Wednesday, November 8, 2017

Ubuntu File Structure

All filesystems are contained within one directory, The root directory is the top level directory, and all its sub-directories make up the directory hierarchy of needs.

•/bin ­­ binary applications (most of your executable files) 

•/boot ­­ files required to boot (such as the kernel, etc) 


•/dev ­­ your devices (everything from drives to displays) 


•/etc ­­ just about every configuration file for your system 


•/etc/rc.d  contains a number of shell scripts that are run on bootup at different run levels. 


•/etc/X11 ­­ configuration files for the X Window system


•/home ­­ locally stored user files and folders 


•/lib ­­ system libraries (similar to Program Files) 


•/media mounted or loaded devices such as cdroms, digital cameras, etc. 


•/mnt ­­ mounted file systems 


•/opt ­­ location for “optionally” installed programs 


•/sbin ­­ system­only binaries


•/sys ­­ contains information about the system 


•/tmp ­­ temporary files 


•/usr ­­ applications mainly for regular users 


•/var ­­ mainly logs, databases, etc.

Tuesday, October 24, 2017

Changing The Size Of The Preview Images In Explorer

Depending on the screen resolution, the images displayed in the preview in windows explorer are so tiny that similar photographs can barely be distinguished from one another. Is there a way i can make the preview larger?

Changing A Value In The Registry Instead Can Increase The Size Of The Preview

1.Open The Registry Editor And Navigate To The Key “HKEY_CURENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer”.

2.Click on "Edit NEW DWORD-Value".
Name this New Entry “Thumbnailsize”.

3.Double Click On The Entry,Selectthe "Decimal" Ratio Button And Enter A Number Between “32” And “256” The Default Value Is “96”.

4.Enter A Larger Value To Increase The Thumbnail size.Confirm The Change By Clicking On “OK”. Restart windows explorer for the changes to take effect.

Friday, June 9, 2017

Your connection is not private - Chromium_Ubuntu





Error:
Your connection is not private
Attackers might be trying to steal your information from www.google.rs (for example, passwords, messages, or credit cards). NET::ERR_CERT_WEAK_SIGNATURE_ALGORITHM

To resolve the issue in Ubuntu OS through install the Network Security Service libraries package through terminal and restart the Desktop.
sudo apt-get install libnss3-1d

Friday, April 28, 2017

Error: Unable to find ssh binary [code 0x00000436]

Error shows while try to join a Ubuntu 15.04 LTS OS loaded computer to the Windows domain, and its resolved through following steps.

sudo apt-get remove openssh-client (It only removes ssh client package)
sudo apt-get update
sudo apt-get install openssh-server.

Error details:
Unable to find ssh binary [code 0x00000436]

A sshd config file was at {nowhere}, and a sshd binary file was found at
{nowhere}. Exactly one config file and one binary must exist on the system in a
standard location. Uninstall any unused copies of ssh.
Please see the documentation related to sshd configuration options required and
re-attempt the join with "domainjoin-cli join/leave --disable ssh
"

Thursday, July 21, 2016

Remove Guest Session From Ubuntu 14.04 Login Screen

Press Ctrl+Alt+T on keyboard to open the terminal. When it opens, run the command below to edit the config file:

Open /etc/lightdm/lightdm.conf file from your terminal using the following command:

sudo -H gedit /etc/lightdm/lightdm.conf

If the file exists, then just add the following line:

allow-guest=false

Save the file and exit the editor. Reboot your system,

Friday, July 1, 2016

How to disable automatic remote printer installation in Ubuntu



Press Ctrl + Alt + T to open the terminal 

1. Modify the cupsd.conf (/etc/cups/cupsd.conf) file through add the below mentioned 
contents.

Browsing Off
BrowseLocalProtocols none

2. and also add the below mentioned contents in cups-browsed.conf (/etc/cups/cups-browsed.conf) 
file.

BrowseProtocols none

after rebooting the desktop there is no automatically added remote printers visible except
those which we have added manually.

Friday, October 16, 2015

How to disable Ubuntu’s Guest Session

Guest Session - which anyone can log into to the desktop through Guest session – no password required. If you'd restrict access to your computer, 

Ubuntu doesn’t expose an easy option to disable this feature. If you poke around the User Accounts configuration tool, where you might expect to find such an option, you won’t find one. To disable it, we’ll have to edit lightdm.conf, which controls the LightDM display manager (login screen)’s settings.
Open LightDM’s configuration file in a text editor through entering the following commands in Terminal (Ctrl+Alt+T), 

sudo gksu gedit /etc/lightdm/lightdm.conf

You’ll be prompted to enter your password. After you do, it shows contents of the file.
[SeatDefaults]
user-session=ubuntu
greeter-session=unity-greeter

if it is not shows just copy and paste it.

after that add the following line to the end of the file, in the [SeatDefaults] section:

allow-guest=false

Save the file after adding the line.The changes will take effect when you restart your computer.