diff --git a/nselib/ajp.lua b/nselib/ajp.lua
index 26a3ade9f..b6073a4bc 100644
--- a/nselib/ajp.lua
+++ b/nselib/ajp.lua
@@ -3,7 +3,6 @@ local bin = require "bin"
 local http = require "http"
 local match = require "match"
 local nmap = require "nmap"
-local package = require "package"
 local stdnse = require "stdnse"
 local table = require "table"
 local url = require "url"
diff --git a/nselib/amqp.lua b/nselib/amqp.lua
index 836847cb7..84208a4f3 100644
--- a/nselib/amqp.lua
+++ b/nselib/amqp.lua
@@ -25,7 +25,6 @@ local bin = require "bin"
 local match = require "match"
 local nmap = require "nmap"
 local stdnse = require "stdnse"
-local string = require "string"
 local table = require "table"
 _ENV = stdnse.module("amqp", stdnse.seeall);
 
diff --git a/nselib/anyconnect.lua b/nselib/anyconnect.lua
index ea57f0ef1..912aa6e6f 100644
--- a/nselib/anyconnect.lua
+++ b/nselib/anyconnect.lua
@@ -14,7 +14,6 @@ local url = require('url')
 local math = require('math')
 local table = require('table')
 local os = require('os')
-local string = require('string')
 
 local args_group= stdnse.get_script_args('anyconnect.group') or "VPN"
 local args_mac= stdnse.get_script_args('anyconnect.mac')
diff --git a/nselib/bittorrent.lua b/nselib/bittorrent.lua
index 930e93781..b1c37f0de 100644
--- a/nselib/bittorrent.lua
+++ b/nselib/bittorrent.lua
@@ -93,7 +93,6 @@ local bit = require "bit"
 local coroutine = require "coroutine"
 local http = require "http"
 local io = require "io"
-local math = require "math"
 local nmap = require "nmap"
 local openssl = require "openssl"
 local os = require "os"
diff --git a/nselib/bjnp.lua b/nselib/bjnp.lua
index a7f76e876..d1041b0af 100644
--- a/nselib/bjnp.lua
+++ b/nselib/bjnp.lua
@@ -9,11 +9,9 @@
 --
 
 local bin = require("bin")
-local bit = require("bin")
 local nmap = require("nmap")
 local os = require("os")
 local stdnse = require("stdnse")
-local string = require("string")
 local table = require("table")
 
 _ENV = stdnse.module("bjnp", stdnse.seeall)
diff --git a/nselib/cassandra.lua b/nselib/cassandra.lua
index fd9ef2f7d..03ad22590 100644
--- a/nselib/cassandra.lua
+++ b/nselib/cassandra.lua
@@ -11,7 +11,6 @@ local bin = require "bin"
 local nmap = require "nmap"
 local stdnse = require "stdnse"
 local string = require "string"
-local table = require "table"
 _ENV = stdnse.module("cassandra", stdnse.seeall)
 
 --[[
diff --git a/nselib/dnsbl.lua b/nselib/dnsbl.lua
index 589af268e..8656607bf 100644
--- a/nselib/dnsbl.lua
+++ b/nselib/dnsbl.lua
@@ -24,7 +24,6 @@ local dns = require "dns"
 local ipOps = require "ipOps"
 local nmap = require "nmap"
 local stdnse = require "stdnse"
-local string = require "string"
 local table = require "table"
 _ENV = stdnse.module("dnsbl", stdnse.seeall)
 
diff --git a/nselib/eap.lua b/nselib/eap.lua
index 2684c3f90..706c0ec6f 100644
--- a/nselib/eap.lua
+++ b/nselib/eap.lua
@@ -34,7 +34,6 @@
 local bin = require "bin"
 local math = require "math"
 local nmap = require "nmap"
-local package = require "package"
 local packet = require "packet"
 local stdnse = require "stdnse"
 _ENV = stdnse.module("eap", stdnse.seeall)
diff --git a/nselib/gps.lua b/nselib/gps.lua
index 73ab217b7..beec2101a 100644
--- a/nselib/gps.lua
+++ b/nselib/gps.lua
@@ -1,6 +1,5 @@
 local bit = require "bit"
 local os = require "os"
-local package = require "package"
 local stdnse = require "stdnse"
 local string = require "string"
 _ENV = stdnse.module("gps", stdnse.seeall)
diff --git a/nselib/ike.lua b/nselib/ike.lua
index a054adc94..696195c62 100644
--- a/nselib/ike.lua
+++ b/nselib/ike.lua
@@ -4,8 +4,6 @@ local nmap = require "nmap"
 local stdnse = require "stdnse"
 local string = require "string"
 local table = require "table"
-local math = require "math"
-local io = require "io"
 
 
 description = [[
diff --git a/nselib/ipp.lua b/nselib/ipp.lua
index 4ab118036..acb0f8b9e 100644
--- a/nselib/ipp.lua
+++ b/nselib/ipp.lua
@@ -2,7 +2,6 @@ local bin = require "bin"
 local http = require "http"
 local nmap = require "nmap"
 local os = require "os"
-local package = require "package"
 local stdnse = require "stdnse"
 local tab = require "tab"
 local table = require "table"
diff --git a/nselib/isns.lua b/nselib/isns.lua
index 0e018c1ce..b0042b18e 100644
--- a/nselib/isns.lua
+++ b/nselib/isns.lua
@@ -5,12 +5,10 @@
 --
 
 local bin    = require('bin')
-local bit    = require('bit')
 local ipops  = require('ipOps')
 local match  = require('match')
 local nmap = require('nmap')
 local stdnse = require('stdnse')
-local tab    = require('tab')
 local table = require('table')
 _ENV = stdnse.module("isns", stdnse.seeall);
 
diff --git a/nselib/mobileme.lua b/nselib/mobileme.lua
index 4c6c8dd24..eddce6961 100644
--- a/nselib/mobileme.lua
+++ b/nselib/mobileme.lua
@@ -1,6 +1,5 @@
 local http = require "http"
 local json = require "json"
-local package = require "package"
 local stdnse = require "stdnse"
 local table = require "table"
 _ENV = stdnse.module("mobileme", stdnse.seeall)
diff --git a/nselib/sip.lua b/nselib/sip.lua
index 71a9b122f..971b17d6e 100644
--- a/nselib/sip.lua
+++ b/nselib/sip.lua
@@ -37,7 +37,6 @@
 -- Created 2011/03/30 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
 
 local bin = require "bin"
-local math = require "math"
 local nmap = require "nmap"
 local os = require "os"
 local stdnse = require "stdnse"
diff --git a/nselib/stun.lua b/nselib/stun.lua
index 5143d85eb..772c86cf3 100644
--- a/nselib/stun.lua
+++ b/nselib/stun.lua
@@ -11,7 +11,6 @@ local ipOps = require "ipOps"
 local match = require "match"
 local math = require "math"
 local nmap = require "nmap"
-local package = require "package"
 local stdnse = require "stdnse"
 local string = require "string"
 local table = require "table"
diff --git a/nselib/versant.lua b/nselib/versant.lua
index c1626cf5c..e1033643b 100644
--- a/nselib/versant.lua
+++ b/nselib/versant.lua
@@ -12,7 +12,6 @@ local stdnse = require "stdnse"
 local bin = require "bin"
 local match = require "match"
 local nmap = require "nmap"
-local package = require "package"
 local string = require "string"
 local table = require "table"
 _ENV = stdnse.module("versant", stdnse.seeall)
diff --git a/scripts/afp-serverinfo.nse b/scripts/afp-serverinfo.nse
index 1a0d7c9d3..5ad82e9a9 100644
--- a/scripts/afp-serverinfo.nse
+++ b/scripts/afp-serverinfo.nse
@@ -2,7 +2,6 @@ local afp = require "afp"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local string = require "string"
 local table = require "table"
 
 description = [[
diff --git a/scripts/broadcast-ataoe-discover.nse b/scripts/broadcast-ataoe-discover.nse
index 6f9eed97f..5037a03df 100644
--- a/scripts/broadcast-ataoe-discover.nse
+++ b/scripts/broadcast-ataoe-discover.nse
@@ -4,7 +4,6 @@ local math = require "math"
 local nmap = require "nmap"
 local packet = require "packet"
 local stdnse = require "stdnse"
-local string = require "string"
 local table = require "table"
 
 description = [[
diff --git a/scripts/broadcast-ping.nse b/scripts/broadcast-ping.nse
index 2580e53fd..391d6c85b 100644
--- a/scripts/broadcast-ping.nse
+++ b/scripts/broadcast-ping.nse
@@ -4,7 +4,6 @@ local ipOps = require "ipOps"
 local nmap = require "nmap"
 local packet = require "packet"
 local stdnse = require "stdnse"
-local string = require "string"
 local tab = require "tab"
 local table = require "table"
 local target = require "target"
diff --git a/scripts/broadcast-versant-locate.nse b/scripts/broadcast-versant-locate.nse
index e096d442f..29c28dc99 100644
--- a/scripts/broadcast-versant-locate.nse
+++ b/scripts/broadcast-versant-locate.nse
@@ -1,5 +1,4 @@
 local srvloc = require "srvloc"
-local stdnse = require "stdnse"
 local table = require "table"
 
 description = [[
diff --git a/scripts/cassandra-info.nse b/scripts/cassandra-info.nse
index cea03fc1b..54ebc5e36 100644
--- a/scripts/cassandra-info.nse
+++ b/scripts/cassandra-info.nse
@@ -2,7 +2,6 @@ local creds = require "creds"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local table = require "table"
 
 local cassandra = stdnse.silent_require "cassandra"
 
diff --git a/scripts/dns-nsec3-enum.nse b/scripts/dns-nsec3-enum.nse
index 76c241884..44609acf5 100644
--- a/scripts/dns-nsec3-enum.nse
+++ b/scripts/dns-nsec3-enum.nse
@@ -2,8 +2,6 @@ local stdnse = require "stdnse"
 local shortport = require "shortport"
 local dns = require "dns"
 local base32 = require "base32"
-local msrpc = require "msrpc" -- just for random string generation
-local math = require "math"
 local bin = require "bin"
 local nmap = require "nmap"
 local string = require "string"
diff --git a/scripts/dns-nsid.nse b/scripts/dns-nsid.nse
index 96ae11e1d..589241699 100644
--- a/scripts/dns-nsid.nse
+++ b/scripts/dns-nsid.nse
@@ -4,7 +4,6 @@ local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
 local string = require "string"
-local table = require "table"
 
 description = [[
 Retrieves information from a DNS nameserver by requesting
diff --git a/scripts/enip-info.nse b/scripts/enip-info.nse
index e8f68b625..6f5d03b00 100644
--- a/scripts/enip-info.nse
+++ b/scripts/enip-info.nse
@@ -4,7 +4,6 @@ local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
 local string = require "string"
-local table = require "table"
 
 description = [[
 This NSE script is used to send a EtherNet/IP packet to a remote device that
diff --git a/scripts/flume-master-info.nse b/scripts/flume-master-info.nse
index db84b2479..6723142a7 100644
--- a/scripts/flume-master-info.nse
+++ b/scripts/flume-master-info.nse
@@ -3,7 +3,6 @@ local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
 local string = require "string"
-local table = require "table"
 local target = require "target"
 
 description = [[
diff --git a/scripts/giop-info.nse b/scripts/giop-info.nse
index f9d85153c..0a8cddc30 100644
--- a/scripts/giop-info.nse
+++ b/scripts/giop-info.nse
@@ -1,7 +1,5 @@
 local giop = require "giop"
 local shortport = require "shortport"
-local stdnse = require "stdnse"
-local table = require "table"
 
 description = [[
 Queries a CORBA naming server for a list of objects.
diff --git a/scripts/hadoop-datanode-info.nse b/scripts/hadoop-datanode-info.nse
index 34864fd1e..59f025f6f 100644
--- a/scripts/hadoop-datanode-info.nse
+++ b/scripts/hadoop-datanode-info.nse
@@ -2,7 +2,6 @@ local http = require "http"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local table = require "table"
 
 description = [[
 Discovers information such as log directories from an Apache Hadoop DataNode HTTP status page.
diff --git a/scripts/hadoop-tasktracker-info.nse b/scripts/hadoop-tasktracker-info.nse
index a880ea807..fd5302f62 100644
--- a/scripts/hadoop-tasktracker-info.nse
+++ b/scripts/hadoop-tasktracker-info.nse
@@ -2,7 +2,6 @@ local http = require "http"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local table = require "table"
 
 description = [[
 Retrieves information from an Apache Hadoop TaskTracker HTTP status page.
diff --git a/scripts/hbase-region-info.nse b/scripts/hbase-region-info.nse
index eeccb03ff..d72d1af5d 100644
--- a/scripts/hbase-region-info.nse
+++ b/scripts/hbase-region-info.nse
@@ -2,7 +2,6 @@ local http = require "http"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local table = require "table"
 local target = require "target"
 
 description = [[
diff --git a/scripts/http-adobe-coldfusion-apsa1301.nse b/scripts/http-adobe-coldfusion-apsa1301.nse
index 8b1b5154d..c42ead1da 100644
--- a/scripts/http-adobe-coldfusion-apsa1301.nse
+++ b/scripts/http-adobe-coldfusion-apsa1301.nse
@@ -23,7 +23,6 @@ categories = {"exploit", "vuln"}
 local http = require "http"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local string = require "string"
 local url = require "url"
 
 portrule = shortport.http
diff --git a/scripts/http-devframework.nse b/scripts/http-devframework.nse
index 5f3c41b70..7fabf6ef2 100644
--- a/scripts/http-devframework.nse
+++ b/scripts/http-devframework.nse
@@ -44,8 +44,6 @@ license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local table = require "table"
-local string = require "string"
 local httpspider = require "httpspider"
 local _G = require "_G"
 
diff --git a/scripts/http-errors.nse b/scripts/http-errors.nse
index 326e9f625..11332bbb4 100644
--- a/scripts/http-errors.nse
+++ b/scripts/http-errors.nse
@@ -40,7 +40,6 @@ license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
 local table = require "table"
-local string = require "string"
 local httpspider = require "httpspider"
 
 portrule = shortport.port_or_service( {80, 443}, {"http", "https"}, "tcp", "open")
diff --git a/scripts/http-git.nse b/scripts/http-git.nse
index d4dfc015a..bae0f81ef 100644
--- a/scripts/http-git.nse
+++ b/scripts/http-git.nse
@@ -1,7 +1,6 @@
 local http = require("http")
 local shortport = require("shortport")
 local stdnse = require("stdnse")
-local strbuf = require("strbuf")
 local string = require("string")
 local table = require("table")
 
diff --git a/scripts/http-mobileversion-checker.nse b/scripts/http-mobileversion-checker.nse
index 213771d0d..49a66eb49 100644
--- a/scripts/http-mobileversion-checker.nse
+++ b/scripts/http-mobileversion-checker.nse
@@ -29,7 +29,6 @@ local target = require "target"
 local shortport = require "shortport"
 local httpspider = require "httpspider"
 local stdnse = require "stdnse"
-local table = require "table"
 
 getLastLoc = function(host, port, useragent)
 
diff --git a/scripts/http-ntlm-info.nse b/scripts/http-ntlm-info.nse
index 81c532e64..76fcf0084 100644
--- a/scripts/http-ntlm-info.nse
+++ b/scripts/http-ntlm-info.nse
@@ -5,7 +5,6 @@ local stdnse = require "stdnse"
 local base64 = require "base64"
 local smbauth = require "smbauth"
 local string = require "string"
-local table = require "table"
 
 
 description = [[
diff --git a/scripts/http-open-redirect.nse b/scripts/http-open-redirect.nse
index 4acbb73b7..9846b535c 100644
--- a/scripts/http-open-redirect.nse
+++ b/scripts/http-open-redirect.nse
@@ -2,7 +2,6 @@ local http = require "http"
 local httpspider = require "httpspider"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local string = require "string"
 local table = require "table"
 local url = require "url"
 
diff --git a/scripts/http-referer-checker.nse b/scripts/http-referer-checker.nse
index 7d8835e4b..b6828388f 100644
--- a/scripts/http-referer-checker.nse
+++ b/scripts/http-referer-checker.nse
@@ -27,7 +27,6 @@ license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
 local table = require "table"
-local string = require "string"
 local httpspider = require "httpspider"
 
 portrule = shortport.port_or_service( {80, 443}, {"http", "https"}, "tcp", "open")
diff --git a/scripts/http-robtex-reverse-ip.nse b/scripts/http-robtex-reverse-ip.nse
index acfc19a79..481471d79 100644
--- a/scripts/http-robtex-reverse-ip.nse
+++ b/scripts/http-robtex-reverse-ip.nse
@@ -1,7 +1,6 @@
 local http = require "http"
 local ipOps = require "ipOps"
 local stdnse = require "stdnse"
-local string = require "string"
 local table = require "table"
 
 description = [[
diff --git a/scripts/http-userdir-enum.nse b/scripts/http-userdir-enum.nse
index 6748d9f91..579723165 100644
--- a/scripts/http-userdir-enum.nse
+++ b/scripts/http-userdir-enum.nse
@@ -1,9 +1,6 @@
-local base64 = require "base64"
-local bin = require "bin"
 local datafiles = require "datafiles"
 local http = require "http"
 local nmap = require "nmap"
-local os = require "os"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
 local string = require "string"
diff --git a/scripts/http-vuln-cve2006-3392.nse b/scripts/http-vuln-cve2006-3392.nse
index f87c820f7..470f09953 100644
--- a/scripts/http-vuln-cve2006-3392.nse
+++ b/scripts/http-vuln-cve2006-3392.nse
@@ -1,7 +1,6 @@
 local http = require "http"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local string = require "string"
 local vulns = require "vulns"
 
 description = [[
@@ -77,4 +76,4 @@ to bypass the removal of "../" directory traversal sequences.
     stdnse.debug1(detection_session.body)
     return vuln_report:make_output(detection_session.body)
   end
-end
\ No newline at end of file
+end
diff --git a/scripts/http-vuln-cve2013-0156.nse b/scripts/http-vuln-cve2013-0156.nse
index c90bed5da..e8a81222a 100644
--- a/scripts/http-vuln-cve2013-0156.nse
+++ b/scripts/http-vuln-cve2013-0156.nse
@@ -46,7 +46,6 @@ categories = {"exploit","vuln"}
 local http = require "http"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local string = require "string"
 local vulns = require "vulns"
 
 portrule = shortport.http
diff --git a/scripts/http-vuln-cve2014-2126.nse b/scripts/http-vuln-cve2014-2126.nse
index 32f5a5449..b47c28cf5 100644
--- a/scripts/http-vuln-cve2014-2126.nse
+++ b/scripts/http-vuln-cve2014-2126.nse
@@ -1,5 +1,4 @@
 local anyconnect = require('anyconnect')
-local stdnse = require('stdnse')
 local shortport = require('shortport')
 local vulns = require('vulns')
 local sslcert = require('sslcert')
@@ -80,4 +79,4 @@ Cisco Adaptive Security Appliance (ASA) Software 8.2 before 8.2(5.47), 8.4 befor
 		end
   end
   return report:make_output(vuln_table)
-end
\ No newline at end of file
+end
diff --git a/scripts/http-vuln-cve2014-2127.nse b/scripts/http-vuln-cve2014-2127.nse
index 612223661..2b16d6941 100644
--- a/scripts/http-vuln-cve2014-2127.nse
+++ b/scripts/http-vuln-cve2014-2127.nse
@@ -1,5 +1,4 @@
 local anyconnect = require('anyconnect')
-local stdnse = require('stdnse')
 local shortport = require('shortport')
 local vulns = require('vulns')
 local sslcert = require('sslcert')
@@ -80,4 +79,4 @@ Cisco Adaptive Security Appliance (ASA) Software 8.x before 8.2(5.48), 8.3 befor
 		end
   end
   return report:make_output(vuln_table)
-end
\ No newline at end of file
+end
diff --git a/scripts/http-vuln-cve2014-2128.nse b/scripts/http-vuln-cve2014-2128.nse
index 6d7df3048..266bd2824 100644
--- a/scripts/http-vuln-cve2014-2128.nse
+++ b/scripts/http-vuln-cve2014-2128.nse
@@ -1,5 +1,4 @@
 local anyconnect = require('anyconnect')
-local stdnse = require('stdnse')
 local shortport = require('shortport')
 local vulns = require('vulns')
 local sslcert = require('sslcert')
@@ -81,4 +80,4 @@ The SSL VPN implementation in Cisco Adaptive Security Appliance (ASA) Software 8
 		end
   end
   return report:make_output(vuln_table)
-end
\ No newline at end of file
+end
diff --git a/scripts/http-vuln-cve2014-2129.nse b/scripts/http-vuln-cve2014-2129.nse
index e4d9fecc0..e6e83b6ec 100644
--- a/scripts/http-vuln-cve2014-2129.nse
+++ b/scripts/http-vuln-cve2014-2129.nse
@@ -1,5 +1,4 @@
 local anyconnect = require('anyconnect')
-local stdnse = require('stdnse')
 local shortport = require('shortport')
 local vulns = require('vulns')
 local sslcert = require('sslcert')
@@ -78,4 +77,4 @@ The SIP inspection engine in Cisco Adaptive Security Appliance (ASA) Software 8.
 		end
   end
   return report:make_output(vuln_table)
-end
\ No newline at end of file
+end
diff --git a/scripts/ip-geolocation-geobytes.nse b/scripts/ip-geolocation-geobytes.nse
index fbf6628dd..788c6a59f 100644
--- a/scripts/ip-geolocation-geobytes.nse
+++ b/scripts/ip-geolocation-geobytes.nse
@@ -3,7 +3,6 @@ local ipOps = require "ipOps"
 local json = require "json"
 local nmap = require "nmap"
 local stdnse = require "stdnse"
-local table = require "table"
 
 description = [[
 Tries to identify the physical location of an IP address using the
diff --git a/scripts/irc-botnet-channels.nse b/scripts/irc-botnet-channels.nse
index 71717f80a..0fcb09603 100644
--- a/scripts/irc-botnet-channels.nse
+++ b/scripts/irc-botnet-channels.nse
@@ -1,5 +1,4 @@
 local comm = require "comm"
-local math = require "math"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
 local string = require "string"
diff --git a/scripts/irc-brute.nse b/scripts/irc-brute.nse
index 436be1459..86c7600f8 100644
--- a/scripts/irc-brute.nse
+++ b/scripts/irc-brute.nse
@@ -1,10 +1,8 @@
 local brute = require "brute"
 local comm = require "comm"
 local creds = require "creds"
-local math = require "math"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local string = require "string"
 
 description=[[
 Performs brute force password auditing against IRC (Internet Relay Chat) servers.
diff --git a/scripts/irc-info.nse b/scripts/irc-info.nse
index a239e3382..fedb917f3 100644
--- a/scripts/irc-info.nse
+++ b/scripts/irc-info.nse
@@ -1,10 +1,7 @@
 local comm = require "comm"
-local math = require "math"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local string = require "string"
-local table = require "table"
 
 description = [[
 Gathers information from an IRC server.
diff --git a/scripts/iscsi-info.nse b/scripts/iscsi-info.nse
index 4fb92038e..2da6ad150 100644
--- a/scripts/iscsi-info.nse
+++ b/scripts/iscsi-info.nse
@@ -1,7 +1,6 @@
 local iscsi = require "iscsi"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local table = require "table"
 
 description = [[
 Collects and displays information from remote iSCSI targets.
diff --git a/scripts/jdwp-exec.nse b/scripts/jdwp-exec.nse
index dec208bfe..dde093a3a 100644
--- a/scripts/jdwp-exec.nse
+++ b/scripts/jdwp-exec.nse
@@ -4,7 +4,6 @@ local jdwp = require "jdwp"
 local stdnse = require "stdnse"
 local nmap = require "nmap"
 local shortport = require "shortport"
-local string = require "string"
 
 description = [[
 Attempts to exploit java's remote debugging port. When remote debugging
diff --git a/scripts/jdwp-info.nse b/scripts/jdwp-info.nse
index fd509cd9e..b8e46730a 100644
--- a/scripts/jdwp-info.nse
+++ b/scripts/jdwp-info.nse
@@ -4,7 +4,6 @@ local jdwp = require "jdwp"
 local stdnse = require "stdnse"
 local nmap = require "nmap"
 local shortport = require "shortport"
-local string = require "string"
 
 description = [[
 Attempts to exploit java's remote debugging port.  When remote
diff --git a/scripts/ldap-rootdse.nse b/scripts/ldap-rootdse.nse
index c469dcbaa..73508298b 100644
--- a/scripts/ldap-rootdse.nse
+++ b/scripts/ldap-rootdse.nse
@@ -3,7 +3,6 @@ local ldap = require "ldap"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local string = require "string"
 
 description = [[
 Retrieves the LDAP root DSA-specific Entry (DSE)
diff --git a/scripts/ms-sql-info.nse b/scripts/ms-sql-info.nse
index 74b3d15ab..d679d90de 100644
--- a/scripts/ms-sql-info.nse
+++ b/scripts/ms-sql-info.nse
@@ -2,8 +2,6 @@ local mssql = require "mssql"
 local nmap = require "nmap"
 local smb = require "smb"
 local stdnse = require "stdnse"
-local string = require "string"
-local table = require "table"
 
 -- -*- mode: lua -*-
 -- vim: set filetype=lua :
diff --git a/scripts/mysql-vuln-cve2012-2122.nse b/scripts/mysql-vuln-cve2012-2122.nse
index f2853864e..ae941cdea 100644
--- a/scripts/mysql-vuln-cve2012-2122.nse
+++ b/scripts/mysql-vuln-cve2012-2122.nse
@@ -3,7 +3,6 @@ local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
 local string = require "string"
-local table = require "table"
 local vulns = require "vulns"
 local openssl = stdnse.silent_require "openssl"
 
diff --git a/scripts/nat-pmp-info.nse b/scripts/nat-pmp-info.nse
index 8c2192c90..9608d56c9 100644
--- a/scripts/nat-pmp-info.nse
+++ b/scripts/nat-pmp-info.nse
@@ -1,7 +1,6 @@
 local natpmp = require "natpmp"
 local nmap = require "nmap"
 local shortport = require "shortport"
-local stdnse = require "stdnse"
 
 description = [[
 Gets the routers WAN IP using the NAT Port Mapping Protocol (NAT-PMP).
diff --git a/scripts/nping-brute.nse b/scripts/nping-brute.nse
index 5e3056d93..84d86141f 100644
--- a/scripts/nping-brute.nse
+++ b/scripts/nping-brute.nse
@@ -1,7 +1,6 @@
 local bin = require "bin"
 local brute = require "brute"
 local creds = require "creds"
-local math = require "math"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
diff --git a/scripts/oracle-enum-users.nse b/scripts/oracle-enum-users.nse
index 8226ec003..0870c3fd4 100644
--- a/scripts/oracle-enum-users.nse
+++ b/scripts/oracle-enum-users.nse
@@ -1,8 +1,6 @@
-local math = require "math"
 local nmap = require "nmap"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local string = require "string"
 local table = require "table"
 local tns = require "tns"
 local unpwdb = require "unpwdb"
diff --git a/scripts/pop3-capabilities.nse b/scripts/pop3-capabilities.nse
index fa50f8b45..7d89e8e60 100644
--- a/scripts/pop3-capabilities.nse
+++ b/scripts/pop3-capabilities.nse
@@ -1,7 +1,6 @@
 local pop3 = require "pop3"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local string = require "string"
 local table = require "table"
 
 description = [[
diff --git a/scripts/sip-call-spoof.nse b/scripts/sip-call-spoof.nse
index f9a644134..4448166c7 100644
--- a/scripts/sip-call-spoof.nse
+++ b/scripts/sip-call-spoof.nse
@@ -2,7 +2,6 @@ local nmap = require "nmap"
 local shortport = require "shortport"
 local sip = require "sip"
 local stdnse = require "stdnse"
-local table = require "table"
 
 description = [[
 Spoofs a call to a SIP phone and detects the action taken by the target (busy, declined, hung up, etc.)
diff --git a/scripts/sip-methods.nse b/scripts/sip-methods.nse
index 23325ae3c..88ad5c4c8 100644
--- a/scripts/sip-methods.nse
+++ b/scripts/sip-methods.nse
@@ -2,7 +2,6 @@ local nmap = require "nmap"
 local shortport = require "shortport"
 local sip = require "sip"
 local stdnse = require "stdnse"
-local table = require "table"
 
 description = [[
 Enumerates a SIP Server's allowed methods (INVITE, OPTIONS, SUBSCRIBE, etc.)
diff --git a/scripts/smb-enum-shares.nse b/scripts/smb-enum-shares.nse
index 1ea84c0cc..8e43f284f 100644
--- a/scripts/smb-enum-shares.nse
+++ b/scripts/smb-enum-shares.nse
@@ -1,7 +1,6 @@
 local smb = require "smb"
 local stdnse = require "stdnse"
 local string = require "string"
-local table = require "table"
 
 description = [[
 Attempts to list shares using the <code>srvsvc.NetShareEnumAll</code> MSRPC function and
diff --git a/scripts/smb-os-discovery.nse b/scripts/smb-os-discovery.nse
index db7054c2d..35af1fcc1 100644
--- a/scripts/smb-os-discovery.nse
+++ b/scripts/smb-os-discovery.nse
@@ -2,8 +2,6 @@ local smb = require "smb"
 local stdnse = require "stdnse"
 local string = require "string"
 local table = require "table"
-local math = require "math"
-local os = require "os"
 
 description = [[
 Attempts to determine the operating system, computer name, domain, workgroup, and current
diff --git a/scripts/snmp-processes.nse b/scripts/snmp-processes.nse
index c708a6630..35d898d1e 100644
--- a/scripts/snmp-processes.nse
+++ b/scripts/snmp-processes.nse
@@ -2,7 +2,6 @@ local nmap = require "nmap"
 local shortport = require "shortport"
 local snmp = require "snmp"
 local stdnse = require "stdnse"
-local table = require "table"
 
 description = [[
 Attempts to enumerate running processes through SNMP.
diff --git a/scripts/snmp-win32-services.nse b/scripts/snmp-win32-services.nse
index 92ed9cf92..baf6ab44f 100644
--- a/scripts/snmp-win32-services.nse
+++ b/scripts/snmp-win32-services.nse
@@ -1,7 +1,6 @@
 local nmap = require "nmap"
 local shortport = require "shortport"
 local snmp = require "snmp"
-local stdnse = require "stdnse"
 local table = require "table"
 
 description = [[
diff --git a/scripts/snmp-win32-shares.nse b/scripts/snmp-win32-shares.nse
index c3a26a5de..b6592d2bf 100644
--- a/scripts/snmp-win32-shares.nse
+++ b/scripts/snmp-win32-shares.nse
@@ -2,7 +2,6 @@ local nmap = require "nmap"
 local shortport = require "shortport"
 local snmp = require "snmp"
 local stdnse = require "stdnse"
-local table = require "table"
 
 description = [[
 Attempts to enumerate Windows Shares through SNMP.
diff --git a/scripts/snmp-win32-users.nse b/scripts/snmp-win32-users.nse
index 2aac2bc0a..8ee2dde80 100644
--- a/scripts/snmp-win32-users.nse
+++ b/scripts/snmp-win32-users.nse
@@ -1,7 +1,6 @@
 local nmap = require "nmap"
 local shortport = require "shortport"
 local snmp = require "snmp"
-local stdnse = require "stdnse"
 local table = require "table"
 
 description = [[
diff --git a/scripts/ssl-ccs-injection.nse b/scripts/ssl-ccs-injection.nse
index 597ec289e..f8eec3d66 100644
--- a/scripts/ssl-ccs-injection.nse
+++ b/scripts/ssl-ccs-injection.nse
@@ -1,4 +1,3 @@
-local match = require('match')
 local nmap = require('nmap')
 local shortport = require('shortport')
 local sslcert = require('sslcert')
diff --git a/scripts/ssl-cert.nse b/scripts/ssl-cert.nse
index b7a3b9c70..b878a80ce 100644
--- a/scripts/ssl-cert.nse
+++ b/scripts/ssl-cert.nse
@@ -1,5 +1,4 @@
 local nmap = require "nmap"
-local os = require "os"
 local shortport = require "shortport"
 local sslcert = require "sslcert"
 local stdnse = require "stdnse"
diff --git a/scripts/ssl-enum-ciphers.nse b/scripts/ssl-enum-ciphers.nse
index c8b0f8606..9b1488962 100644
--- a/scripts/ssl-enum-ciphers.nse
+++ b/scripts/ssl-enum-ciphers.nse
@@ -1,5 +1,4 @@
 local coroutine = require "coroutine"
-local io = require "io"
 local math = require "math"
 local nmap = require "nmap"
 local shortport = require "shortport"
diff --git a/scripts/ssl-heartbleed.nse b/scripts/ssl-heartbleed.nse
index 7da2bd720..0cfddc0f1 100644
--- a/scripts/ssl-heartbleed.nse
+++ b/scripts/ssl-heartbleed.nse
@@ -4,7 +4,6 @@ local nmap = require('nmap')
 local shortport = require('shortport')
 local sslcert = require('sslcert')
 local stdnse = require('stdnse')
-local string = require('string')
 local table = require('table')
 local vulns = require('vulns')
 local have_tls, tls = pcall(require,'tls')
diff --git a/scripts/stuxnet-detect.nse b/scripts/stuxnet-detect.nse
index 64a810191..7e7aa4feb 100644
--- a/scripts/stuxnet-detect.nse
+++ b/scripts/stuxnet-detect.nse
@@ -2,7 +2,6 @@ local io = require "io"
 local msrpc = require "msrpc"
 local smb = require "smb"
 local stdnse = require "stdnse"
-local string = require "string"
 
 -- -*- mode: lua -*-
 -- vim: set filetype=lua :
diff --git a/scripts/targets-ipv6-wordlist.nse b/scripts/targets-ipv6-wordlist.nse
index 3901aea39..d2ce3a0e1 100644
--- a/scripts/targets-ipv6-wordlist.nse
+++ b/scripts/targets-ipv6-wordlist.nse
@@ -4,7 +4,6 @@ local stdnse = require "stdnse"
 local string = require "string"
 local target = require "target"
 local datafiles = require "datafiles"
-local bin = require "bin"
 local table = require "table"
 local math = require "math"
 
diff --git a/scripts/tftp-enum.nse b/scripts/tftp-enum.nse
index 819c1c023..ccbcaed25 100644
--- a/scripts/tftp-enum.nse
+++ b/scripts/tftp-enum.nse
@@ -1,7 +1,5 @@
 local datafiles = require "datafiles"
-local math = require "math"
 local nmap = require "nmap"
-local os = require "os"
 local shortport = require "shortport"
 local stdnse = require "stdnse"
 local string = require "string"
diff --git a/scripts/tls-nextprotoneg.nse b/scripts/tls-nextprotoneg.nse
index bb6a28e98..edb5ea891 100644
--- a/scripts/tls-nextprotoneg.nse
+++ b/scripts/tls-nextprotoneg.nse
@@ -3,7 +3,6 @@ local shortport = require "shortport"
 local stdnse = require "stdnse"
 local table = require "table"
 local bin = require "bin"
-local os = require "os"
 local tls = require "tls"
 
 description = [[
diff --git a/scripts/vnc-info.nse b/scripts/vnc-info.nse
index b273cf0a1..36c15f7da 100644
--- a/scripts/vnc-info.nse
+++ b/scripts/vnc-info.nse
@@ -1,6 +1,5 @@
 local shortport = require "shortport"
 local stdnse = require "stdnse"
-local table = require "table"
 local vnc = require "vnc"
 
 description = [[
diff --git a/scripts/whois-domain.nse b/scripts/whois-domain.nse
index bf884bdbd..9bf6ae749 100644
--- a/scripts/whois-domain.nse
+++ b/scripts/whois-domain.nse
@@ -79,11 +79,8 @@ author = "George Chatzisofroniou"
 license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
 categories = {"discovery", "external", "safe"}
 
-local io = require "io"
 local ipOps = require "ipOps"
-local math = require "math"
 local nmap = require "nmap"
-local os = require "os"
 local stdnse = require "stdnse"
 local string = require "string"
 local table = require "table"