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Top Nav Reliable Penguin Support Contact What’s My Navigation Reliable Penguin - Blog Linux Server Migrations, Systems Administration & Programming Search for: Home Main Nav Home Apps DNS GlusterFS Samba File Server LDAP Web WordPress Expression Engine Magento Drupal Cloud Amazon AWS RackSpace Cloud DNS Cloud Load Balancers Cloud Networks Cloud Servers Databases MySQL Oracle Percona Webservers Apache Nginx Squid Proxy Tomcat Varnish Email Plesk Scripting Misc Return to Content WordPress Cron With HTTP Auth By admin on May 7, 2024 in WordPress If you have a WordPress site that is password protected with HTTP Basic Auth, then you may encounter problems with the WordPress cron failing to run. A workaround is to install the WP Cron HTTP Auth” from here: WP Cron HTTP Auth After you install and activate the plugin, go to Settings-WP Cron HTTP Auth” and enter the HTTP Basic Auth credentials. 0 Find wp-admin url – iThemes Security / Solid Security By admin on April 26, 2024 in WordPress Quick way to find the wp-admin login slug on WordPress sites with iThemes Security or Solid Security installed: wp option pluck itsec-storage hide-backend slug 1 wp option pluck itsec - storage hide - backend slug If the sub-name changes then try: wp option get itsec-storage | grep slug 1 wp option get itsec - storage | grep slug 0 How-to Change UUID Of A Disk By admin on September 25, 2023 in Linux When cloning or restoring disk volumes is possible to run into problem which conflicting UUID values. Each disk volume needs to be assigned a unique UUID. The UUID is store on the volume. A cloned or restored disk will have the same UUID as volume from which it was generated. By default you are not allowed to mount two volumes with the same UUID. This can overcome with the nouuid” mount option: mount -o nouuid /dev/xvdg1 /mnt 1 mount - o nouuid / dev / xvdg1 / mnt Often a server will be configured to select the root partition on boot by UUID. This makes is easy to ensure that the right volume is selected as the root. But if you have two volumes with the same UUID then the kernel will randomly select which volume to mount. This situation can occur when you’ve mounted a cloned or restored copy of the root volume and then reboot without removing the clone. To list the UUID of all devices use the blkid” command: # blkid /dev/nvme0n1p1: LABEL="cloudimg-rootfs" UUID="7cd9f6d2-bc78-4a5c-a12a-XXXXXXXX" 72" BLOCK_SIZE="4096" TYPE="ext4" PARTUUID="92323da4-8b16-40b7-9640-XXXXXXX" 1 2 # blkid / dev / nvme0n1p1 : LABEL = "cloudimg-rootfs" UUID = "7cd9f6d2-bc78-4a5c-a12a-XXXXXXXX" 72 " BLOCK_SIZE=" 4096 " TYPE=" ext4 " PARTUUID=" 92323da4 - 8b16 - 40b7 - 9640 - XXXXXXX " A new unique UUID can be generated with the uuidgen” command: # uuidgen 287d622b-f7d2-4ef8-a266-XXXXXXXX 1 2 # uuidgen 287d622b - f7d2 - 4ef8 - a266 - XXXXXXXX The UUID of an XFS volume can be changed with: # xfs_admin -U 287d622b-f7d2-4ef8-a266-XXXXXXXX /dev/nvme4n1p2 1 # xfs_admin -U 287d622b-f7d2-4ef8-a266-XXXXXXXX /dev/nvme4n1p2 Or let xfs_admin handle generating the new UUID: xfs_admin -U generate /dev/xvdg1 1 xfs_admin - U generate / dev / xvdg1 For ext2/3/4 the tune2fs command can be used: uuidgen 287d622b-f7d2-4ef8-a266-XXXXXXXX tune2fs /dev/xvdg1 -U 287d622b-f7d2-4ef8-a266-XXXXXXXX 1 2 3 uuidgen 287d622b - f7d2 - 4ef8 - a266 - XXXXXXXX tune2fs / dev / xvdg1 - U 287d622b - f7d2 - 4ef8 - a266 - XXXXXXXX Or in a single line: uuidgen | xargs tune2fs /dev/xvdg1 -U 1 uuidgen | xargs tune2fs / dev / xvdg1 - U WARNING: Changing the UUID of an actively mounted disk volume can have unpredictable effects. Always work on unmounted volumes. 0 Plesk / Nginx Open Files Limit By admin on January 25, 2022 in Nginx , Plesk Was trying to increase open files limit for nginx on a Plesk server following instructions here: MariaDB on CentOS 7 – Error in accept: Too many open files” But the limit was not changing. After digging around I found that Plesk was overriding with a config file here: /usr/lib/systemd/system/nginx.service.d/limit_nofile.conf 1 / usr / lib / systemd / system / nginx . service . d / limit_nofile . conf As described here: https://support.plesk.com/hc/en-us/articles/213938485-nginx-fails-to-start-reload-on-a-Plesk-server-Too-many-open-files the easy way to fix open file limit on Plesk is to use: /usr/local/psa/admin/sbin/websrv_ulimits set 100000 no-restart 1 / usr / local / psa / admin / sbin / websrv_ulimitsset 100000no - restart 0 Fixing Size of a request header field exceeds server limit.” error By admin on October 15, 2021 in Apache , Uncategorized This error from Apache is typically caused by a very large cookie. In Apache the LimitRequestFieldSize” directive sets this limit. The default is 8190 bytes. To change the file create a file at: /etc/httpd/conf.d/custom.conf or /etc/apache2/conf.d/custom.conf containing the desired change: LimitRequestFieldSize 16384 1 LimitRequestFieldSize 16384 Reload Apache after adding the file with: /sbin/service apache2 restart or /sbin/service httpd restart 0 1 2 … 85 Next → Reliable Penguin provides systems administration , website and server migrations , web hosting and software development . 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