How to Rescue, Repair and Reinstall GRUB Boot Loader in Ubuntu
This tutorial will guide you on how to rescue, repair or reinstall a damaged Ubuntu machine which cannot be booted
Impress Your Friends with This Fake Hollywood Hacker Terminal
In Hollywood movies, hacking always seems interesting, especially because the whole action is spiced up with fancy desktop environments/backgrounds, rapidly
Rename All Files and Directory Names to Lowercase in Linux
In our previous article, we have described how to count the number of files and subdirectories inside a given directory.
How to Secure Nginx with SSL and Let’s Encrypt in FreeBSD
In this guide we’ll discuss how to secure Nginx web server in FreeBSD with TLS/SSL certificates offered for by Let’s
How to Setup Rsyslog Client to Send Logs to Rsyslog Server in CentOS 7
Log management is one of the most critical component in a network infrastructure. Logs messages are constantly generated by numerous
30 Useful ‘ps Command’ Examples for Linux Process Monitoring
ps (processes status) is a native Unix/Linux utility for viewing information concerning a selection of running processes on a system:
How to Block or Disable Normal User Logins in Linux
As a system administrator, you will inevitably perform scheduled system maintenances at some point or another. A few times, your
23 Useful PKG Command Examples to Manage Packages in FreeBSD
In this tutorial we’ll explain how to manage pre-compiled binary package applications in FreeBSD with the help of the package
How to Delete Old Unused Kernels in Debian and Ubuntu
In our last article, we’ve explained how to delete old unused kernels in CentOS/RHEL/Fedora. In this article, we will explain
How to Delete Old Unused Kernels in CentOS, RHEL and Fedora
In this article, we will show how to remove old/unused kernel images on RHEL/CentOS/Fedora systems. However, before you remove an
Sysdig – A Powerful System Monitoring and Troubleshooting Tool for Linux
Sysdig is an open-source, cross-platform, powerful and flexible system monitoring and troubleshooting tool for Linux; it also works on Windows
How to Create a Centralized Log Server with Rsyslog in CentOS/RHEL 7
In order for system administrator to identify or troubleshoot a problem on a CentOS 7 or RHEL 7 server system,