Rev. 1 - Добавлены точки монтирования для справки и дополнительная информация blk/snap. Rev. 2 - Добавлены файлы журнала в блоке кода и на скриншоте, так как они не совпадают.

Я считаю, что на моем локальном SSD или живом USB-диске есть скрытый или замаскированный раздел, который я использовал для загрузки своего ноутбука в данном конкретном случае, и что этот раздел содержит вредоносное ПО, которое я не смог удалить. После выполнения команды udisksctl на моем живом USB, я получаю вывод, показанный ниже. USB (карта microSD в картридере PNY) была физически защищена от записи до того, как была вставлена в зараженный ПК, поэтому я знаю, что USB чистый и не заражен. Может кто-нибудь помочь мне понять вывод и объяснить, как я могу удалить объект с моего компьютера?

Замечания:

Я включил вывод из fdisk -l во второй блок кода для дополнительной информации. У меня только один SSD в ноутбуке и только один USB-кардридер, содержащий мою карту microSD (live USB). Карта microSD использовалась для загрузки ПК с использованием Ubuntu 18.10.

  root@ubuntu:/home/ubuntu# udisksctl info -p /dev/sdb1

    (udisksctl info:8905): GLib-GIO-CRITICAL **: 06:27:40.321: g_dbus_object_manager_get_object: assertion 'g_variant_is_object_path (object_path)' failed
    Error looking up object with path /dev/sdb1
    root@ubuntu:/home/ubuntu# udisksctl info -b /dev/sdb1
    /org/freedesktop/UDisks2/block_devices/sdb1:
      org.freedesktop.UDisks2.Block:
        Configuration:              [('fstab', {'fsname': , 'dir': , 'type': , 'opts': , 'freq': , 'passno': })]
        CryptoBackingDevice:        '/'
        Device:                     /dev/sdb1
        DeviceNumber:               2065
        Drive:                      '/org/freedesktop/UDisks2/drives/Multiple_Card__Reader_058F63666438'
        HintAuto:                   true
        HintIconName:               
        HintIgnore:                 false
        HintName:                   
        HintPartitionable:          true
        HintSymbolicIconName:       
        HintSystem:                 false
        Id:                         by-uuid-18E7-1F79
        IdLabel:                    MULTIBOOT
        IdType:                     vfat
        IdUUID:                     18E7-1F79
        IdUsage:                    filesystem
        IdVersion:                  FAT32
        MDRaid:                     '/'
        MDRaidMember:               '/'
        PreferredDevice:            /dev/sdb1
        ReadOnly:                   true
        Size:                       15661531136
        Symlinks:                   /dev/disk/by-id/usb-Multiple_Card_Reader_058F63666438-0:0-part1
                                    /dev/disk/by-label/MULTIBOOT
                                    /dev/disk/by-partuuid/f7cd59a9-01
                                    /dev/disk/by-path/pci-0000:00:14.0-usb-0:1.4:1.0-scsi-0:0:0:0-part1
                                    /dev/disk/by-uuid/18E7-1F79
        UserspaceMountOptions:      
      org.freedesktop.UDisks2.Filesystem:
        MountPoints:        
        Size:               0
      org.freedesktop.UDisks2.Partition:
        Flags:              128
        IsContained:        false
        IsContainer:        false
        Name:               
        Number:             1
        Offset:             4194304
        Size:               15661531136
        Table:              '/org/freedesktop/UDisks2/block_devices/sdb'
        Type:               0x0c
        UUID:               f7cd59a9-01  
  root@ubuntu:/home/ubuntu# fdisk -l
Disk /dev/loop0: 1.9 GiB, 1999503360 bytes, 3905280 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x133f436e

Device       Boot   Start     End Sectors  Size Id Type
/dev/loop0p1 *          0 3905279 3905280  1.9G  0 Empty
/dev/loop0p2      3828884 3833811    4928  2.4M ef EFI (FAT-12/16/32)


Disk /dev/loop1: 1.8 GiB, 1905549312 bytes, 3721776 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop2: 87.9 MiB, 92123136 bytes, 179928 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop3: 140.9 MiB, 147722240 bytes, 288520 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop4: 2.3 MiB, 2355200 bytes, 4600 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop5: 13 MiB, 13619200 bytes, 26600 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop6: 14.5 MiB, 15208448 bytes, 29704 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop7: 3.7 MiB, 3878912 bytes, 7576 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes




Disk /dev/sdb: 14.6 GiB, 15665725440 bytes, 30597120 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xf7cd59a9

Device     Boot Start      End  Sectors  Size Id Type
/dev/sdb1  *     8192 30597119 30588928 14.6G  c W95 FAT32 (LBA)


Disk /dev/loop8: 42.1 MiB, 44183552 bytes, 86296 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
root@ubuntu:/home/ubuntu#  
  ubuntu@ubuntu:~$ findmnt
TARGET                                SOURCE     FSTYPE  OPTIONS
/                                     /cow       overlay rw,relatime,lowerdir=//
├─/sys                                sysfs      sysfs   rw,nosuid,nodev,noexec,
│ ├─/sys/kernel/security              securityfs securit rw,nosuid,nodev,noexec,
│ ├─/sys/fs/cgroup                    tmpfs      tmpfs   ro,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/unified          cgroup2    cgroup2 rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/systemd          cgroup     cgroup  rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/freezer          cgroup     cgroup  rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/perf_event       cgroup     cgroup  rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/hugetlb          cgroup     cgroup  rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/memory           cgroup     cgroup  rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/cpu,cpuacct      cgroup     cgroup  rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/devices          cgroup     cgroup  rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/cpuset           cgroup     cgroup  rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/rdma             cgroup     cgroup  rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/net_cls,net_prio cgroup     cgroup  rw,nosuid,nodev,noexec,
│ │ ├─/sys/fs/cgroup/blkio            cgroup     cgroup  rw,nosuid,nodev,noexec,
│ │ └─/sys/fs/cgroup/pids             cgroup     cgroup  rw,nosuid,nodev,noexec,
│ ├─/sys/fs/pstore                    pstore     pstore  rw,nosuid,nodev,noexec,
│ ├─/sys/firmware/efi/efivars         efivarfs   efivarf rw,nosuid,nodev,noexec,
│ ├─/sys/fs/bpf                       bpf        bpf     rw,nosuid,nodev,noexec,
│ ├─/sys/kernel/debug                 debugfs    debugfs rw,relatime
│ ├─/sys/fs/fuse/connections          fusectl    fusectl rw,relatime
│ └─/sys/kernel/config                configfs   configf rw,relatime
├─/proc                               proc       proc    rw,nosuid,nodev,noexec,
│ └─/proc/sys/fs/binfmt_misc          systemd-1  autofs  rw,relatime,fd=30,pgrp=
├─/dev                                udev       devtmpf rw,nosuid,relatime,size
│ ├─/dev/pts                          devpts     devpts  rw,nosuid,noexec,relati
│ ├─/dev/shm                          tmpfs      tmpfs   rw,nosuid,nodev
│ ├─/dev/mqueue                       mqueue     mqueue  rw,relatime
│ └─/dev/hugepages                    hugetlbfs  hugetlb rw,relatime,pagesize=2M
├─/run                                tmpfs      tmpfs   rw,nosuid,noexec,relati
│ ├─/run/lock                         tmpfs      tmpfs   rw,nosuid,nodev,noexec,
│ └─/run/user/999                     tmpfs      tmpfs   rw,nosuid,nodev,relatim
│   └─/run/user/999/gvfs              gvfsd-fuse fuse.gv rw,nosuid,nodev,relatim
├─/isodevice                          /dev/sdb1  vfat    ro,relatime,fmask=0022,
├─/cdrom                              /dev/loop0 iso9660 ro,noatime,nojoliet,che
├─/rofs                               /dev/loop1 squashf ro,noatime
├─/tmp                                tmpfs      tmpfs   rw,nosuid,nodev,relatim
├─/snap/core/5662                     /dev/loop2 squashf ro,nodev,relatime
├─/snap/gnome-3-26-1604/70            /dev/loop3 squashf ro,nodev,relatime
├─/snap/gnome-calculator/238          /dev/loop4 squashf ro,nodev,relatime
├─/snap/gnome-characters/124          /dev/loop5 squashf ro,nodev,relatime
├─/snap/gnome-logs/45                 /dev/loop6 squashf ro,nodev,relatime
├─/snap/gnome-system-monitor/57       /dev/loop7 squashf ro,nodev,relatime
└─/snap/gtk-common-themes/701         /dev/loop8 squashf ro,nodev,relatime

 ubuntu@ubuntu:~$ sudo snap list
Name                  Version    Rev   Tracking  Publisher   Notes
core                  16-2.35.4  5662  stable    canonical✓  core
gnome-3-26-1604       3.26.0     70    stable/…  canonical✓  -
gnome-calculator      3.30.0     238   stable/…  canonical✓  -
gnome-characters      3.29.91    124   stable/…  canonical✓  -
gnome-logs            3.30.0     45    stable/…  canonical✓  -
gnome-system-monitor  3.30.0     57    stable/…  canonical✓  -
gtk-common-themes     0.1        701   stable/…  canonical✓  -
ubuntu@ubuntu:~$ sudo losetup
NAME SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE                         DIO LOG-SEC
/dev/loop1
             0      0         0  1 /cdrom/casper/filesystem.squashfs   0     512
/dev/loop8
             0      0         1  1 /var/lib/snapd/snaps/gtk-common-themes_701.snap
                                                                       0     512
/dev/loop6
             0      0         1  1 /var/lib/snapd/snaps/gnome-logs_45.snap
                                                                       0     512
/dev/loop4
             0      0         1  1 /var/lib/snapd/snaps/gnome-calculator_238.snap
                                                                       0     512
/dev/loop2
             0      0         1  1 /var/lib/snapd/snaps/core_5662.snap
                                                                       0     512
/dev/loop0
             0      0         0  1 /isodevice/multiboot/ubuntu-18.10-desktop-amd64/ubuntu-18.10-desktop-amd64.iso
                                                                       0     512
/dev/loop7
             0      0         1  1 /var/lib/snapd/snaps/gnome-system-monitor_57.snap
                                                                       0     512
/dev/loop5
             0      0         1  1 /var/lib/snapd/snaps/gnome-characters_124.snap
                                                                       0     512
/dev/loop3
             0      0         1  1 /var/lib/snapd/snaps/gnome-3-26-1604_70.snap
                                                                       0     512
ubuntu@ubuntu:~$ sudo lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
loop0    7:0    0   1.9G  1 loop /cdrom
loop1    7:1    0   1.8G  1 loop /rofs
loop2    7:2    0  87.9M  1 loop /snap/core/5662
loop3    7:3    0 140.9M  1 loop /snap/gnome-3-26-1604/70
loop4    7:4    0   2.3M  1 loop /snap/gnome-calculator/238
loop5    7:5    0    13M  1 loop /snap/gnome-characters/124
loop6    7:6    0  14.5M  1 loop /snap/gnome-logs/45
loop7    7:7    0   3.7M  1 loop /snap/gnome-system-monitor/57
loop8    7:8    0  42.1M  1 loop /snap/gtk-common-themes/701
sda      8:0    0 465.8G  0 disk 
sdb      8:16   1  14.6G  1 disk 
└─sdb1   8:17   1  14.6G  1 part /isodevice
sr0     11:0    1  1024M  0 rom  

 09:24:26 gnome-logs: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
09:24:26 gnome-logs: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
09:24:26 gnome-logs: g_file_info_get_attribute_boolean: assertion 'G_IS_FILE_INFO (info)' failed
09:24:01 gnome-shell: main.go:192: cannot change mount namespace of snap "gnome-logs" according to change mount (/snap/gtk-common-themes/701/share/icons/Suru /snap/gnome-logs/45/data-dir/icons/Suru none bind,ro 0 0): cannot use "/snap/gtk-common-themes/701/share/icons/Suru" as bind-mount source: not a directory
09:23:24 systemd: Started Cleanup of Temporary Directories.
09:23:24 systemd-tmpfile: [/usr/lib/tmpfiles.d/spice-vdagentd.conf:2] Line references path below legacy directory /var/run/, updating /var/run/spice-vdagentd → /run/spice-vdagentd; please update the tmpfiles.d/ drop-in file accordingly.
09:23:24 systemd: Starting Cleanup of Temporary Directories...
09:20:13 sudo: pam_unix(sudo:session): session closed for user root
09:17:02 cron: pam_unix(cron:session): session closed for user root
09:14:01 gnome-shell: (/usr/lib/firefox/firefox:4819): dconf-WARNING **: 09:14:01.070: Unable to open /var/lib/snapd/desktop/dconf/profile/user: Permission denied
09:10:45 systemd-timesyn: Synchronized to time server 91.189.94.4:123 (ntp.ubuntu.com).
09:10:27 whoopsie: [09:10:27] online
09:10:26 nm-dispatcher: req:2 'dhcp6-change' [eno1]: start running ordered scripts...
09:10:26 avahi-daemon: Registering new address record for fd23:ebf1:2476::8e8 on eno1.*.
09:10:26 NetworkManager:   [1546247426.2969] dhcp6 (eno1): state changed unknown -> bound, event ID="82:3b:21:9b|1546247426"
09:10:26 dhclient: RCV: Reply message on eno1 from fe80::e695:6eff:fe43:ef1b.
09:10:25 avahi-daemon: Registering new address record for fd23:ebf1:2476:0:f9f2:9185:8ede:f286 on eno1.*.
09:10:24 dhclient: message status code NotOnLink.
09:10:23 avahi-daemon: Withdrawing address record for fe80::27c:1685:20f4:5560 on eno1.
09:10:23 NetworkManager:   [1546247423.9360] dhcp6 (eno1): dhclient started with pid 4611
09:10:22 systemd-resolve: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP.
09:10:22 nm-dispatcher: req:1 'up' [eno1]: start running ordered scripts...
09:10:22 systemd: Started Network Manager Script Dispatcher Service.
09:10:22 dbus-daemon: [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
09:10:22 gsd-sharing: Failed to StopUnit service: GDBus.Error:org.freedesktop.systemd1.NoSuchUnit: Unit gnome-remote-desktop.service not loaded.
09:10:22 systemd: Starting Network Manager Script Dispatcher Service...
09:10:22 dbus-daemon: [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.18' (uid=0 pid=1193 comm="/usr/sbin/NetworkManager --no-daemon " label="unconfined")
09:10:22 dhclient: bound to 192.168.8.145 -- renewal in 17038 seconds.
09:10:22 NetworkManager:   [1546247422.1574] device (eno1): Activation: successful, device activated.
09:10:22 avahi-daemon: Registering new address record for 192.168.8.145 on eno1.IPv4.
09:10:22 NetworkManager:   [1546247422.1514] dhcp4 (eno1): state changed unknown -> bound
09:10:22 dhclient: DHCPACK of 192.168.8.145 from 192.168.8.1
09:10:22 avahi-daemon: Registering new address record for fe80::27c:1685:20f4:5560 on eno1.*.
09:10:22 NetworkManager:   [1546247422.1169] dhcp4 (eno1): dhclient started with pid 4522
09:10:22 kernel: r8169 0000:02:00.0 eno1: link up
09:10:22 NetworkManager:   [1546247422.1006] device (eno1): carrier: link connected
09:09:41 su: pam_unix(su:session): session closed for user root
09:09:03 systemd: Startup finished in 4.950s (firmware) + 14.452s (loader) + 21.870s (kernel) + 51.332s (userspace) = 1min 32.606s.
09:09:02 apparmor_parser: AVC apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.gnome-calculator.gnome-calculator" pid=4373 comm="apparmor_parser"
09:09:01 kernel: audit: type=1400 audit(1546247341.308:225): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.gnome-calculator.gnome-calculator" pid=4341 comm="apparmor_parser"
09:09:01 apparmor_parser: AVC apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.gnome-calculator.gnome-calculator" pid=4341 comm="apparmor_parser"
09:09:01 kernel: audit: type=1400 audit(1546247341.068:224): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap-update-ns.gnome-calculator" pid=4339 comm="apparmor_parser"
09:09:01 apparmor_parser: AVC apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap-update-ns.gnome-calculator" pid=4339 comm="apparmor_parser"
09:09:00 kernel: audit: type=1400 audit(1546247340.892:223): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.gnome-logs.gnome-logs" pid=4332 comm="apparmor_parser"
09:09:00 apparmor_parser: AVC apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.gnome-logs.gnome-logs" pid=4332 comm="apparmor_parser"
09:09:00 kernel: audit: type=1400 audit(1546247340.664:222): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap-update-ns.gnome-logs" pid=4330 comm="apparmor_parser"
09:09:00 apparmor_parser: AVC apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap-update-ns.gnome-logs" pid=4330 comm="apparmor_parser"
09:09:00 kernel: audit: type=1400 audit(1546247340.420:221): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.gnome-logs.gnome-logs" pid=4322 comm="apparmor_parser"
09:09:00 apparmor_parser: AVC apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.gnome-logs.gnome-logs" pid=4322 comm="apparmor_parser"
09:09:00 kernel: audit: type=1400 audit(1546247340.196:220): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap-update-ns.gnome-logs" pid=4320 comm="apparmor_parser"
09:09:00 apparmor_parser: AVC apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap-update-ns.gnome-logs" pid=4320 comm="apparmor_parser"
09:09:00 kernel: audit: type=1400 audit(1546247340.028:219): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.gnome-characters.gnome-characters" pid=4312 comm="apparmor_parser"
09:09:00 apparmor_parser: AVC apparmor="STATUS" operation="profile_replace" profile="unconfined" name="snap.gnome-characters.gnome-characters" pid=4312 comm="apparmor_parser"

Скриншот журналов

Скриншот журналов

|источник

1 ответ1

0

Я бы сказал, что нет никаких дополнительных разделов.

Петлевые устройства представляют собой следы пакетов с привязкой, присутствующих на "Живом USB"

Сравните с недавно загруженным 18.04 - "live USB" [на 4GB USB Flash-mem]
(Я удалил sda, sdb и sdc - мои настоящие жесткие диски):

ubuntu@ubuntu:~$ snap list
Name                  Version    Rev   Tracking  Publisher  Notes
core                  16-2.33.1  4917  stable    canonical  core
gnome-3-26-1604       3.26.0     70    stable/…  canonical  -
gnome-calculator      3.28.2     180   stable/…  canonical  -
gnome-characters      3.28.2     103   stable/…  canonical  -
gnome-logs            3.28.2     37    stable/…  canonical  -
gnome-system-monitor  3.28.2     51    stable/…  canonical  -
gtk-common-themes     0.1        319   stable/…  canonical  -


ubuntu@ubuntu:~$ losetup
NAME       SIZELIMIT OFFSET AUTOCLEAR RO BACK-FILE                                         DIO LOG-SEC
/dev/loop1         0      0         1  1 /var/lib/snapd/snaps/core_4917.snap                 0     512
/dev/loop6         0      0         1  1 /var/lib/snapd/snaps/gnome-logs_37.snap             0     512
/dev/loop4         0      0         1  1 /var/lib/snapd/snaps/gnome-calculator_180.snap      0     512
/dev/loop2         0      0         1  1 /var/lib/snapd/snaps/gtk-common-themes_319.snap     0     512
/dev/loop0         0      0         0  1 /cdrom/casper/filesystem.squashfs                   0     512
/dev/loop7         0      0         1  1 /var/lib/snapd/snaps/gnome-system-monitor_51.snap   0     512
/dev/loop5         0      0         1  1 /var/lib/snapd/snaps/gnome-characters_103.snap      0     512
/dev/loop3         0      0         1  1 /var/lib/snapd/snaps/gnome-3-26-1604_70.snap        0     512


ubuntu@ubuntu:~$ lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
loop0    7:0    0   1.8G  1 loop /rofs
loop1    7:1    0  86.9M  1 loop /snap/core/4917
loop2    7:2    0  34.7M  1 loop /snap/gtk-common-themes/319
loop3    7:3    0 140.9M  1 loop /snap/gnome-3-26-1604/70
loop4    7:4    0   2.3M  1 loop /snap/gnome-calculator/180
loop5    7:5    0    13M  1 loop /snap/gnome-characters/103
loop6    7:6    0  14.5M  1 loop /snap/gnome-logs/37
loop7    7:7    0   3.7M  1 loop /snap/gnome-system-monitor/51

---8<---

sdh      8:112  1   3.8G  0 disk /cdrom
├─sdh1   8:113  1   1.8G  0 part 
└─sdh2   8:114  1   2.3M  0 part 
sr0     11:0    1  1024M  0 rom  


ubuntu@ubuntu:~$ sudo fdisk -l
Disk /dev/loop0: 1.8 GiB, 1864450048 bytes, 3641504 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop1: 86.9 MiB, 91099136 bytes, 177928 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop2: 34.7 MiB, 36323328 bytes, 70944 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop3: 140.9 MiB, 147722240 bytes, 288520 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop4: 2.3 MiB, 2433024 bytes, 4752 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop5: 13 MiB, 13619200 bytes, 26600 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop6: 14.5 MiB, 15196160 bytes, 29680 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/loop7: 3.7 MiB, 3887104 bytes, 7592 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes




Disk /dev/sda: ...

Disk /dev/sdb: ...

Disk /dev/sdc: ...

Disk /dev/sdh: 3.8 GiB, 4040748544 bytes, 7892087 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x663eb4c4

Device     Boot   Start     End Sectors  Size Id Type
/dev/sdh1  *          0 3815135 3815136  1.8G  0 Empty
/dev/sdh2       3737268 3741939    4672  2.3M ef EFI (FAT-12/16/32)


ubuntu@ubuntu:~$

Анализ имеющихся данных в вопросе

Вывод fdisk -l

2 Гб Install-media-disk, подготовленный для загрузки, сравните с /dev /sdh выше. loop0p1 и ... p2 здесь два раздела. Это первый уровень контента в ubuntu-18.10-desktop-amd64.iso

Disk /dev/loop0: 1.9 GiB, 1999503360 bytes, 3905280 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x133f436e

Device       Boot   Start     End Sectors  Size Id Type
/dev/loop0p1 *          0 3905279 3905280  1.9G  0 Empty
/dev/loop0p2      3828884 3833811    4928  2.4M ef EFI (FAT-12/16/32)

Коллекция петлевых устройств, смонтированных оснасткой пакетов, кроме # 6:

Disk /dev/loop1: 1.8 GiB, 1905549312 bytes, 3721776 sectors
Disk /dev/loop2: 87.9 MiB, 92123136 bytes, 179928 sectors
Disk /dev/loop3: 140.9 MiB, 147722240 bytes, 288520 sectors
Disk /dev/loop4: 2.3 MiB, 2355200 bytes, 4600 sectors
Disk /dev/loop5: 13 MiB, 13619200 bytes, 26600 sectors
Disk /dev/loop6: 14.5 MiB, 15208448 bytes, 29704 sectors
Disk /dev/loop7: 3.7 MiB, 3878912 bytes, 7576 sectors
Disk /dev/loop8: 42.1 MiB, 44183552 bytes, 86296 sectors
Проверьте вывод lsblk в вашем Вопросе для деталей. Первый - это «CD-ROM», смонтированный как / rofs (Файловая система только для чтения). Остальные - это пакеты оснастки, включенные в него. loop6 - либо часть пакетов Snap, и / или место для файлов журналов во время процесса установки Ubuntu, аналогично резидентному RAM-диску.

SSD:

Disk /dev/sda: 465.8 GiB, 500107862016 bytes, 976773168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
... один раздел

Теперь sdb/sdb1 должен быть основным разделом USB-памяти. Тот, который вы загружаете, возможно, 16 ГБ? Он загрузочный, так как "Boot" имеет «*» под ним.

Disk /dev/sdb: 14.6 GiB, 15665725440 bytes, 30597120 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xf7cd59a9

Device     Boot Start      End  Sectors  Size Id Type
/dev/sdb1  *     8192 30597119 30588928 14.6G  c W95 FAT32 (LBA)
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