diff --git a/wo/core/acme.py b/wo/core/acme.py
index 86de29e..dcc1944 100644
--- a/wo/core/acme.py
+++ b/wo/core/acme.py
@@ -51,11 +51,14 @@ class WOAcme:
         """Export acme.sh csv certificate list"""
         # check acme.sh is installed
         WOAcme.check_acme(self)
-        if not WOShellExec.cmd_exec(
-                self, "{0} ".format(WOAcme.wo_acme_exec) +
-                "--list --listraw > /var/lib/wo/cert.csv"):
+        acme_list = WOShellExec.cmd_exec_stdout(
+            self, "{0} ".format(WOAcme.wo_acme_exec) +
+            "--list --listraw")
+        if acme_list:
+            WOFileUtils.textwrite(self, '/var/lib/wo/cert.csv', acme_list)
+            WOFileUtils.chmod(self, '/var/lib/wo/cert.csv', 0o600)
+        else:
             Log.error(self, "Unable to export certs list")
-        WOFileUtils.chmod(self, '/var/lib/wo/cert.csv', 0o600)
 
     def setupletsencrypt(self, acme_domains, acmedata):
         """Issue SSL certificates with acme.sh"""
diff --git a/wo/core/fileutils.py b/wo/core/fileutils.py
index f6011da..92d45bf 100644
--- a/wo/core/fileutils.py
+++ b/wo/core/fileutils.py
@@ -386,27 +386,3 @@ class WOFileUtils():
                 return True
             else:
                 return False
-
-    def convertFileBestGuess(self, filename, filepath):
-        """Convert file to utf-8"""
-        sourceFormats = ['ascii', 'iso-8859-1']
-        for format in sourceFormats:
-            try:
-                os.chdir(filepath)
-                with codecs.open(filename, 'rU', format) as sourceFile:
-                    with codecs.open(
-                        'tmp' + '/' + sourceFile, 'w', 'utf-8') as targetFile:
-                        for line in sourceFile:
-                            targetFile.write(line)
-                    return
-            except UnicodeDecodeError:
-                pass
-        if os.path.exists("/tmp/{0}".format(filename)):
-            try:
-                self.rm(filepath + filename)
-                self.mvfile("/tmp/{0}".format(filename), filepath + filename)
-            except Exception as e:
-                Log.debug(self, "{0}".format(e))
-                Log.error(
-                    self,
-                    "Unable to move file : {0} ".format(filepath + filename))