General

A handy little script to output which Ceph OSD it mapped to which drive serial number: #!/bin/bash DISKS=`ceph-disk list | grep "ceph data"` old_IFS=$IFS IFS=$'n' #echo $DISKS for DISK in…

From time to time you might need to create partitions manually in order to install Ubuntu on a specific hard drive in a multi-drive PC. Get started by deleting all…

When working on the frontend for Spring web apps, you will probably have come across an issue where you'll need to reload the app each time you change one line…

Thunderbird on Ubuntu sometimes displays enlarged icons for mails containing certain emoticons. To solve this you can run the following command: sudo apt-get install fonts-symbola

It can sometimes be quite a mission to get Nvidia graphics cards working correctly with Ubuntu/Linux. I recently encountered an issue where after installing the drivers (for the GTX 1060)…

A nice simple query to find duplicate rows in MySQL: SELECT COLUMN_NAME, COUNT(*) c FROM TABLE GROUP BY COLUMN_NAME HAVING c > 1; Credit to the Tin Man

ALTER USER 'root'@'localhost' IDENTIFIED BY 'new_password';

When using self-signed certificates you might come across the following error: > "javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target" To solve…

To mount an NFS share in Ubuntu you need to install nfs-common: sudo apt-get install nfs-common Next, create the directory to which you would like to mount the share: sudo…

To remove a node from a Proxmox cluster you will need to SSH into any node other than the one you want removed. Next, identify the name of the node…