‘Linux’ Performance Monitoring (& Tuning) Tools Maps – Because a picture is Worth a Thousand Words

As GNU/Linux system engineers or administrators, knowing the type utilities that can be used to monitor, troubleshoot and fine-tune a system is a vital part of the skill one should posses. However, unless one will be using many of these tools each and everyday, it’s difficult to memorize all of them. That’s why Brendan Gregg, who’s a senior … Read more

I Forgot My Administrator Password [Fix]

Yesterday after setting up my CentOS 7 (minimal install) virtual machine, I forgot my administrator password. To make things worse, I didn’t give administrative privileges to the default user (one that you get to create while installing) either. So at the end, I basically ended up with a useless user account (ai yai yai!). Luckily, as a fix, without reinstalling … Read more

Install Glances (system monitor, CLI) on Ubuntu 15.10

‘Glances’ is an extremely powerful command-line based system monitor that I came across a couple of years ago. It’s capable of monitoring various hardware devices (CPU, Memory, Swap-disks, Hard disk drives, Network connections, Processes, System load, Sensors etc) and provide alerts based upon their load. Due to its simplicity & the clever UI design, it makes the life … Read more