Cloudflare’s mission is to help build a better Internet and today April 1st, are releasing a new DNS resolver, 22.214.171.124 - a recursive DNS service. This is not an April fool's joke. Use the following IPv4 addresses for your resolver: 126.96.36.199 and 188.8.131.52. Easy to remember.
# Monitoring /var/log/auth.log for intrusion
# REF: https://unix.stackexchange.com/questions/123029/history-of-ip-addresses-...
# REF: https://unix.stackexchange.com/questions/190907/how-to-retrieve-ip-addre...
# feb 2018
At a recent #ubuntu-us-az meeting, this url was posted as an easy way to generate a password. I kinda liked option 4 which uses perl, available in most Linux distros. Should you not have it, apt-get install perl will install it.
Based on a recent Slashdot post, here's a simple way to measure your Internet speed. The project is on GitHub at https://github.com/sivel/speedtest-cli, and to get the Python-based program, simply do this:
wget -O speedtest-cli https://raw.github.com/sivel/speedtest-cli/master/speedtest_cli.py
chmod +x speedtest-cli
Execute ./speedtest-cli --simple to get your results.
See ./speedtest-cli --help for details.
Recently, I had to flash my laptop BIOS. It had a very old version, A13 and the latest version is A34. But my laptop is running ubuntu 14.04 and the dell site provides a windows exe, E6400A34.EXE. So, this is what I did:
1. I used a small usb drive I have, formatted it fat32
2. went to the DELL site, found the latest bios for my E6400 laptop and saved that file to the usb drive.
3. I d/l the sysresccd iso (about 435MB) from sysresccd.org and burnt it to a CD.
I tend to be on #ubuntu to help others. Today, an interesting question
popped up, how do I clean the old linux images and headers?
Each linux image / header has its own dir in /usr/src/
Let's start, uname -a ... do NOT remove this image
Let's do a sudo apt-get update ... make sure it is clean
If, for some reason, you get errors, try sudo apt-get -f install (fix broken)
Let's get a list of all the images, dpkg -l | grep linux-image