How to simulate CPU activity on a Linux system? [New Question]

A quick question, answered on Heelpbook, about “How to simulate CPU activity on a Linux system?”, something that could be useful in some scenarios like testing or development, or just benchmarking with additional tools. Read More …

Find Apache httpd.conf/apache2.conf Configuration File [New Question]

A quick question, answered on Heelpbook, about how to “Find Apache httpd.conf/apache2.conf Configuration File”. This can save time when there’s need to configure an existing httpd/Apache web server already installed on a Linux system. Read More …

CentOS / RHEL 7 / Debian – Disable IPv6

If network troubleshooting leads you to believe there’s an issue with IPv6, you may need to shut down that protocol on your Linux machines. Since some hardware doesn’t take advantage of IPv6 (and most admins are still working with IPv4), a temporary and easy solution is to disable IPv6. Read More …

CentOS / RHEL 7 – Regenerate UUID for Network Cards (Physical and Virtualized Environments)

Usually, when cloning VMs on virtualized systems (Hyper-V or VMware, for example) an issue could occur related to vNICs: a vNIC could be renamed and so no more the same of the old VMs (obviously). Read More …

CentOS / RHEL – Managing Networking Service

One of the most common activities on a Linux system is, usually, modify some networking parameters to adapt the system to the actual network; so how can we restart networking service using command line options without restarting the whole system? How can I start / stop and restart networking service on a CentOS/RHEL 7 based system? Read More …