The problem started when the computer powered off.
I got that error message: Error Mounting /dev/sda2 at /media/aly/Home: Unknown error when mounting /dev/sda2
aly@aly-OptiPlex-780:/var/www/SocialSphere$ lsblk -f this comment output:
NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINTS
loop0
squash 4.0 0 100% /snap/4ktube/75
loop1
squash 4.0 0 100% /snap/4ktube/82
loop2
squash 4.0 0 100% /snap/bare/5
loop3
squash 4.0 0 100% /snap/canonical-livepatch/264
loop4
squash 4.0 0 100% /snap/canonical-livepatch/278
loop5
squash 4.0 0 100% /snap/code/156
loop6
squash 4.0 0 100% /snap/code/157
loop7
squash 4.0 0 100% /snap/core20/2182
loop8
squash 4.0 0 100% /snap/core20/2264
loop9
squash 4.0 0 100% /snap/core18/2812
loop10
squash 4.0 0 100% /snap/core22/1122
loop11
squash 4.0 0 100% /snap/firefox/4090
loop12
squash 4.0 0 100% /snap/firefox/4136
loop13
squash 4.0 0 100% /snap/gnome-42-2204/172
loop14
squash 4.0 0 100% /snap/gnome-42-2204/176
loop15
squash 4.0 0 100% /snap/gtk-common-themes/1535
loop16
squash 4.0 0 100% /snap/pyqt5-runtime-core20/9
loop17
squash 4.0 0 100% /snap/snap-store/959
loop18
squash 4.0 0 100% /snap/snapd/21184
loop19
squash 4.0 0 100% /snap/snapd-desktop-integration/157
loop20
squash 4.0 0 100% /snap/snapd/21465
loop21
squash 4.0 0 100% /snap/snapd-desktop-integration/83
loop22
squash 4.0 0 100% /snap/telegram-desktop/5791
loop23
squash 4.0 0 100% /snap/telegram-desktop/5820
loop24
squash 4.0 0 100% /snap/vlc/3777
loop25
0 100% /snap/core18/2823
sda
├─sda1
│
├─sda2
│ ntfs Home 24742E82742E56B8
├─sda3
│ ntfs System Reserved
│ 9A668A94668A70B5
├─sda4
│ ntfs 282492AC24927C8E
├─sda5
│ vfat FAT32 9D79-D2B0
├─sda6
│ vfat FAT32 E53C-E036 504.9M 1% /boot/efi
└─sda7
ext4 1.0 e27ed1a0-7e15-4cbf-b542-cb09b7dae50b 6.3G 81% /var/snap/firefox/common/host-hunspell
/
sr0
