Using the command line If you’ve upgraded from past Fedora releases, you are likely familiar with the dnf upgrade plugin. This method is the recommended and supported way to upgrade from Fedora 29 to Fedora 30. Using this plugin will make your upgrade to Fedora 30 simple and easy. 1. Update software and back up
Cassandra is great for storing unknown type and amounts of data. One of the key benefits I like it. When you update a row and the primary matches. It will only update that row instead of adding a new row. With Mysql you had to set the unique option on the column. Git repo https://gitbox.apache.org/repos/asf?p=cassandra.git
Found some interesting commands to free up some virtual memory without a reboot. I did not think the command will work so i ran a test in the lab and sure enough. It works like a charm. just so you can see real time stats sync; echo 1 > /proc/sys/vm/drop_caches To clear inodes sync; echo
Debian Distro upgrade. For this example we are upgrading from jessie to stretch A) # apt-get update # apt-get upgrade # apt-get dist-upgrade sed -i ‘s/jessie/stretch/g’ /etc/apt/sources.list B) # apt-get update (if you receive a error similar to E: Release file expired. run apt-get -o Acquire::Check-Valid-Until=false update ) # apt-get upgrade # apt-get dist-upgrade C)
