Permalinks are the permanent URLs to your individual weblog posts, as well as categories and other lists of weblog postings. A permalink is what another weblogger will use to link to your article (or section), or how you might send a link to your story in an e-mail message. The URL to each post should […]

Create ramdisk in Linux lets you directly store files in physical memory as if it was on your hard drive. RAM disks use the normal RAM in main memory as if it were a partition on a hard drive rather than actually accessing the data bus normally used for secondary storage such as hard disk […]

VMSTAT vmstat command reports information about processes, memory, paging, block IO, traps, and cpu activity. However, a real advantage of vmstat command output – is to the point and (concise) easy to read/understand. The output of vmstat command use to help identify system bottlenecks. The details related with each field in the output is given in […]

Suppose some program on your system refuses to work or it works, but much slower than you’ve expected. How can you investigate the reason of such undesirable behavior? This technique will often be helpful in troubleshooting, PHP issues as well. Let us see how to use the strace command. First of all, you can read and […]

Apache Semaphore issues This is one of the rarest conditions which I came across. The webserver failed to load with following error messages in the server log file. The server had fairly good uptime and was a busy server. The error message No space left on device: Couldn’t create accept lock made me confused as […]