Articles, Tips, and How-To's for Linux
I ran into an issue where smokeping wasn’t starting on boot on my fedora 24 systems. Checking the output of: systemctl status smokeping Showed me that dns requests were failing and smokeping terminated. So here’s how I fixed it.
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So I recently ran into an issue where we had the following setup: Active Directory Domain Realm joined RHEL 7 Hosts A requirement for UNIX Attributes set in AD sshd_config AllowGroups restrictions However, the RHEL 7 hosts were not able to display secondary/supplementary groups in AD … “SSSD, AD UNIX Attributes, and SSH AllowGroups”
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I spent about an hour scratching my head trying to figure out why my name based vhosts stopped working in Apache 2.4 after I setup Varnish. The answer was quite simple and I will freely admit my embarrassment in case it saves anyone else some … “Break/Fix: Varnish 4 and Apache Vhosts”
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I’ve currently moved from my old host to Digital Ocean. I’m back to running the site off a server in my closet. Hopefully, I’ll have a post on that soon as well. Briefly though, here are some specs…
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The Linux Documentation Project is now being mirrored here. I’ve also added a link to it on the menu up top.
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I had an earlier post regarding a basic HAProxy install that will work fine if your site(s) can tolerate some down time should something happen to your server/instance running HAProxy. While this might be acceptable for a personal site, it quickly becomes unacceptable should your … “How-to: Basic HAProxy Active/Backup Example Configuration (keepalived) for CentOS/RHEL 6”
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The full error may look something like this: ————————————————————————- rpmdb: Lock table is out of available locker entries error: db4 error(22) from db->close: Invalid argument error: cannot open Packages index using db3 – Cannot allocate memory (12) error: cannot open Packages database in /var/lib/rpm ————————————————————————-
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This is a basic HAProxy configuration example that should get you up and running with the simplest of setups. This configuration will have the HAProxy Info page listening on 8080 (adjust as needed) with username/password authentication. In addition, it will also look for http://yourip/healthcheck in … “How-to: Basic HAProxy Example Configuration for CentOS/RHEL 6”
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Recently, I was somewhat bored and decided to switch from a MySQL 5.1 backend to MySQL 5.5 for my site (of which you have the distinct pleasure of reading). While doing a little Googling, I remembered MariaDB. MariaDB is marketed as “An enhanced, drop-in replacement … “How-to: Switching WordPress from MySQL 5.1 to MariaDB 5.5 on CentOS/RHEL 6”
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I recently ran into an issue in which changing the permalinks setting in WordPress resulted in 404 pages across my site. I checked my WordPress root dir and the proper .htaccess file was there with the proper permissons, but permalinks refused to work. It turned … “Break/Fix: WordPress Permalinks 404 Issue”
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