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Developer tools · #centos
Install Cockpit on CentOS Stream 9, restrict port 9090 to trusted sources, and verify the socket before opening the console.
Learn how to identify and resolve CentOS 8 repository 404 errors by redirecting dnf to the CentOS Vault archive after the distribution reached end-of-life.
Name resolution fails while IP connectivity works on CentOS Stream 9. This diagnostic guide maps systemd-resolved symptoms to causes and provides ordered checks and safe fixes.
A diagnostic guide for CentOS administrators to resolve /var/log disk exhaustion, focusing on systemd-journald vacuuming and permanent storage capping.
A practical decision guide for selecting Docker or Podman on CentOS Stream 9, covering architecture differences, security defaults, systemd integration, ecosystem compatibility, and a hands-on validation procedure.
After a dnf update on CentOS, old processes can keep using deleted libraries. needs-restarting from dnf-utils finds which processes and systemd units need a restart, and flags when a reboot is warranted, helping avoid unnecessary full reboots.
Learn how to diagnose and fix 'Permission Denied' errors in CentOS caused by SELinux. This guide covers AVC log analysis, boolean configuration, and custom policy creation.
Grow an XFS logical volume on CentOS using LVM’s lvextend and xfs_growfs. Verify layout with pvs/vgs/lvs, keep free space, and use snapshots for recoverability.
Learn how to use firewalld zones and rich rules on CentOS 7 to allow HTTP only from a trusted subnet, test with time‑out rules, and make the changes permanent.
vault
docker
podman