Administration

Using SED in Linux to Edit Large Files

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Recently I encountered a server that had an Apache configuration file that was over 500,000 lines. Changes needed to make were to comment out the CustomLog line for each domain in /etc/httpd/httpd.conf. For this command, I used SED. NAME sed – stream editor for filtering and transforming text SYNOPSIS sed [OPTION]… {script-only-if-no-other-script} [input-file]… DESCRIPTION Sed … Read more

Linux mount CIFS Windows Share

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CIFS stands for Common Internet File System. This is application-level network protocol mainly used to provide shared access to files, printers, serial ports, and miscellaneous communications between nodes. You can access CIFS share from Linux and mount them as a regular filesystem. This is handy if there is a backup service like Infrascale where you … Read more

How do you calculate mysql max_connections variable

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The basic formulas are: Available RAM = Global Buffers + (Thread Buffers x max_connections) max_connections = (Available RAM – Global Buffers) / Thread Buffers To get the list of buffers and their values: Here’s a list of the buffers and whether they’re Global or Thread: Global Buffers: key_buffer_size, innodb_buffer_pool_size, innodb_log_buffer_size, innodb_additional_mem_pool_size, net_buffer_size, query_cache_size Thread Buffers: … Read more

Add second hard drive to linux

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Here is how to add a second disk to linux. In this article, the OS is CentOS 7. Check to see how many drives are installed: You can do this using the df and fdisk command: The above information show the primary disk as sda. Use fdisk to identify the second drive: The sdb drive … Read more

Add Gzip to Plesk Server

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Instructions Login to your Plesk server. Select the domain you wish to enable gzip for from the left hand side. Click in Apache and nginx settings: Down the bottom, add the following to the “Additional nginx directives” field: Click OK to save. Verify with GTMetrix.com Another way is to set up deflate. First you need … Read more