Hi,

So just out of nowhere, my Linux Mint started receiving Read-only file system errors and I'm unable to use some functions such as apt update && apt upgrade and I also can't start VMs on Oracle VM VirtualBox. I haven't tinkered anything much up until this point. I use VMs to practice my Linux knowledge. Also, my entire Google Chrome history got suddenly removed.

Here is one part of the dmesg output from this morning:

[Jan22 05:11] systemd-journald[396]: Failed to write entry (21 items, 531 bytes), ignoring: Read-only file system
[   0.000871] systemd-journald[396]: Failed to write entry (22 items, 739 bytes), ignoring: Read-only file system
[   0.000117] systemd-journald[396]: Failed to write entry (22 items, 750 bytes), ignoring: Read-only file system
[   0.000069] systemd-journald[396]: Failed to write entry (22 items, 651 bytes), ignoring: Read-only file system
[   0.000077] systemd-journald[396]: Failed to write entry (22 items, 739 bytes), ignoring: Read-only file system
[   0.000071] systemd-journald[396]: Failed to write entry (22 items, 750 bytes), ignoring: Read-only file system
[   0.000069] systemd-journald[396]: Failed to write entry (22 items, 739 bytes), ignoring: Read-only file system
[   0.000077] systemd-journald[396]: Failed to write entry (22 items, 750 bytes), ignoring: Read-only file system
[   0.000065] systemd-journald[396]: Failed to write entry (22 items, 739 bytes), ignoring: Read-only file system
[   0.000077] systemd-journald[396]: Failed to write entry (22 items, 750 bytes), ignoring: Read-only file system
[   0.000068] systemd-journald[396]: Failed to write entry (22 items, 739 bytes), ignoring: Read-only file system
[   0.000070] systemd-journald[396]: Failed to write entry (22 items, 750 bytes), ignoring: Read-only file system
[   0.000072] systemd-journald[396]: Failed to write entry (22 items, 739 bytes), ignoring: Read-only file system
[   0.000075] systemd-journald[396]: Failed to write entry (22 items, 750 bytes), ignoring: Read-only file system
[   0.000076] systemd-journald[396]: Failed to write entry (22 items, 739 bytes), ignoring: Read-only file system
[   0.000076] systemd-journald[396]: Failed to write entry (22 items, 750 bytes), ignoring: Read-only file system
[   0.000071] systemd-journald[396]: Failed to write entry (22 items, 739 bytes), ignoring: Read-only file system

Also, I do have enough memory on the system even though it's almost full:

df -h
Filesystem      Size  Used Avail Use% Mounted on
udev            3.8G     0  3.8G   0% /dev
tmpfs           783M  1.7M  781M   1% /run
/dev/sda2       219G  181G   28G  87% /
tmpfs           3.9G  1.5G  2.5G  38% /dev/shm
tmpfs           5.0M  8.0K  5.0M   1% /run/lock
tmpfs           3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/loop0      128K  128K     0 100% /snap/bare/5
/dev/loop3       56M   56M     0 100% /snap/core18/2284
/dev/loop2       66M   66M     0 100% /snap/gtk-common-themes/1515
/dev/loop1       56M   56M     0 100% /snap/core18/2253
/dev/loop6      163M  163M     0 100% /snap/gnome-3-28-1804/145
/dev/loop4       66M   66M     0 100% /snap/gtk-common-themes/1519
/dev/loop7      5.8M  5.8M     0 100% /snap/notepad-plus-plus/331
/dev/loop5      3.0M  3.0M     0 100% /snap/ksnip/386
/dev/loop8       43M   43M     0 100% /snap/snapd/14066
/dev/loop9       65M   65M     0 100% /snap/prospect-mail/16
/dev/loop10     3.0M  3.0M     0 100% /snap/ksnip/407
/dev/loop11     6.0M  6.0M     0 100% /snap/notepad-plus-plus/335
/dev/loop12     165M  165M     0 100% /snap/gnome-3-28-1804/161
/dev/loop13     112M  112M     0 100% /snap/whatsapp-for-linux/29
/dev/loop14     304M  304M     0 100% /snap/wine-platform-5-stable/16
/dev/loop15     323M  323M     0 100% /snap/wine-platform-6-stable/8
/dev/loop16     323M  323M     0 100% /snap/wine-platform-6-stable/14
/dev/loop17     304M  304M     0 100% /snap/wine-platform-5-stable/18
/dev/loop18     261M  261M     0 100% /snap/kde-frameworks-5-core18/32
/dev/loop19     348M  348M     0 100% /snap/wine-platform-runtime/280
/dev/loop20      63M   63M     0 100% /snap/notion-snap/6
/dev/loop21     112M  112M     0 100% /snap/whatsapp-for-linux/30
/dev/loop22     347M  347M     0 100% /snap/wine-platform-runtime/279
/dev/loop23      44M   44M     0 100% /snap/snapd/14295
/dev/loop24      82M   82M     0 100% /snap/prospect-mail/22
/dev/sda1       511M  5.3M  506M   2% /boot/efi
tmpfs           783M   44K  783M   1% /run/user/1000

What do you suggest I do? Please, don't make me reinstall my system :(

Thanks.