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Monday, 24 July 2017

eth0 does not seem to be present after clone or import vm

Find Video here: -


delete /etc/udev/rules.d/70-persistent-net.rule


change mac address in /etc/sysconfig/network-scripts/ifcfg-eth0
generate new UUID for eth0
change UUID of eth0 in /etc/sysconfig/network-scripts/ifcfg-eth0
restart network service

Sunday, 23 July 2017

Centos - Linux network settings Command lines

  • ifconfig -a
  • vi /etc/sysconfig/network-scripts/ifcfg-eth0


  • vi /etc/sysconfig/network
    Ensure GATEWAY= has been set

  • vi /etc/resolv.conf
    nameserver 8.8.8.

  • /etc/init.d/network restart

Saturday, 22 July 2017

To reset Cent OS root Password

Boot or Reboot your CentOS installation

From the console ATL+CTRL+DEL will get you headed in the right direction.

After the installation reboots, it will come up to a boot countdown.


From the GRUB menu, select the appropriate kernel version and press the 'e' key.
You will now be presented with the option menu for the kernel version.

Kernel Options Menu

From this menu, select the kernel /vmlinuz-... line and press the 'e' key.
You will now be presented with the kernel boot options.

Change Kernel Boot Options

Now we need to add to the end of this line one o the following:
1, s, or single
And now press Enter to save your changes.

Boot your temporary options

From this menu, you should already be on the kernel /vmlinuz... line.
Press the 'b' key to boot to these temporary options to allow you to recover your root account.

Set Root Password

Now you will boot up to the root shell and you can use passwd to set your new password.
You will be required to enter the password twice.
Once you have completed this, reboot and you have a new root password for your CentOS installation.

Wednesday, 19 July 2017

To Edit Boot file in Linux or Ubuntu

To customize your GRUB2 settings, you’ll have to edit the /etc/default/grub file and then run the sudo update-grub command.

Configure Network Interface - Linux

  1. Create/edit a file /etc/sysconfig/network-scripts/ifcfg-eth0 containing:
  2. Create/edit the route configuration file /etc/sysconfig/network-scripts/route-eth0:
    default dev eth0