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Developer tools · #centos
CentOS Stream’s rolling‑release model changes the way you manage OS updates. Learn how to handle package drift, testing, and CI integration for production workloads.
Learn how to manage network traffic in CentOS using Firewalld zones, including the critical difference between runtime and permanent rules to prevent configuration loss.
A diagnostic guide for CentOS administrators to resolve 'Disk Full' errors, distinguishing between byte capacity and inode exhaustion in /var/log.
Goal Determine whether enabling CONFIG_DEBUG_KMEMLEAK by default in the CentOS 7 kernel would provide automated detection of similar leaks without imposing an unacceptable performance penalty. Constraints and uncertainty The journald file‑descriptor leak was fixed in systemd-219-62.el7_8.2 , yet the kernel still ships with CONFIG_DEBUG_KMEMLEAK disabled. Ena
Cache Expiration Behavior DNF caches repository metadata under /var/cache/dnf with a configurable metadata_expire value that defaults to six hours for new metadata and thirty days for previously successful metadata. The setting controls when an automatic refresh is triggered, yet the exact interaction between the expire window, explicit dnf makecache calls,
Goal Determine how to reliably toggle an SELinux boolean on CentOS and ensure the change survives a reboot, while also understanding the impact on already-running containers. Current behavior The semanage boolean tool updates the active boolean file, but the kernel does not reload the value until a reboot or a setsebool -P command is issued. On CentOS 8 and
CentOS Stream functions as the upstream development platform for Red Hat Enterprise Linux (RHEL), utilizing a continuous delivery model. Unlike the legacy downstream rebuild approach, changes flow from Stream into RHEL to reduce the gap between feature introduction and enterprise stabilization. While binary compatibility with corresponding RHEL minor release
Goal Restart a CentOS systemd service after failure using Restart=on-failure while ensuring writes completed before the crash are not repeated on restart. Constraints systemd restarts the process but does not record whether a write finished before termination. No standard unit hook tells a restarted process whether it is starting for the first time or resumi
CentOS 8 delivers multiple application versions through dnf module streams provided by AppStream repositories. The dnf module command relies on module stream metadata to enable, disable, or install streams. When the resolver cannot locate requested metadata, dnf emits 'Failed to resolve module stream'. The current message offers limited feedback about whethe