Dolphin is the default Kubuntu file manager application. Blue folder icon, positioned beside launcher button on the panel, run fast, simple by default and powerful when needed, that's Dolphin. Just like what we have discussed at the previous episode, Discover Application Store, we will also explain Dolphin in details with screenshots and further references. We hope this helps every Kubuntu users. Now let's start reading!

 

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This tutorial will show you how to create desktop shortcuts on Kubuntu. Kubuntu is a computer operating system based on Ubuntu with KDE Plasma Desktop technology. Here we use Kubuntu 24.04 LTS "Noble Numbat" which has been released this year. This covers making normal application shortcuts, as well as file, document and even custom command line ones on desktop area for quick access. Finally, we include examples and easy to follow procedures so you can practice it immediately on your computer. Happy computing with Kubuntu and we wish you success!

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This is our recommended stuffs for you after finished Parabola GNU/Linux installation with either GNOME or KDE Desktop. Let's start it!

 

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This tutorial explains how a user can search for files and folders on a Kubuntu computer. This tutorial applies to Dolphin, the file manager of Kubuntu, thus also applies to any other systems that use Dolphin like KaOS and openSUSE.

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Kubuntu computer users can make their Google Drive or Nextcloud accessible right from the file manager. This means quick backup and sharing. Now we will learn how to integrate Kubuntu's file manager, Dolphin, with the online storage, Nextcloud, so we can upload and download files right from our Home folders. Let's go!

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Dolphin is file manager from KDE we can compare to Nautilus from GNOME. Dolphin has a lot of features Nautilus doesn't such as internal terminal and split vertical. Not to mention, unlike Nautilus, it supports a lot of third-party plugins like my 2016' Right-Click Batch Converter. In case you wish to change your file manager to Dolphin instead of Nautilus, but without removing any one, here's the way. I wish your life will be easier with this.

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Straight to the point, the final command line is this:

$ sudo umount -v /dev/sdb?* && udisksctl power-off -b /dev/sdb

Fortunately, you can make shortcut to that long command to be, for example:

$ magic

Explanation goes below. 

There are only 3 steps.

On KDE, more precisely on Dolphin File Manager, press F4 key so you see Konsole appears on its bottom:


To understand the command, we learn first where is the location of our partitions:

$ lsblk

 

Second, we unmount all attached partitions of external hard disk:

$ sudo umount -v /dev/sdb?*

Third, we safely remove the disk drive:

$ udisksctl power-off --block-device /dev/sdb

The final result should present you all partitions disappeared and lsblk shows /dev/sdb no more.


Example above given by considering /dev/sdb as the external disk drive we want to unmount. If lsblk output shows you it's not /dev/sdb but /dev/sdc instead, then use /dev/sdc. And so on.

See? Nothing hard.

Important notes explained below.

• 1) GNU/Linux OS reads every disk drive attached in special identifier, like, /dev/sdb or /dev/sdc. To know them, use lsblk command. 
• 2) The OS reads every partition with number following its disk drive identifier, like, /dev/sdb1 or /dev/sdb2, which is a partition inside /dev/sdb disk drive.
• 3)  
• 4) The umount and udisksctl commands work with special identifier of partitions and disk drives, respectively.
• 5) The -v option of umount command means verbose that is to show the process currently being done. 
• 6) The && sign means making a combination of two commands.

Making short version described below.

To make such long command short, you simply need to create an equation, that is in the .bashrc file of yours. Please be aware that this example is limited to /dev/sdb only, so this is not perfect, and you are free to learn more about this.

1) Edit it with editor:

$ nano ~/.bashrc

2) Scroll down.

3) Write this as new line at bottom:

alias magic="sudo umount -v /dev/sdb?* && udisksctl power-off -b /dev/sdb"

4) Save:
Ctrl+O

5) Exit:
Ctrl+X

6) Try it out:

$ magic

Enjoy!

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This article is licensed under CC BY-SA 3.0.

Here's once again traditional article to help new users use Kubuntu 19.04 for their first time. This article suggests you some stuffs after you have installed Kubuntu successfully. I divided the materials into 3 parts, about file manager, System Settings, and workspace. You will find here quick guides to setup Dolphin as you wish, create new shortcut keys, and rearrange desktop to your needs, and more. In the end, I added short workaround to lock your folders safely using Kubuntu built-in Plasma Vault. Have fun with Kubuntu. Happy working!

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Continuing first part, in this part you will learn how to organize your data, this involves displaying your files & folders, finding programs, sorting and arranging, and accessing disk partitions & external storages. Yes, this means you can also place shortcuts on desktop area & panel. On Debian KDE, this is very easy. Once again, you can get Debian KDE in the website. Enjoy!

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Master the file manager of Kubuntu. Like everyone using Windows masters Explorer, then in using Kubuntu, you should master Dolphin. This 4th article explains the Kubuntu file manager to enable you find your files & folders, opening files, sorting and grouping by type, and finally accessing partitions and drives you have.

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KDE Image Menu or KIM is a free software by Charles Bouveyron. It is actually a plugin for Dolphin file manager, and a front-end for ImageMagick software collection. One advantages from KIM is it allows you to manipulate (convert, compress, resize, rotate) many image files simultaneously by one click. This article introduces how to use KIM for those manipulation activities including some examples. KIM is available for KDE 4 and 5. So every Kubuntu version can use it for now.

We have explained how to install KIM in KDE Plasma 5. Now, we need to explain the same in KDE Plasma 4. KDE 4 and 5 are a little bit different so we need also different explanations to install KIM.

KIM (KDE Image Menu) is a third party plugin for KDE to add context menu (the right-click) able to do convert and resize to image file. KIM is very useful because it adds those convert and resize options into the right-click in Dolphin when you browse image files. It can do those manipulations to both every single image and many images simultaneously. Just click and done. This article introduce how to install KIM in KDE 5 because it needs special treatment compared to KDE 4. KIM is free software and licensed as GNU GPL 2.

Now after Caja, we bring Dolphin. It is KDE file manager. We find Dolphin on Kubuntu, openSUSE, Slackware, or any other distro using KDE. We will explain briwfly how to use Dolphin to manage file and folder in Linux. We use Dolphin 14.12.3 in Kubuntu 15.04 here. We hope this will help any new users. Enjoy.

Overview

 

1. Main toolbar. It consists of toolbar itself plus Control button (menubar inside a button, just like latest Chrome or Firefox web browser).
2. Address bar (breadcrumb or text).
3. Left Sidebar. By default, Dolphin has Places style.
4. Status bar. It consists of status indicator, zoom slider, or folder size bar.
5. Right Sidebar. By default, it is file preview panel.

Concepts

1. Dolphin is an advanced file manager. By functionality, it is closer to Windows Explorer than any other file manager programs.
2. Dolphin has split view, tree view, and show in groups feature while another file managers don't have it anymore.
3. Dolphin builds its visual appearances from components. Sometimes it is toolbar, sometimes it is panel. Every component can be added, modified, or removed. So it is possible to create custom toolbar with your choosen buttons in Dolphin, just like LibreOffice Writer toolbars.
4. Dolphin has many panels. For example, tree view in Dolphin is treated as a special panel, named Folders Panel (F7).
5. Dolphin doesn't have menubar by default, moved into single button Control.

Split View

To split view in Dolphin, press F3. Press it again to revert back.

New Tab

To open a new tab, press Ctrl+T. Press Ctrl+W to close it.

New Folder

To create a new folder, right-click main area > Create New > Folder. You can't use Ctrl+Shift+N by default because that shortcut has been used as New Window.

Sort By

Dolphin is the only one file manager to do file sorting (by date or else) + Show in Groups. This feature can help us to easily differ a file from a another files in a folder. You ill find this feature in Windows Explorer too. To achieve this,

1. Open menu Control > Sort By > Date then select Descending.
2. Open menu Control > Sort By > Descending.
3. Open menu Control > Show in Groups.

This is our default view in Dolphin. If you want the other, change Date by Name, Type, or Size.

Search

To search file in Dolphin, press Ctrl+F. Press Esc to revert back. Remember that KDE Baloo component needs some times (a few minutes) since the first run to index your files. Baloo is the new Nepomuk, the file indexing service in KDE. Baloo in KDE is similar with Google Search Engine in the web.

Tree View

Tree view in Dolphin is achieved by adding Tree Panel (Folders Panel) manually. To do it, press F7 or access Control > Panels > Folders. See picture below. Red box means how to do it, green box means the result. You may edit the panel positions by unlocking panel first then drag them then lock them again.

Change Folder Logo

To change folder image, right-click a folder > Properties > click folder logo > select one image. In this example, we change default logo into red folder logo.

Integrated Terminal

To open Terminal directly inside Dolphin, press F4. To close it, press F4 again. It is an embedded Terminal, no need to open different window. Probably it is the most used/needed Dolphin feature for a Linux user.

I have a Windows-user habits even if I use Linux now. One of them is sorting files by type and show them in groups in file manager. The file manager I know capable for it is Dolphin. Dolphin is KDE file manager. It is included by default in Kubuntu. I will show you how to achieve it easily and how to change by a single click.

Dolphin with Show in Groups and Sort by Date View