How do I Boot into Rescue Mode?
Introduction There comes a point in every system administrator’s life when a server becomes completely unresponsive. Whether a broken firewall configuration has locked you out …
Latest articles for category: System
How do I use the vmstat command?
For a more concise understanding of system performance, try vmstat. With vmstat, it is possible to get an overview of process, memory, swap, I/O, system, …
Is Your System Displaying Signal 11 Errors?
A signal 11 error, commonly know as a segmentation fault, means that the program accessed a memory location that was not assigned. If you receive …
What is the recommended partitioning scheme?
A swap partition (at least 256 MB) — swap partitions are used to support virtual memory. In other words, data is written to a swap …
Redhat / CentOS / Fedora Linux Open Port
Red Hat Enterprise Linux 3 / 4 / 5 and above => Old Red hat Linux version => CentOS 4 and above => Fedora Linux …
Changing the Default Boot Kernel in Linux
Introduction If you have multiple Linux kernels installed, whether you’re testing a custom build, running a real-time kernel, or keeping a stable fallback after a …
Use Windows Firewall to Block IPs and IP Ranges
Overview Securing a modern system requires tight control over network traffic. Workstations and servers face constant background threats, from automated bot scans to relentless brute-force …
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