ip version 6 (ipv6) Configuration on Linux

Auto configuration  is completely independent. Getting the mac address of the card and giving a random ipv6 address.

Static ipv6 configuration
# ——————————————————————————-
auto lo
iface lo inet loopback

auto eth0
allow-hotplug eth0
iface eth0 inet dhcp

iface eth0 inet6 static
address 2001:db8::xxxx:yyyy
netmask 64
gateway 2001:db8::xxxx:yy:zzzz
# —————————————————————————–
Your /etc/hosts file should read localhost serverubuntu//change this to serverubuntu//add your static IP

# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

#— Network Fail logs
#systemctl status network.service
network.service – LSB: Bring up/down networking
Loaded: loaded (/etc/rc.d/init.d/network)
Active: failed since Thu, 09 Feb 2012 00:11:18 -0500; 8min ago
CGroup: name=systemd:/system/network.service
├ 3850 /bin/bash ./ifup 59173567_autom tica boot
├ 3859 nmcli con up uuid 32aea3d4-ce65-42d1-a3ed-6a42c17a2111
├ 25236 /bin/bash ./ifup 59173567_autom tica boot
├ 25245 nmcli con up uuid 32aea3d4-ce65-42d1-a3ed-6a42c17a2111
├ 25507 /bin/bash ./ifup 59173567_autom tica boot
├ 25516 nmcli con up uuid 32aea3d4-ce65-42d1-a3ed-6a42c17a2111
├ 25903 /bin/bash ./ifup 59173567_autom tica boot
├ 25912 nmcli con up uuid 32aea3d4-ce65-42d1-a3ed-6a42c17a2111
├ 26168 /bin/bash ./ifup 59173567_autom tica boot
├ 26177 nmcli con up uuid 32aea3d4-ce65-42d1-a3ed-6a42c17a2111
├ 26427 /bin/bash ./ifup 59173567_autom tica boot
├ 26436 nmcli con up uuid 32aea3d4-ce65-42d1-a3ed-6a42c17a2111
├ 26686 /bin/bash ./ifup 59173567_autom tica boot
├ 26695 nmcli con up uuid 32aea3d4-ce65-42d1-a3ed-6a42c17a2111
├ 27471 /bin/bash ./ifup ALEJANDRO_autom tica boot
├ 27480 nmcli con up uuid f8a46744-7098-4eb6-8902-34df1bd351f5
├ 28228 /bin/bash ./ifup Auto_58915877 boot
├ 28234 nmcli con up uuid 80a61972-1616-431e-bcf3-d4660386ec35
├ 29174 /bin/bash ./ifup Auto_58915877 boot
└ 29180 nmcli con up uuid 80a61972-1616-431e-bcf3-d4660386ec35
Route Commands


Centos Configuration  or  RedHat


cat /etc/sysctl.conf





Docker Shared Mount ( Mount directory from one container to another )



Docker : Use host networking

Using host networking

If you use the host network driver for a container,

that container’s network stack is not isolated from the Docker host.

For instance, if you run a container which binds to port 80 and you use host networking,

the container’s application will be available on port 80 on the host’s IP address.

The host networking driver only works on Linux hosts,

and is not supported on Docker for Mac, Docker for Windows, or Docker EE for Windows Server.


Command Line :

--network host to the docker container create command.

In this case,

if a service container binds to port 80, only one service container can run on a given swarm node.

If your container or service publishes no ports, host networking has no effect.


ispconfig3 ports

How to: Mount a SFTP Folder (SSH + FTP) on Ubuntu Linux using SSHFS & Fuse

Purpose: to mount a remote directory on my local Ubuntu Linux Desktop system using SFTP (which is SSH in an FTP-like fashion).

The goal is to easily gain access to a remote system’s files through another folder on my desktop. Debina/Ubuntu allows you to easily mount SSH folders via the GUI, however, these mounts won’t show up in the terminal (and in some programs).

sshfs to accomplish this.

 Ubuntu’s SSHFS documentation here.

Sshfs and mount


  1. add your username to the fuse group.
    1. On Ubuntu, you would open a terminal window and perform the following:


  • SFTP server. I created a folder on my desktop called sftp.
  • Once the folder has been created, simply run sshfs using the appropriate login information (host username and IP), the host and local directories, and the SFTP connection is mounted on a folder on my desktop.

Ref: creating a bash alias


possible errors and workarounds


Create a bash alias to save time and typing



Hard drive speed test using Linux command line and hdparm

Note that all tests should be run multiple times and average time should be calculated to get more accurate result.

Bypassing hard drive’s buffer cache memory thus reading directly from the disk.

Read data from the second half of the disk that is if the hard drive size is 100GB.

To obtain cached reads run the following command: