Epidemiology & Technology

Blog Archive

WordPress .htaccess

Enable Modules HTTP to HTTPS redirection of within site links Expires ensure that the deflate, headers and expires modules are enabled Apache Settings for speed Other .htaccess settings
March 29, 2020

Getting WordPress to work on 18.04 behind reverse proxy on SSL

On Nginx Reverse Poxy Create a configuration file in sites-available directory and symlink it to sites-enabled Files Limit on Reverse Proxy https://www.claudiokuenzler.com/blog/850/nginx-socket-failed-24-too-many-open-files. The default is set to a limit of 4096 files per (worker) process, which can be seen in /etc/default/nginx: EDITING THIS FILES DOES NOT HELP. Instead edit /etc/security/limits.conf:
March 25, 2020

Ubuntu Server 18.04 Initial Setup

Network Configure Network through Netplan Hostname Change the Hostname through hostnamectl Ensure that the changed hostname is preserved during system reboots Time zone and Date Time Synchronization sudo hostnamectl set-hostname SERVERNAME SSH Cockpit Firewall Rules Install Some Utilities
March 23, 2020

Stata 15 installation on Ubuntu 18.04

Install dependencies Untar the files in /usr/local/stata15. Install Stata and add your license information. Add the directory to path Log out and re-login to initialize the path Start Stata
October 17, 2019

Ubuntu KVM VMM

Check Prerequisites Install libvirt, Qemu, and Virtual Media Manager Add current user to the kvm group and the libvirt / libvirtd group based on your ubuntu version Verify ownership of socks files Check networking
September 21, 2019

Ubuntu Initial Setup

Update applications and add some essential tools This also add MS fonts such as Arial, Time New Roman etc.. Dropbox Thereafter complete the dropbox installation LibreOffice Latest Create 4096 bit SSH Key Edit the SSHD_config file KeypassXC Start KeypassXC. In settings, enable browser integration, disable close on exit. Install the
September 15, 2019

Ubuntu Users and Groups

Add a new user Manage Groups
September 10, 2019

Ubuntu Hostname Change

Ubuntu 18.04 Server When using libvirt / Virtual media manager for cloning a KVM based Ubuntu Server virtual machine, we should change the hostname of the cloned VM after first reboot. Here is the code to accomplish this Reboot Check Hostname Ubuntu 18.04 Desktop On Ubuntu 18.04 desktop, cloud-init is
September 8, 2019

CUPS Printer Autodiscovery of networked printers in Ubuntu

To stop Auto-discovery of Other networked printers on a computer running Ubuntu To stop broadcasting-This computers printer on the network AVAHI Daemon In current version of ubuntu, zeroconf / bonjour protocol based autodetetction of printers and network devices takes place. this is handled by AVAHI daemon. it is NOT a
August 30, 2019

Samsung M2020 Printer in Ubuntu

SULDR files from https://www.bchemnet.com/suldr/ Download the Keyring File https://www.bchemnet.com/suldr/pool/debian/extra/su/suldr-keyring_2_all.deb. Install it Official packages from HP Download the ULD from https://support.hp.com/us-en/drivers/selfservice/swdetails/samsung-xpress-sl-m2021-laser-printer-series/16462598/swItemId/fp-194243-2 Press Enter till you reach Point 10 of the license agreement. It is just 2-3 lines and then you will exit the installer if you press exist once more. Therefore
August 30, 2019