Back up and restore PostgreSQL 18 on AlmaLinux 10 with pg_dump, pg_dumpall –globals-only and pg_basebackup, verify backups with pg_verifybackup, and schedule nightly dumps with a systemd timer.
Plan a two-node Oracle RAC 19c cluster on Oracle Linux 9: server sizing, ASM disk groups and voting files, public and private networks, node VIPs, SCAN and DNS records.
Umask CentOS 6 Permissions Umask CentOS 6 Permissions Let’s face it, the default perimssions for CentOS 6 are a pain. Basically only owner can do anything, it completely ignores basic…
Build a least-privilege PostgreSQL 18 permission layout on AlmaLinux 10: owner, read-only and read-write group roles, login roles, CONNECT and schema grants, ALTER DEFAULT PRIVILEGES, pg_hba.conf group rules, and safely dropping roles.
Part 1 of the Oracle Infrastructure Series: how RAC, Grid Infrastructure, ASM, Data Guard and GoldenGate fit together on Oracle Linux 9 with Oracle 19c, plus 23ai/26ai differences.
Setup SSH Password-less Login Linux Setup SSH Password-less Login Linux if you have not yet, install openssh-clients on BOTH Systems the first thing you want to do is setup the…
Install PostgreSQL 18 on AlmaLinux 10 from AppStream or the PGDG repo, run initdb, configure pg_hba.conf with scram-sha-256, and allow remote access through firewalld with SELinux enforcing.
send different username ssh-keygen CentOS send different username ssh-keygen CentOS say you setup ssh-keygen on an account on your external computer to a network server, it works great as long…
Step-by-step guide to troubleshooting stuck and hung NFS mounts on AlmaLinux 10: hard vs soft mounts, D-state processes, stale file handles, forced and lazy unmounts, rpcinfo, nfsstat, tcpdump and server-side checks.
firewall-cmd cheat sheet for RHEL, AlmaLinux, Rocky Linux, Oracle Linux and CentOS Stream: zones, services, ports, rich rules, NAT, policies, IP sets and troubleshooting.
