Monthly Archives: September 2015

Command Line Tools to Monitor and Debug Linux Performance

1. Top – Linux Process Monitoring Linux Top command is a performance monitoring program which is used frequently by many system administrators to monitor Linux performance and it is available under many Linux/Unix like operating systems. The top command used to dipslay all the running and active real-time processes in ordered list and updates it… Read More »

MegaCLI, Raid Levels

Common invocations of MegaCLI Get an Overview of controllers and attached disk arrays ./MegaCli64 -AdpAllInfo -aALL (extracted info below) ./MegaCli64 -CFGDsply -aALL  shows same info, with same verbosity Adapter #0 ======================================== Product Name    : PERC H800 Adapter Serial No       : 25B0088 Link Speed           : 0 Number of Frontend Port: 0 Device Interface  : PCIE Number… Read More »

How To Add Swap on Ubuntu 14.04

Check the System for Swap Information Before we begin, we will take a look at our operating system to see if we already have some swap space available. We can have multiple swap files or swap partitions, but generally one should be enough. We can see if the system has any configured swap by typing:… Read More »