Why do 2 subdirectories appear with different names in different file situations

Question

Regarding 20.04, KDE Plasma. Subdirectories in question are '/extra' and '/home'. Both are mounted on their own partitions.

Perhaps 3 years ago, I installed a new hard disk, and during that installation, I appear to have used '/extra2' and '/home2' to copy from source to destination (the new HD).

Why do certain file-operation windows show what appears is the true system names for said locations, and other file-operation windows show '/extra2' or '/home2'? These names work fine, but I'd like to get to the bottom of this.

Answer 1

Ok, I understand what's going on, seeing 'extra2' and 'home2'. @mook765's suggestion about 'lsblk -f' helps alot. Those are PARTITION LABELS, which I believe are optional and can be designated when creating the partitions. I thought they were phantom disk mount points, or something such. Why Dolphin chooses to display them as a 'bookmark' I don't know. This is not a problem, so, nothing to chase. Appreciated the assistance.

Addendum: Here are the specific steps I took to remedy the situation:

sudo cp -n /etc/default/grub /etc/default/grub.bkup

sudo vi /etc/default/grub

1. disable GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" by adding # at the beginning
2. set GRUB_CMDLINE_LINUX="" to GRUB_CMDLINE_LINUX="text"
3. remove # from the line GRUB_TERMINAL="console" to disable graphical terminal.

sudo update-grub

sudo systemctl set-default multi-user.target

(restart system, comes up into console mode, log in as 'root')

(to change the filesystem labels, partitions need to be unmounted) umount /extra

umount /home

(this removes the '2' from labels '/extra2' and '/home2')

e2label /dev/sdc1 extra

e2label /dev/sdc2 home

mount /extra

mount /home

(check that changes have happened)

lsblk -f

sudo mv /etc/default/grub.bkup /etc/default/grub

sudo update-grub

sudo systemctl set-default graphical.target

shutdown -r now

File manager 'Dolphin' now looks UN-problematic. Good luck.