Category: Uncategorized

Change the CentOS 7 interface name after new installed

Solution

Step 1: Edit the /etc/default/grub file

In this case, I will using vim editor,

[root@localhost ~]# vi /etc/default/grub

Step 2: After the file open in vim editor, press I to insert the input. The bottom of the file will show you in INSERT mode

Step 3: Add the options below in GRUB_CMDLINE_LINUX variable.

net.ifnames=0 biosdevname=0

Your configuration file will be like this. In red box the variable that we added

Step 4: After the variable added, press ESC and write wq!  To write and quit from vim editor. The bottom of the editor, will show as below and press ENTER

Step 5: Test the configuration with the grub command below

[root@localhost ~]# grub2-mkconfig

The output will show like this and if the done like the redbox below show mean the configuration are correct

Step 6: If there are no errors apply the change:

[root@localhost ~]# grub2-mkconfig -o /boot/grub2/grub.cfg

The output will show like this

Step 7: Next, copy your existing network configuration file to the new interface name. For example, if your interface name was originally ens33

#change the directory to network-scripts directory which is contain all the network interfaces configuration for CentOS 7
[root@localhost ~]# cd /etc/sysconfig/network-scripts
#copy the file from name existing interface name to eth0[root@localhost ~]# cp ifcfg-ens33 ifcfg-eth0

Step 8: Next, open the ifcfg-eth0 file with vim editor and change the variable below:

From

NAME=”ens33”DEVICE=”ens33”

To

NAME=”eth0”DEVICE=”eth0”

You can refer step 2-4 how to use vim to edit the files

The sample of edited file here

Save the file after finish edit the files

Step 9: Remove the old interface config by using command below

[root@localhost ~]# rm -f /etc/sysconfig/network-scripts/ifcfg-ens33

Step 10: Disable NetworkManager by using command below

[root@localhost ~]# systemctl disable NetworkManager

Step 11: Reboot the server

[root@localhost ~]# reboot

Step 12: Restart the network by using command below

[root@localhost ~]# service network restart

When the service restart success the following output will show

You can verify the interface by showing the ip address by using the command below

[root@localhost ~]# ip address

Troubleshooting

If the interface in DOWN state, does not have any ip address / using DHCP to retrieve the IP address, using the following command

[root@localhost ~]# ifup eth0

The output will show like this

After done, try show the ip address one more and your CentOS will get the IP address

Error Word Cannot open the existing file on Microsoft Word on Mac

If you using Microsoft Office 2016 or 2019, you might see the error below. For me it annoyed me and always get me frustrated because I always dealing with open the Word document frequently. The error about it failed to open the file. There are some variations of this error message that you might see. Examples of these variant error messages are “Do you want to replace the existing Normal.dotm” or “Changes have been made that affect the global template. Do you want to save those changes?”

The reason of this error is because Microsoft word failed to open the normal template of the blank document.

Solution for this is by Deleting the file of the Normal.dotm. Below is the step to do so.

  • Open Finder
  • Press (Command + Shift + G)
  • Paste the following directory path to Go to The Folder
    • ~/Library/Application Support/Microsoft/Office/User Templates/ 
  • Search file “Normal.dotm” on search bar and delete both file that
  • After that you can open the Microsoft word without any error anymore.

Thank you!