How to permanently mount folder in CentOS home directory with Ubuntu host shared folder in Virtualbox .

  In this post, I'm going to share on  How to  permanently mount folder in CentOS home directory with Ubuntu host shared folder in Virtualbox .

 If you want to mount folder in CentOS home temporarily, please visit my previous post .


What this tutorial will cover 

1. Create a folder to  shareand configure Virtualbox in Ubuntu host .
2. Create a folder to mount in CentOS home folder .
3. Configure CentOS fstab file .

Steps

1) Create a folder to share and configure Virtualbox in  Ubuntu host.

1.1) Create a shared folder in Ubuntu host system.

Create a folder 

I named the folder "CentOS_shared" .

CentOS shared folder

1.2) Open Virtualbox ,go to  "Settings> Shared folders" . Add the newly created folder in Step 1.1 . Click the "blue plus" sign to look for the folder .

Add  the created folder in Virtualbox

Look for folder location

1.3) Choose the folder and click "Open" .

Choose the folder

1.4) Click "Auto-Mount"  box.

1.5) Click "OK" .

1.6) Run  CentOS in Virtualbox. By clicking the "Start" button .

Note: By default, once you share the folder in virtualbox,you can access this folder in CentOS under  "/media" location .

2) Create a folder in CentOS home folder .

2.1) Create a folder  in CentOS home folder . In this example, i create a folder name "Ubuntu_shared" .

Create a new folder in  CentOS home folder

Ubuntu_Shared

/media/sf_CentOS_shared

3. Configure CentOS "fstab" file .

3.1) Open the fstab file .

[orca@pygmy ~]$ sudo gedit /etc/fstab

3.2) Edit "fstab" file .

In the file, add below line .

/media/sf_CentOS_shared /home/orca/Ubuntu_shared bind defaults,bind 0 0

You need to configure the "fstab" file base on what you configure in your system. Below is my CentOS system path and directory details .

/media/sf_CentOS_shared =(Ubuntu shared folder under /media ) 
/home/orca/Ubuntu_shared =(home directory share folder)

3.3)  Save the configuration and reboot your system.
Once rebooted,Ubuntu host shared folder should be mounted automatically and permanently with CentOS folder in home directory .

Read Previous : How to share and mount temporary folder in CentOS home folder and Ubuntu host in Vrtualbox

How to upgrade Virtualbox in Ubuntu or other GNU+Linux Debian Distro using Command Line Interface (CLI)

   In this post, I will share on how to upgrade Virtualbox in Ubuntu or other GNU+Linux Debian Distro . Upgrading Virtualbox will not effect any of your existing Virtual Machine performance.

This post, is in reference to the guide in Virtualbox homepage .I edit some command to make it easy for other Debian user .


What will be covered in this tutorial.

1. Check Virtualbox current version and remove from the system.
2. Update Virtualbox path in Ubuntu/Debian sources list .
3. Download and register Oracle Public Key .
4. Update and Install latest Virtualbox.
5. Check Virtualbox latest version .

Steps

1) Check Virtualbox current version and remove from the system.


orca@PositiveSpace:~$VBoxManage --version

Virtualbox Version

 1.2) Remove existing Virtualbox.

orca@PositiveSpace:~$sudo apt-get remove virtualbox-4.3

Remove existing Virtualbox

2) Update Virtualbox path in Ubuntu/Debian sources list .


2.1) Update Ubuntu or other Debian Sources list file for future update . "(lsb_release -cs)" command will give your distro version.

orca@PositiveSpace:~$sudo sh -c 'echo "deb http://download.virtualbox.org/virtualbox/debian $(lsb_release -cs) contrib" >> /etc/apt/sources.list'

update Ubuntu/Debian Sources list 

2.2) Check "/etc/apt/sources.list"

orca@PositiveSpace:~$cat /etc/apt/sources.list

3) Download and register Oracle Public Key .

orca@PositiveSpace:~$wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | sudo apt-key add -

4)Update and Install latest Virtualbox.

4.1) Update the system .

orca@PositiveSpace:~$sudo apt-get update

update the system

 4.2) Install latest Virtualbox

orca@PositiveSpace:~$sudo apt-get install virtualbox-5.0

Install latest Virtualbox

5) Check Virtualbox latest version .

 5.1) Once finish installed,Go to system launcher and look for Virtualbox.

5.2) Check the latest version of virtualbox under "help"

How to capture system performance graph during boot up in Ubuntu or other GNU+Linux Distro

  



  In this tutorial, I'm going to share on how to capture system performance graph during boot up in Ubuntu or other GNU+Linux Distro .

What will be covered in this tutorial

1. Install Bootchart .
2. Run and View boot up graph .
3. Disable Bootchart in Grub version 2 .

STEPS

1) Install Bootchart .
1.1)  Open the terminal and install bootchart .

orca@PositiveSpace:~$sudo apt-get install bootchart

Install Bootchart

2) Run and view the graph .
2.1) Reboot your system .

Reboot the system

2.2 ) Once rebooted, the graph is generated and stored in "var/log/bootchart" . 

Graph Stored Location

Go to the folder and view the graph by clicking the photo (png file).

Click Photo to view the graph

Bootchart graph example 

 The chart shows the total time taken to boot along the vertical axis, and beneath it shows the time taken by each startup services
to complete .

3) Disable bootchart in Grub version 2 .
3.1) Edit "/etc/dedault/grub"  file .

Edit "/etc/default/grub" file

3.2) Edit  grub and save the file . add  bootchart=disable on the file as below .

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash bootchart=disable"

Add bootchart=disable 

3.3) Update grub configuration for it to take effect .

orca@PositiveSpace:~$sudo update-grub

update grub configuration.

3.4) Reboot the system !

Read Previous : How to remove old kernel in Ubuntu using Ubuntu Tweak

How to share and mount temporary folder in CentOS home and Ubuntu host in Virtualbox .

  In this post , I'm going to share on how to share and mount temporary folder in CentOS home and Ubuntu host in Virtualbox .

What will this tutorial covered.

1) Create a folder and Configure Virtualbox in Ubuntu host .
2) Share and edit a file between Ubuntu Host and CentOS.
3) Create a folder in CentOS home and mount it  with Ubuntu host shared folder.

Steps

1) Create a folder and Configure Virtualbox in  Ubuntu host.

1.1) Create a shared folder in Ubuntu host system.

Create a folder 

I named the folder "CentOS_shared" .

CentOS shared folder

1.2) Open Virtualbox go to  "Settings> Shared folders" . Add the newly created folder in Step 1.1 . Click the "blue plus" sign to look for the folder .

Add  the created folder in Virtualbox

Look for folder location

1.3) Choose the folder and click "Open" .

Choose the folder

1.4) Click "Auto-Mount"  box.

1.5) Click "OK" .

1.6) Run  CentOS in Virtualbox. By click the "Start" button .

2) Share and edit a file between Ubuntu Host and CentOS.

2.1) By default, the shared folder is mount under "/media" in CentOS.

/media

the shared folder in CentOS is under "/media/sf_CentOS_shared"

2.2) Create and edit a file between Ubuntu host and CentOS .

Create a file in Ubuntu host

Edit file

Edit the file details

Check the edited file in CentOS

/media/sf_CentOS_shared

Check the file 

Edit the file

Check the edited file in Ubuntu host .

Note: By default, once you share the folder in virtualbox,you can access this folder in CentOS under  /media location but if you want to temporarily access with CentOS home folder , you need to mount the home folder with Ubuntu host  shared folder .I show on how to do it in below steps .

3) Create a folder in CentOS home and mount it  with the share folder.

3.1) Create a folder  in CentOS home . In this example, i create a folder name "Ubuntu_shared" .

Create a new folder in  CentOS home

3.2 ) Mount the folder  with the ubuntu host folder . Open terminal and run below command .

[orca@pygmy ~]$ id uid=1000(orca) gid=1000(orca) groups=1000(orca),10(wheel),991(vboxsf) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 [orca@pygmy ~]$

"id" command will give the user id and group that we need to use in the next command. Use this info to execute the next command .

[orca@pygmy ~]$ sudo mount -t vboxsf -o uid=1000,gid=1000 CentOS_shared ~/Ubuntu_shared


This command will mount  "Ubuntu_shared"(CentOS home) folder  with "CentOS_shared" (Ubuntu host) . "uid" and "gid"
are the user id and group id value respectively.

Once you configured , "Ubuntu_shared" folder will be accessible  from  Ubuntu host folder "CentOS_shared"

Ubuntu shared folder 

Edit file in CentOs home folder

Edit the file

The file will be updated in Ubuntu host .

To make the folder in CentOS home permanently accessible, you need to configure "fstab"   which you can find on my other post .

Read Next : How to permanently shared folder in CentOS home directory with Ubuntu host shared folder in Virtualbox .

Read Previous : How to install CentOS Guest Addition in Ubuntu Virtualbox