What is Varnish Varnish is a caching HTTP reverse proxy / web application accelerator. It is installed infront of Apache or Nginx on a server and it can increase the speeds by upto 300-1000 times, depending on the server architecture and configuration. Prerequisites You need have a user with root / sudo privileges for a …
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Sometimes while installing WordPress plugins, you might come across a message to install / enable Mcrypt extension for PHP. Mcrypt is an interface which supports a wide range of block algorithims. It support Algorithims like DES, TripleDES, GOST, OFB etc. Note : The Mcrypt extension relies on the ‘libmcrypt’ extension, which is not maintained since …
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If you require to save the results of your MYSQL query to a CSV or Excel sheet, you can do so with the help of ‘INTO OUTFILE‘. This saves the query result as a ‘CSV’. You can open this CSV file in Excel and save it as a .XLS file as well. The syntax of …
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To locate files or folders on your Linux server through command line or bash, you can use the ‘find‘ command. The syntax for the find command is as follows : find {dirctory_to_search} {search_by} {pattern_to_search} [action] For Example, if you wish to search a file called ‘filename.php’ by name on the entire server. fine / -name …
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Before upgrading it is always recommended that you create a backup first. Step 1 : Check the current version of Ubuntu uname -mrs lsb_release -a This should return an output in the following format : Linux 3.2.0-51-generic x86_64 No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 12.04.4 LTS Release: 12.04 Codename: precise Step …
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GeoIP is a PHP extension, which is used to get all the information like, city, state, country, longitude / latitude etc for any IP address. You can use this extension to track the visitors to your site. It can help you prepare better analytic for your user-base with the information collected. To install GeoIP, we …
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If you have a custom WordPress login form or you do not want anyone to access the default login form, due to security reasons or any other reason, you can set a redirect for the wp-login.php page. You could set a redirect simply in the .htaccess or the site’s Nginx config file, but this will …
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If you have a domain, ‘example.com’ and you want it to be available both when a user enters, ‘http://example.com’ and ‘http://www.example.com’, and you are running Nginx on your server, you can do so by updating the Nginx conf file for that Site. This file can usually be found in /etc/nginx/sites-available/ folder. Open the file and …
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To find out the processes running on your server : ps aux This will show you the ‘PID’ of the process along with it’s other information. You can delete a process by using the ‘kill’ command with the process PID kill 16516 Sometimes you run into errors that require emergent steps like killing of certain …
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If you wish to pass PHP POST array variables without submitting a form, using the PHP Curl library to another URL, you first need to have a an Array which holds all the values for the POST array $post[‘lname’] = ‘Last name’; $post[‘fname’] = ‘First Name’ $post[‘mail’] = ‘example@mail.com’; Once we have the array set, …
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