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October 10, 2025
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April 27, 2012

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How to Make Image which Can’t Be Cached by Browser

kumkum13 years ago3 years ago01 mins mins

Images as static content on website are usually be cached by browser. Using PHP we can make the image can’t be cached and always loaded from server by putting random number behind the image file. The HTML output will be: The number 1331835943 is generated dynamically by PHP that forces the browser to always load…

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How to Disable Firewall on Centos

kumkum13 years ago13 years ago01 mins mins

We can use iptables, service, and chkconfig commands to enable and disable firewall in Centos. iptables is an administration tool for IPv4 packet filtering and NAT. service is a command to run a System V init script. It is used to save, stop, and start services. chkconfig command is used to update and query runlevel…

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