MariaDB and MySQL Users, Grants and Remote Access on AlmaLinux 10
Create MariaDB/MySQL admin and least-privilege application accounts, use GRANT, REVOKE and roles, and open AlmaLinux 10 to an application subnet safely.
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Too Many Open Files, Increase Limit CentOS/RedHat
Too Many Open Files, Increase Limit CentOS/RedHat Too Many Open Files, Increase Limit CentOS/RedHat 6 If your application is reaching the “too many open files” error, it’s a good point…
Solaris Run Levels and Init States: init 0/S/1/2/3/5/6, shutdown -i vs init vs reboot
What each Solaris 10 and 11 init state means, how run levels map to SMF milestones, and when to use shutdown -i, init, reboot, halt or poweroff.
Install MariaDB and MySQL on AlmaLinux 10 and Secure It
Install MariaDB 10.11/11.8 or MySQL 8.4 from AlmaLinux 10 AppStream, secure it with mariadb-secure-installation, apply a hardening config and verify.
Configuring DNS and GNS for Oracle RAC SCAN: Three SCAN IPs, Round Robin and Verifying with nslookup
Oracle Infrastructure Series, part 6. Previous: part 5, HAIP vs bonding for the private interconnect. Next up, part 7. Every RAC client connects to one name, the Single Client Access…
Find Linux Server Uptime
Find Linux Server Uptime Find Linux Server Uptime if you have ever needed to check when the last reboot of your Linux server was (if you are like us, it…
Solaris Process Management: ps -ef, pgrep, pkill, kill Signals and nohup
Find, inspect and stop processes on Solaris 10 and 11 with ps -ef, pgrep, pkill, kill and nohup, plus the /proc tools, Solaris signal numbers, SMF and zone gotchas.
PostgreSQL SSL/TLS and PgBouncer Connection Pooling on AlmaLinux 10
Enable SSL/TLS in PostgreSQL 18 on AlmaLinux 10 with a private CA, enforce hostssl and verify-full, add client certificates, then pool connections with PgBouncer using SCRAM auth_query and TLS.
Change Default Printer CUPS CentOS 6
Change Default Printer CUPS CentOS 6 Change Default Printer CUPS CentOS 6 Each Linux system has a default, even if you have a full CUPS Server, the local system default…
Configure DRBD CentOS 6
Configure DRBD CentOS 6 Configure DRBD CentOS 6 DRDB or Distributed Replicated Block Device is nice for HA situations of distributed block devices. This can be used for NAS, SAN,…