Linux

openssl unable to read/load/import SSL private key from GoDaddy

openssl is the standard open-source, command-line tool for manipulating SSL/TLS certificates on Linux, MacOS, and other UNIX-like systems. I recently ran into an interesting problem using openssl to convert a private key obtained from GoDaddy. Someone else used GoDaddy’s “wizard” interface to generate a certificate signing request (CSR) and private key, and saved the files …

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Nginx default user changed in RedHat/CentOS package nginx-1.16.1-1.el7

The latest Nginx rpm (nginx-1.16.1-1.el7) from EPEL for CentOS/Redhat is a fairly major update, from version 1.12 to 1.16, and includes some very important fixes to address multiple CVEs. There is another small but critical change in the latest RPM that isn’t mentioned in the bug report. RedHat had configured nginx to run as user “apache” …

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MySQL replication fails with WSREP error after restart

Scenario A single Percona MySQL 5.7 server replicates asynchronously with a cluster of Percona MySQL 5.7 servers. After rebooting the single server, replication failed with the following symptoms: mysql> show slave status \G**************************** 1. row ************** Slave_IO_State: Waiting to reconnect after a failed registration on master Master_Host: my-replication-partner Master_User: repl Master_Port: 3306 Connect_Retry: 60 Master_Log_File: …

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Updating to WordPress 5 on a Linux Host: Requesting FTP Credentials

WordPress 5 didn’t install automatically on sites hosted on my CentOS 7 WordPress hosting server. That’s by design, because I’m selfish and I’d rather wait for a few bug-fix releases before making a major upgrade. When I chose to upgrade manually on a test site, WordPress asked for my FTP credentials: If you’re hosting WordPress …

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