How to Install and Configure MinIO Object Storage on RHEL 7 MinIO is a high-performance, S3-compatible object storage server written in Go. It can run as a single-node server or in distributed mode across multiple nodes, making it suitable for everything from development environments to production-grade data lakes. Because MinIO ships as a single static […]
How to Configure GlusterFS Distributed Storage on RHEL 7 GlusterFS is a scalable, open-source distributed filesystem that aggregates storage from multiple servers into a single, unified namespace. It is commonly used for high-availability shared storage in environments without expensive SAN hardware. RHEL 7 can consume GlusterFS via the CentOS Storage SIG repository or the upstream […]
How to Set Up iSCSI Storage on RHEL 7 iSCSI (Internet Small Computer System Interface) is a block-level network storage protocol that transports SCSI commands over TCP/IP networks. It is widely used in enterprise environments to provide shared block storage without the cost of dedicated Fibre Channel hardware. RHEL 7 ships with full iSCSI support […]
How to Configure DKIM, SPF and DMARC on RHEL 7 Email authentication standards — SPF, DKIM, and DMARC — are essential for any mail server that sends outbound email. Without them, your messages are likely to be rejected or placed in spam folders by major providers such as Gmail, Microsoft 365, and Yahoo. SPF (Sender […]
How to Install and Configure Dovecot IMAP Server on RHEL 7 Dovecot is a secure, high-performance IMAP and POP3 server that integrates seamlessly with Postfix on RHEL 7. While Postfix handles the transport of mail (sending and receiving via SMTP), Dovecot provides the retrieval layer — allowing mail clients such as Thunderbird, Outlook, or Apple […]
How to Install and Configure Postfix Mail Server on RHEL 7 Postfix is a high-performance, security-focused Mail Transfer Agent (MTA) that is installed by default on many RHEL 7 systems. It handles the sending, receiving, and routing of email using the SMTP protocol. Whether you are setting up a server to send application alerts, relay […]
How to Set Up a DNS Server with BIND9 on RHEL 7 The Berkeley Internet Name Domain (BIND) is the most widely deployed DNS server software in the world, and BIND 9 is the version available in the RHEL 7 package repositories. Setting up your own DNS server gives you authoritative control over a domain […]
How to Configure a Static IP Address with NetworkManager on RHEL 7 Configuring a static IP address is one of the most fundamental tasks for any Linux system administrator. On Red Hat Enterprise Linux 7, NetworkManager is the default network management daemon, and it provides two powerful tools for managing connections: the command-line interface nmcli […]
How to Automate Backups with rsync and cron on RHEL 7 Reliable backups are the foundation of any serious system administration strategy. On RHEL 7, rsync combined with cron provides a powerful, scriptable, and highly efficient backup solution that requires no commercial software or complex infrastructure. rsync transfers only changed file blocks over the network, […]
How to Set Up Software RAID with mdadm on RHEL 7 Software RAID (Redundant Array of Independent Disks) allows you to combine multiple physical disks into a single logical device that provides redundancy, improved performance, or both — without requiring a dedicated hardware RAID controller. On RHEL 7, the mdadm utility is the standard tool […]
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