So I am college student in my freshman year and just installed Manjaro linux on my new laptop. Dual booted along with windows 11 which was the master operating system. So while disk partitioning I forgot to partition the manjaro disk and now I am not able to partition it. I already searched how to do it and I tried Gparted but looks like the disk my manjaro is on is locked or something like that. Most options related to my disk in gparted are locked and the resize option is available but I am not able to enter the new size of the disk after clicking on the resize option. I even tried to move all the os files to one folder and create another folder for my files but the option is create folders is also locked. Please tell me how I can solve this.
Have tried it from the live USB?
You need sudo outside your /home.
Iâd use Nemo and âopen as Rootâ but you can use Dolphin.
Hello Likhith and welcome to Manjaro 
This sounds maybe like a stupid question, but did you used your USB Bootstick (Live Environment) to make this changes?
Partitions that are in use, canât be changed.
Do you really think this is a good idea? 
There will nothing works after you done that.
Linux is not Windows and hell yeah thats a good thing.
Your Root Partition gets default Home user restriction, to protect you.
As @1efaf7d71a8637c6800a mentioned already, you need sudo rights to make changes there.
You normally donât want to make any changes there, as long your system is working as intended. Thatâs why you can use sudo, if you really known what you doing and have a clear focus where your goal is.
If you want to play around with Linux and gain your experience points 
I recommend to use Timeshift (rsync) on a external drive with ext4 partition and create a snapshot.
If you did a mistake, you can restore your system quick and easy from a Live Boot and with the Timeshift GUI that is pre-installed.
First thing to do is to shrink the Win partition with Win tools. GParted could do this as well but NTFS filesystems are better shrinked by Win tools.
Secondly, whenever doing modifications - make a backup upfront.
Third, make sure you fully shut down Win, Fast Startup etc. must be switched off to make sure you really fully shutdown Win, otherwise the filesystem/partitions might be locked. Also, secure boot must be switched off.
If all this is fine you can modify your partitions with GParted from a Live ISO boot.
Alright so basically you are telling me to have a backup disk first right? Ok then what? How to do disk partition? And I also understand that you should not make changes to a /root. So now what?
I mean no offense, but as it does not appear that you know what you are doing, things could easily go wrong by mistake.
Having a backup of the (Windows) system that is now working would therefore be good, just in case.
@Wollie told you - use windows to shrink itâs own partition, so that you have free space to install Manjaro into.
Or do you have more than one disk?
After you have shrunk the partition using Windows itself, you can boot the installer USB and install Manjaro into the free space you just created.
This question doesnât compute for me - what do you mean?
cave:
You sounds really unexperience⌠which is okay.
But then its even more needed to backup all your files (if you have important ones, which you may regret losing), which includes probably Windows aswell.
You may also think about, if you want to use Linux and Windows on 2 seperated drives, because dual boot on a single drive gives you trouble sooner or later.
As we all said already, boot from a USB Stick in Manjaro Live Environment⌠from there you can do all this changes with gparted.
I already installed the linux os in the disk partition. I am asking how to furthur partition the disk space alloted to manjaro linux because I did not do it while installing linux. Now I already used it for 2 days and i dont know how to partition it. I think you have misunderstood that I am still trying to install linux.
I am sorry for not mentioning this sooner but I no longer have that USB. I forgot to mention that in the post. So is there any other way?
Yes - that is definitely the case here.
You may later come to understand why we (me for sure) misunderstood you.
You have installed your system, it is working fine - and now you want to ârepartitionâ it.
You want to give /home or /usr or /var or ⌠itâs own partition, basically.
Of course you can do that - itâs basically the same process, just with Linux.
â boot usb
â shrink the whole Linux partition
â then use the freed space to create new partitions - create file systems on them
â then copy the content of whatever you want to be on the newly created one to there - and delete it from the original place
â then adapt /etc/fstab so that the new partitions get mounted to the proper places once you reboot
Keep the / where it is.
But(!)
Why in $deityâs name would you even want to do this?
It may be much easier for you if you just reinstall and use the manual partitioning method which the installer offers - then you donât need all the shrinking and moving stuff around
⌠which I think you donât really understand - again: no offense intended
definitely not
You need to access the system from the outside (by booting Manjaro or some other Linux system from USB)
in order to be able to shrink the partition that you now have.
This canât be done from within the running system.
You will either need some Linux system you can connect your disk to (a friends, perhaps)
or you need a live system (any Linux will do) which you can boot to access your disk.
Yes and I am sorry for not thinking this thoroughly during installation.
Yeah there is a problem with that my brother. I am sorry but the only guy with a linux is a friend of mine who helped me set this up 2-3 days ago and now he is not here and wont be for months. He went to a college in another city. So nobody near me uses linux now.
Soo⌠yeah I screwed up big time but is there another fix possibly?
How did you screw up?
Does the system run or does it not?
If it does, all you need is a small USB thumb drive to which you install Ventoy and then download a Manjaro (or some other) ISO and copy it there.
⌠no, actually: just leave it like it is if you are not confident to tackle this on your own âŚ
You might have heard the phrase: never touch a running system. 
Ventoy is also available for Windows, btw. - so you donât even need a working Linux to create a new installation medium.
So: all you need is a pretty cheap 4 GB (or greater âŚ) thumb drive.
Thatâs it.
(and a network connection, of course)
Then you can either reinstall again - or practice your Linux skills a bit by re-partitioning, by doing what I described above.
Iâll make the presumption that you can still boot with windows; Yes?
1. Get the Manjaro ISO
Download the latest Manjaro ISO file: Official Images â you should choose the full ISO of your preferred Manjaro version; this is the default ISO anyway, so just click the Download button.
2. Create a Manjaro Installer USB
Create a new Manjaro Installer USB using Rufus (or any other reliable method) â Make sure you select the GPT partitioning scheme in Rufus when creating the USB.
Important: You have asked twice for some magical workaround that wonât require a bootable Manjaro Installer to perform certain tasks â it doesnât exist â Keep this Installer USB as you will very likely need it often, especially given the obvious skill level demonstrated so far.
3. Install Manjaro
Boot with the Manjaro Installer USB and perform a new installation of Manjaro.
Choose the Manual Partitioning Method during install â this allows the greatest flexibility in creating partitions â but it requires you to pay attention; to understand; and to keep your trigger finger off the Next button, until youâre sure each step is completed properly.
Good luck.
Itâs absolutely no issue to not make multiple partitions to separate things, most people donât bother to create a /home partition, this is no issue at all. I myself always have only one partition for everything it is not an issue I do not know why you seem to panic over that. Just let it go everything is fine
For Linux you should have always a Linux Bootstick in background⌠it helps you in all kind of different situation, to solve a problem.
I created a good overview/guide for Linux Newbs, i think its worth it to read it.
Ok I understood thank you. You see I dont even have a usb at homeđ . I mean I never needed one I just have one hard disk as back up device. I will get one now. Thank you for putting up with my stupid questionsđ .
I should mention that (if you have a CD/DVD burner) then burning the ISO to a blank DVD is perfectly fine; as long as you have a method to boot the Manjaro Installer when its needed.
The most common is to create a bootable USB, but many seem to forget that a bootable Manjaro Installer DVD is still a viable option. 
Cheers.
Hallo Likhith_62
You can download the Manjaro and boot it from CD.
Than you can do all the thinks you can do drom USB.
Important: You can collect your Data (when you got already something saved on your PC) an put them to the other Place or USB Stick for âData-Backupâ.
As I startet 1,5 Years ago i tryed too change the System like Windows and crasht it.
I have learnd - whenn System is running, use Timeshift to make a Backup. (I did not learn to write in english, i hope you can read)
Good Luck