--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/docker_legacy/base/scripts/add_host	Fri Jan 01 18:33:52 2021 +0100
@@ -0,0 +1,18 @@
+#!/usr/bin/env python2
+# this script add aliases to /etc/hosts
+import sys, re
+
+if len(sys.argv) < 2 or len(sys.argv) > 3:
+    sys.exit(1)
+
+host = sys.argv[1]
+alias = sys.argv[2] if len(sys.argv) == 3 else "localhost"
+
+if host == "localhost" or host == alias:
+    sys.exit(0)
+
+print "Adding host {} as an alias of {}".format(host, alias)
+with open("/etc/hosts", "r+") as f:
+    buf = re.sub(r"\b{}\b".format(alias), "{}\t{}".format(alias, host), f.read(), 1)
+    f.seek(0)
+    f.write(buf)