Hey Hello Guies.
I use Krita for drawing and also for short animations. But I have an animation related question. I have used it in Windows OS a lot. Now I am a Linux user from almost 2 weeks. So last night I was setting up my krita keyboard shortcuts. I noticed some features have differ names now. for example 'create blank frame' (krita in windows) is called 'new frame' now (krita in Linux). Well, My problem is I can't find the "Insert Keyframe 'Right/Left'" feature. I don't know what it is called in the Linux's krita or maybe it's just not available here. So that's my problem. Feel free to correct me. Thank you for helping.

The Create Blank Frame option is there in the latest formal release of krita (version 4.2.8 ) in the Linux appimage. Which version of krita are you using?
Which version were you using in Windows?

New Frame was the old option name that was replaced by Create Blank Frame quite a few versions ago.

Insert Keyframe Left/Right is a pop-out sub-option in the Keyframes option.

If you've just started setting up krita on Linux, you could copy your existing Windows configuration files and resources folder from your Windows system over onto Linux. You would need to have ntfs utilities such as ntfs-3g installed on Linux so that you can read the NTFS Windows partion; or write them from Windows onto an NTFS formatted USB stick. A FAT32 USB stick should work ok for Windows to Linux transfer provided it has been formatted to FAT32 on a Windows system first and is the easiest method to try.

I installed krita from Linux mint software manager. I got version 4.0.1 from there. Yeah, it's old. I was thinking that it's the latest I can get for Linux. I was using Krita 4.1 in windows last time.
So you are saying that I can install Krita 4.2.8. in linux . Can you Please help me installing the latest Krita. I am still just learning, how things work in Linux. Installing apps from outside of software manager will be something I need help for. Well, coping configuration files could be a good idea, but ummm, I don't have any backup. So... its ok, not a big problem.
Thank U for instantly replying.

The best place to get it from is here: https://krita.org/en/download/krita-desktop/

Download the appimage file, then right-click it to get the Properties display. Go to the Permissions tab and tick the Exectute box to allow it to execute as a program. Then the appimage will run as a program when you double-click it. Before you do this, it would be a good idea to uninstall the old version of krita using the Linux Mint software manager.

You'll also need the GMIC appimage file for the GMIC filters (assuming you want to use them) so download that from the same place and also give that execute permissions. You can put them anywhere you like on your computer as long as you can remember where they are. You'll need to point to it from inside Setting -> Configure Krita -> G'Mic-Qt Integration group.

For animation export, you'll need FFmpeg and you can get that from here https://johnvansickle.com/ffmpeg/
Get the amd-64-static one (assuming you have a 64-bit computer) and put that where you like and point to it from the within the Render Animation configuration controls.

Note-1: The krita appimage is not 'installed'. It's an independent executable which is not part of your Linux system's managed repository or recorded software manifest. As such, you're responsible for it and it's up to you to update to version 4.2.9 when that will be released in the near future. You don't need to update the GMIC appimage but it's a good idea to do so. You don't need to update FFMpeg either but again it's a good idea to do so if an update becomes available.

Note-2: I said to put the various files where you like. It's your computer and you're running Linux so you really can put them anywhere you like. In the early stages of learning about Linux it would be easiest to put them in a folder called 'KRITA-APPS' (or whatever) in your Home area and run the krita appimage from there, either manually or make a Mint menu entry pointing to it or whatever launching method you prefer.

The manual is here if you need it: https://docs.krita.org/en/ Good Luck

Thank U for step by step guide and the necessary notes. As a Linux noob all these info will be very helpful for me.
Thank U so much.