Open ports in Ubuntu’s firewall using IP Tables
On the terminal, do the following to open port 80 sudo iptables -A INPUT -p tcp --dport 80 -j ACCEPT sudo iptables -F Persisting the rule changes across boot cy...
Category: Notes
Make a new disk available in Ubuntu on AWS or Azure
To make a new disk you just added to the Ubuntu device, please go through the following steps – Check whats the /dev path of the disk. On terminal, run- Y...
Ubuntu : retain host-name change after a reboot
Problem: The newly set hostname reverts back to older one after reboot Reason : Hostname is reset by cloud-init Solution : Inactivate cloud-init. On terminal, k...
Fixing Cqlsh Import Error
Problem: Running Cqlsh exits with the error : Fix: Set right python path KjKj [/.] Sreekumar programs computers as a hobby and profession. Into programming from...
Fix for – W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial/InRelease Temporary failure resolving ‘archive.ubuntu.com’
Problem: apt-get update gives an error : [bash] W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/xenial/InRelease Temporary failure resolving ‘ar...
View logs and debug a docker service
To debug why a container within a docker stack didn’t start, these commands will help [bash] #list all processes docker service ls #note the id of ...
How to install Docker Compose on Ubuntu 18.04 LTS
Here’s how to install docker-compose on Ubuntu LTS : Open terminal and run these commands [bash] sudo curl -L "https://github.com/docker/compose/rele...
GCloud gives warning : `docker-credential-gcloud` not in system PATH
Problem : On an Ubuntu VM, the Docker pulls from Gcloud private repository give the error [bash] Error response from daemon: unauthorized: You don’t have ...
Python print not displayed in docker console
Problem: Python print function not printing to display when running inside docker Reason: The python output is buffered. Solution: Run python (in the docker fi...
Spring boot and Hibernate Second Level cache giving NoCacheRegionFactoryAvailableException
Problem: Setting below in application.properties, [bash] hibernate.cache.use_second_level_cache=true hibernate.cache.hazelcast.use_native_client=true hibernate....