Showing posts with label linux. Show all posts
Showing posts with label linux. Show all posts
Sunday, June 2, 2024

Solved: "The following security updates require Ubuntu Pro with 'esm-apps' enabled"

›
Situation   When you want to do some operations in Ubuntu using apt/do-release-upgrade you receive the message: "The following security...
Monday, April 29, 2024

Solved: Error: eth0 interface name is not allowed for R2 node when network mode is not set to none in containerlab

›
 Problem:    Containerlab returns a similar error: Error: eth0 interface name is not allowed for R2 node when network mode is not set to non...
Tuesday, February 27, 2024

This is the way to install the telnet command in Alpine Linux (very popular in the container world such as docker)

›
This is the way to install the telnet command in Alpine Linux (very popular in the container world such as docker) #apk update #apk add busy...
Friday, February 23, 2024

The real solution to run ContainerLAB on MAC m1 or m2 apple silicon

›
Step 1: Install Canonical Multipass your MAC  $brew install multipass Step 2: Install the VM called docker $multipass launch docker --name m...
Tuesday, December 5, 2023

BGP: IPv6 Only example between OpenBGPD and FRR

›
FRR: show run frr# sh run  Building configuration... Current configuration: ! frr version 8.1 frr defaults traditional hostname frr log sysl...
Monday, December 4, 2023

How to create an IPv6 route to null/blackhole in Linux

›
 Case:     How to create an IPv6 route to null/blackhole in Linux Command:    ip -6 route add blackhole fd00:12:34::0/48 I hope it is useful
Sunday, October 29, 2023

How to temporarily disable IPv4 on an interface within Linux

›
Case:    We want to disable IPv4 on an interface Solution:    sudo ip -4 addr flush dev enp0s1 Explanation:    The above command removes all...
Friday, October 13, 2023

NGINX Reverse Proxy for an IPv6-Only Server Farm

›
Introduction This work presents a very simple way to offer dual-stack web access to an IPv6-only server farm using NGINX. The continued grow...
Thursday, May 25, 2023

Strange ssh behavior on MAC - Copy/Paste Issues

›
 Situation:    Strange behavior of SSH on MAC, problems with copy/paste in terminal during ssh. Does the clipboard work in other application...
Wednesday, July 13, 2022

Fixing/Solved "Unable to parse package file " after apt

›
Problem:     We get an error after executing any apt command in linux  Solution     The solution is very easy, I spent so many hours fixing...
Sunday, September 26, 2021

Solved: VBoxGuestAdditions.iso (VERR_PDM_MEDIA_LOCKED)Solved:

›
Situation:     When inserting Guest Additions CD Image in a Debian VM you are getting VERR_PDM_MEDIA_LOCKED   Solution:     There are many s...
Wednesday, May 19, 2021

Solved: nping - libnsock mksock_bind_addr(): Bind to 2001:db8:1::1:0 failed (IOD #1): Cannot assign requested address (99)

›
  Problem:   When using nping (which comes with nmap) we receive the message: libnsock mksock_bind_addr(): Bind to 2001:db8:1::1:0 failed (I...
Thursday, September 3, 2020

Solved: Closing connection because of an I/O error in FRR - at least in Ubuntu

›
 If you are getting this message in FRR: Closing connection because of an I/O error in FR The solution is straight forward. You have to comp...
Friday, July 13, 2018

How to run Flask framework to listen in both IPv4 and IPv6 (DualStack)

›
Issue:   How to run Flask framework to listen in both IPv4 and IPv6 (DualStack) Answer:    app.run(host='::',port=5005)
Monday, August 21, 2017

My humble results. Testing ping to loopback using v4 and v6

›
Hello there,   Regarding RTT v4 vs v6 I did something "interesting" recently, would like to know your thoughs.   If you pi...
Monday, February 29, 2016

Read a BGP live stream from CAIDA

›
Objective   Read a BGP live stream from CAIDA and insert them into a BGP session What do we need   bgpreader from the bgpstream core pac...
Tuesday, February 17, 2015

Solution to quagga vtysh "Exiting: failed to connect to any daemons."

›
Description:    When you run the command in the linux shell vtysh to connect to the quagga daemons (such as bgpd, ospfd, etc) returns  the ...
Monday, December 8, 2014

Python Script: Probably useless but functional IPv6 Network scanner

›
Below is the code of what is probably useless but a functional IPv6 host scanner written in Python using threading. To perform a regular (b...
Monday, January 28, 2013

Installing Linux in a Sun Fire Server

›
Introduction: The following describes the procedure for installing the operating system Debian GNU / Linux on a Sun Fire V210 Hardware.  ...
Saturday, January 12, 2013

Error 1017 in Cacti. MySQL. Blank Graphics

›
Error: 4/7/2012 5:37:49 PM - CMDPHP: Poller [0] ERROR: SQL Cell Failed!, Error: '1017 ', SQL: "SELECT count (*) FROM polle W...