kubuntu@kubuntu:~$ sudo lsblk -fm
NAME   FSTYPE   LABEL                     UUID                                 MOUNTPOINT   SIZE OWNER GROUP MODE
loop0  squashfs                                                                /rofs        1.7G root  disk  brw-rw----
sda                                                                                       111.8G root  disk  brw-rw----
├─sda1 vfat                               0A15-15CA                                         512M root  disk  brw-rw----
├─sda2 ext4                               b95e55ef-fbbb-4836-a069-a1403f25676c               28G root  disk  brw-rw----
├─sda3 swap                               1d2b0476-65da-4683-83a2-74526b5837f7 [SWAP]       976M root  disk  brw-rw----
├─sda4 ext4                               b11b970f-3e1b-4e2c-bfbe-814c6266e1f3               28G root  disk  brw-rw----
└─sda5 ext4                               a01b80cd-0cd4-4db9-ac16-ce98fb6c0db0             54.4G root  disk  brw-rw----
sdb    iso9660  Kubuntu 18.04.1 LTS amd64 2018-08-09-06-18-27-00               /cdrom       3.8G root  disk  brw-rw----
├─sdb1 iso9660  Kubuntu 18.04.1 LTS amd64 2018-08-09-06-18-27-00                            1.8G root  disk  brw-rw----
└─sdb2 vfat     Kubuntu 18.04.1 LTS amd64 0D5F-1DB6                                         2.3M root  disk  brw-rw----
sr0                                                                                        1024M root  cdrom brw-rw----
kubuntu@kubuntu:~$ uname -a
Linux kubuntu 4.15.0-31-generic #33-Ubuntu SMP Thu Aug 2 14:34:07 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
kubuntu@kubuntu:~$ sudo e2fsck -f /dev/sda4
e2fsck 1.44.1 (24-Mar-2018)
Pass 1: Checking inodes, blocks, and sizes
Inode 3588 extent block passes checks, but checksum does not match extent
        (logical block 36864, physical block 760288, len 1241)
Fix<y>? yes
Inode 69150 extent block passes checks, but checksum does not match extent
        (logical block 12288, physical block 1026593, len 31)
Fix<y>? yes
Pass 2: Checking directory structure                                                            
Pass 3: Checking directory connectivity                                                                    
Pass 4: Checking reference counts                                                                                   
Pass 5: Checking group summary information                                                                                      
/dev/sda4: 234667/1835008 files (0.1% non-contiguous), 2257991/7336151 blocks                                                         
kubuntu@kubuntu:~$