CentOS

Running ncdu on FreeBSD Unix server
The du (disk usage) command summarizes directory trees’ sizes, including all of their contents and individual files’ sizes on Linux and Unix-like systems such as macOS. It helps track down space hogs. In other words, we can list directories and files that consume large amounts of space on a hard disk drive. Let us see the ncdu command, a curses-based version of the well-known du command.
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Any logged-in unprivileged user can abuse an old bug in sudo to gain root privileges. It was rated as an important security issue for Linux and Unix-like operating systems. The Qualys research team has discovered the heap overflow vulnerability in sudo itself has been hiding in plain sight for nearly 10 years. The bug allows any local users to gain root access without authentication (no user’s password needed). We need to apply patches to our operating systems as soon as possible.
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As you know, Red Hat recently announced that CentOS Linux 8, as a rebuild of RHEL 8, will end in 2021. CentOS Stream continues after that date, serving as the upstream (development) branch of Red Hat Enterprise Linux. The news met with a strong reaction from the open-source community and CentOS users. Today, Red Hat released a new option where RHEL developer subscriptions can now be used in production environments. The developers and team can have up to 16 systems. In other words, it is a no-cost RHEL that small groups and developers can use to build packages and in production environments.
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CentOS is an acronym for Community Enterprise Operating System, and it is a 100% rebuild of RHEL (Red Hat Enterprise Linux). While RHEL costs money, CentOS offered as a free community-supported enterprise Linux distro. Developers and companies who are good at Linux and don’t want to pay RHEL support fees always selected CentOS to save money and get enterprise-class software. However, the free ride is over. Red Hat announced that CentOS Linux 8, as a rebuild of RHEL 8, will end at 2021. CentOS Stream continues after that date, serving as the upstream (development) branch of Red Hat Enterprise Linux.
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There is a new kid in town for resource monitoring on Linux called bashtop. As the name suggests, the entire tool coded in the bash script itself that displays usage and stats for CPU, RAD, HDD/SSD, network, and other resources. Let us see how to install and use bashtop, which is an awesome Linux resource monitor. You don’t need a Linux desktop to install it. You can also install this app on macOS/FreeBSD provided that you meet software requirements.
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CentOS Linux 8.2 (2004) released. It is a Linux distribution derived from RHEL (Red Hat Enterprise Linux) 8.2 source code. CentOS was created when Red Hat stopped providing RHEL free. CentOS 8.2 gives complete control of its open-source software packages and is fully customized for research needs or for running a high-performance website without the need for license fees. Let us see what’s new in CentOS 8.2 (2004) and how to upgrade existing CentOS 8.1.1199 server to 8.2.2004 using the command line or bash prompt.
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CentOS Linux 8.1 (1191) released. It is a Linux distribution derived from RHEL (Red Hat Enterprise Linux) 8.1 source code. CentOS was created when Red Hat stopped providing RHEL free. CentOS 8.1 gives complete control of its open-source software packages and is fully customized for research needs or for running a high-performance website without the need for license fees. Let us see what’s new in CentOS 8.1 (1911) and how to upgrade existing CentOS 8.0.1905 server to 8.1.1911 using the command line.
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