To stop service use the following command: # service iptables stop To prevent service from further loading every boot: # chkconfig iptables off Check runlevels where service exists: # chkconfig –list iptables

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To resolve the MySQL error: Mysql Error: Incorrect key file for table ‘/tmp/#sql_181_0.MYI’; try to repair it check the empty space in your /tmp folder – it should be enough to create temp files for large queries.

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Use the following ways to list opened connections and monitor overall network activity on your Linux OS. 1. Using lsof: # lsof -i 2. Using netstat: # netstat -tup 3. Using jnettop: # jnettop -i eth1 PS: eth1 – network interface you want to list connections

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You can list open ports under Linux in following ways. 1. Using netstat: # netstat -tupl or # netstat -anp –udp –tcp | grep LISTEN 2. Using nmap: # nmap -sT -O localhost

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The following example shows how to catch an event Google Maps Api js components loaded: // callback function function loadGoogleMaps() { google.load("maps", "2",{"other_params":"sensor=true"}); window.onunload = GUnload; return; }   function loadGmaps() { var oNewScript = document.createElement("script"); oNewScript.src = ‘http://www.google.com/jsapi?key=google_maps_api_key_here&callback=loadGoogleMaps’; oNewScript.type = ‘text/javascript’; document.getElementsByTagName("head")[0].appendChild(oNewScript);   return; }

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