Server Managment

Swap is beneficial, because it allows inactive memory blocks to be written to disk, freeing up real memory for stuff like file system caching. Swap also (to some extent) protects you against short bursts of memory demand. Linux (by default) over commits real memory, relying on the fact that most applications ask for more than they need, but if they …

How do I list all hard disk partitions under Linux operating systems? Usually, your hard disk drive divided into one or more logical disks called partitions. This division is described in the partition table found in sector 0 of the hard disk. The device is usually /dev/sda, /dev/sdb or so. A device name refers to the entire disk and the …

Q. How do I list or display the permission of a file using ssh? I don’t have GUI installed on a remote Linux computer. A.You need to use ls command with -l option. File access permissions are displayed in the first column of the output, after the character for file type. ls command List information about the FILEs. If no argument …

The Exim mail server has a lot of options/commands to find out the details of spammers easily from the command line. Click this link “Spam Check” to get more ideas. We can find out the mail queue details, spam mail sender details, spam mail counts etc from the link I mentioned above. Here is a script/piped-command to find out the …

mysqldump is an effective tool to backup MySQL database. It creates a *.sql file withDROP table, CREATE table and INSERT intosql-statements of the source database. To restore the database,  execute the *.sql file on destination database. Using mysqldump, you can backup a local database and restore it on a remote database at the same time, using a single command. In …

PHPMyAdmin error Have you ever come across the following error when you access PHPMyAdmin from cPanel. Access Denied Unable to establish a PHP session. If you believe that this is in error or inadvertent, contact your system administrator and ask them to review your server settings. Normally, you will get this error when the permission or ownership of the tmp folder …

I’ve installed memcached server under Linux but it is still showing old data. How do I flush the contents of a Memcached instance / server? You can invalidate all existing cache items using the flush_all command. This command does not pause the server, as it returns immediately. It does not free up or flush memory at all, it just causes …