How do I mount root in /mnt

I’m currently having a problem with my computer that I have to mount root in /mnt but those things sound strange to me. I couldn’t find any guides in the internet.
After I type ‘sudo blkid’ I don’t know what to do next, I dont know how to determine my root partition.
This is the output:

/dev/sda1: UUID=“A52F-1950” BLOCK_SIZE=“512” TYPE=“vfat” PARTUUID=“4d25495f-6e88-45d3-b305-b2cdae2efd8d”
/dev/sda2: UUID=“9ed878f9-7714-4389-8392-17a0ba24f419” BLOCK_SIZE=“4096” TYPE=“ext4” PARTUUID=“05b070bd-e38a-4310-83f8-d0400dda3670”
/dev/loop0: TYPE=“squashfs”
/dev/loop1: TYPE=“squashfs”
/dev/loop2: TYPE=“squashfs”
/dev/loop3: TYPE=“squashfs”
/dev/sdb1: BLOCK_SIZE=“2048” UUID=“2020-02-28-22-22-41-00” LABEL=“MANJARO_CINNAMON_1901” TYPE=“iso9660”

Welcome at the forum, @poutuop

Why do you have to do this and in a what situation? Your issure remains kind of nebulous… Please provide some more explanations of your problem and if possible about your system as well, e.g. by posting output of the following command to be entered in a terminal window:

inxi -Fxxxza --no-host
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Hi, you don’t usually suppose need that.

There is a script called manjaro-chroot which does the mounting automagically.

It does mount stuff like root of the filesystem to /mnt with only specifying drive

From live manjaro,

sudo manjaro-chroot -a /dev/sdX

Where X is the number of the partition you installed your manjaro.

In case you used full disk encryption, you need to do extra step unlocking the partition.
The tool is called cryptsetup, read on wiki or manpage how to unlock.

Keep in mind your /boot is not mounted with manjaro-chroot so for fixing stuf like GRUB, you would need additionally mount /dev/sdX (the boot partition) to /mnt/boot. After you successfully chroot manjaro to /mnt.


Or read here [Fix] Can’t login - black screen & chroot guide