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 solutions, like: 

1) Executing 

  sudo apt-get upgrade 

  sudo apt-get install virtualbox-guest-additions-iso

2) Removing and inserting the cd from the VM configuration

and a third one which is the one that worked with me:

a) Start the VM

b) Open a terminal

c) Execute this:

  sudo su

  cd /media

  mkdir cdrom

  mount /dev/cdrom /media/cdrom

  cd cdrom

  sh VBoxLinuxAdditions.run

Hope this helps.

Alejandro,

Solved: GNS3 - Private Vlan - non-operational - Cisco

Status:

  In summary: private vlan are not working in GNS3, not even using IOU or VIRL

Solution:

  User IOU i86bi-linux-l2-adventerprisek9-15.2d.bin

Test:

IOU3#show vlan private-vlan 

Primary Secondary Type              Ports

------- --------- ----------------- ------------------------------------------

500     501       community         Et0/1, Et0/2, Et1/0

500     502       isolated          Et0/0, Et0/3, Et1/0

Good luck!,

Super easy script - Python3 & optimizing every table of a mysql db

 #!/usr/bin/python3.3

#The objetive of this script is to find all tables in a MYSQL DB and opmitize all of them

import dbconnect

import time

from datetime import datetime

## // VARIABLE DECLARATION ##//

startTime = datetime.now()

conn = dbconnect.dbconnect()

conn.autocommit(True)

cur = conn.cursor()

print ("Starting time: ", startTime)

SQLQUERY=("SHOW TABLES") #Find every table in the DB

cur.execute(SQLQUERY)

tables = cur.fetchall()

if len(tables)>0: #Prevent there are not tables in the list

  for table in tables:  #For every table in the DB

    try:

      SQLQUERY="OPTIMIZE TABLE "+ table[0]  #Construct the SQL QUERY

      print ("   Optimizing", table[0])

      cur.execute(SQLQUERY)

    except:

      pass

print ("Script execution time:",datetime.now()-startTime)

print ("Ending time: ", datetime.now())

print ("******** ****** ")

IPv6 Deployment - LACNIC region

The video below shows the IPv6 deployment for the LACNIC region using a Bar Chart Race format

Made with https://flourish.studio/

Solved: Finder on MAC does not find any files in its searches

Problem:

   Finder can't find files when searching.

Solution:

   I know there are many solutions, many with spotlight in system preferences, but the one that worked for me was to open a terminal window and run/execute:

  #sudo mdutil -E /

    I hope this is useful

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 (IOD #1): Cannot assign requested address (99)

Current situation:

  The issue is that nping can not bind to the IP 2001:db8:1::1

Solution:

  There could be many different solutions, I'm only going to mention one.  What I did was to create a logical interface (tunnel type) with the IPv6 address I was needing (2001:db8:1::1). Here you have the commands.

ip tuntap add mode tun dev tun1

ip -6 addr add 2001:db8:1::1 dev tun1

ifconfig tun1 up

Finally, you could execute something like:

nping -6 -S 2001:db8:1::1 --tcp-connect -c 2 -p 53 <ipv6_dest> --source-mac 00:50:XX:XX:XX:35  --dest-mac 2c:XX:XX:XX:44:20

Hope this is useful

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 compile FRR with this flag:

--enable-systemd

So, it would be something like:

./configure \

    --prefix=/usr \

    --includedir=\${prefix}/include \

    --enable-exampledir=\${prefix}/share/doc/frr/examples \

    --bindir=\${prefix}/bin \

    --sbindir=\${prefix}/lib/frr \

    --libdir=\${prefix}/lib/frr \

    --libexecdir=\${prefix}/lib/frr \

    --localstatedir=/var/run/frr \

    --sysconfdir=/etc/frr \

    --with-moduledir=\${prefix}/lib/frr/modules \

    --with-libyang-pluginsdir=\${prefix}/lib/frr/libyang_plugins \

    --enable-configfile-mask=0640 \

    --enable-logfile-mask=0640 \

    --enable-snmp=agentx \

    --enable-multipath=64 \

    --enable-user=frr \

    --enable-group=frr \

    --enable-vty-group=frrvty \

    --with-pkg-git-version \

    --enable-systemd

    --with-pkg-extra-version=-MyOwnFRRVersion

you can follow those instructions and adding my previous solution:

http://docs.frrouting.org/projects/dev-guide/en/latest/building-frr-for-ubuntu2004.html