diff --git a/devops-service/lib/executors/server_executor.rb b/devops-service/lib/executors/server_executor.rb
index 7ff7fdc..0518211 100644
--- a/devops-service/lib/executors/server_executor.rb
+++ b/devops-service/lib/executors/server_executor.rb
@@ -2,6 +2,7 @@ require "lib/knife/knife_factory"
 require "workers/worker"
 require "workers/delete_server_worker"
 require "hooks"
+require 'net/ssh'
 
 module Devops
   module Executor
@@ -312,15 +313,26 @@ module Devops
         res = delete_from_chef_server(@server.chef_node_name)
         begin
           new_name = "/etc/chef.backup_#{Time.now.strftime("%d-%m-%Y_%H.%M.%S")}"
-#          r = `ssh -i #{cert_path} -q #{@server.remote_user}@#{@server.private_ip} rm -Rf /etc/chef`
-          cmd = "ssh -i #{cert_path} -q #{@server.remote_user}@#{@server.private_ip} \"/bin/sh -c 'if [[ -d /etc/chef ]]; then mv /etc/chef #{new_name}; else echo not found; fi'\""
-          DevopsLogger.logger.info("Trying to run command '#{cmd}'")
-          r = `#{cmd}`.strip
-          if r == 'not found'
-            res[:server] = "Directory '/etc/chef' does not exists"
-          else
-            raise(r) unless $?.success?
-            res[:server] = "'/etc/chef' renamed to '#{new_name}'"
+          cmd = (@server.remote_user == 'root' ? "" : "sudo ")
+          cmd = cmd + "/bin/sh -c 'if [[ -d /etc/chef ]]; then mv /etc/chef #{new_name} && echo ok; else echo not found; fi'"
+          DevopsLogger.logger.info("SSH: trying to run command '#{cmd}'")
+          Net::SSH.start(@server.private_ip, @server.remote_user, :keys => [cert_path]) do |session|
+            session.open_channel do |channel|
+              channel.request_pty(:modes => { Net::SSH::Connection::Term::ECHO => 0 }) do |c, success|
+                raise "could not request pty" unless success
+                channel.exec cmd
+                channel.on_data do |c_, data|
+                  if data == 'not found'
+                    res[:server] = "Directory '/etc/chef' does not exists"
+                  elsif data == 'ok'
+                    res[:server] = "'/etc/chef' renamed to '#{new_name}'"
+                  else
+                    DevopsLogger.logger.error "Unexpected error: " + data
+                    raise(data)
+                  end
+                end
+              end
+            end
           end
         rescue => e
           DevopsLogger.logger.error "Unbootstrap error: " + e.message