37,3 @@ class ModifyShellStartupFile(PBA):
         super(ModifyShellStartupFile, self).__init__(name=POST_BREACH_SHELL_STARTUP_FILE_MODIFICATION,
                                                      linux_cmd=linux_cmds,
                                                      windows_cmd=windows_cmds)
-
-    def run(self):
-        super(ModifyShellStartupFile, self).run()
diff --git a/monkey/infection_monkey/post_breach/shell_startup_files/linux/shell_startup_files_modification.py b/monkey/infection_monkey/post_breach/shell_startup_files/linux/shell_startup_files_modification.py
index 745caf6c8..552904506 100644
--- a/monkey/infection_monkey/post_breach/shell_startup_files/linux/shell_startup_files_modification.py
+++ b/monkey/infection_monkey/post_breach/shell_startup_files/linux/shell_startup_files_modification.py
@@ -11,11 +11,9 @@ STARTUP_FILES = [
 
 def get_linux_commands_to_modify_shell_startup_files():
     return [
-        'echo \"# Succesfully modified {0}\"',
-        '3<{0} 3<&- |',  # check for existence of file
-        'tee -a',  # append to file
-        '{0}',
-        '&&',
-        'sed -i \'$d\' {0}',  # remove last line of file
+        '3<{0} 3<&- &&',  # check for existence of file
+        'echo \"# Succesfully modified {0}\" |',
+        'tee -a {0} &&',  # append to file
+        'sed -i \'$d\' {0}',  # remove last line of file (undo changes)
     ],\
      STARTUP_FILES