Os resultados foram:

yuri@yuri-Lenovo-G40-80:~$ mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,nosuid,relatime,size=1946944k,nr_inodes=486736,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=395272k,mode=755)
/dev/sda2 on / type ext4 (rw,relatime,errors=remount-ro,stripe=32750,data=ordered)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)
cgroup on /sys/fs/cgroup/unified type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
cgroup on /sys/fs/cgroup/rdma type cgroup (rw,nosuid,nodev,noexec,relatime,rdma)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=24,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=15489)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,pagesize=2M)
mqueue on /dev/mqueue type mqueue (rw,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
configfs on /sys/kernel/config type configfs (rw,relatime)
/var/lib/snapd/snaps/core_4571.snap on /snap/core/4571 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/firefox_85.snap on /snap/firefox/85 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/firefox_71.snap on /snap/firefox/71 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/libreoffice_63.snap on /snap/libreoffice/63 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/retroarch_110.snap on /snap/retroarch/110 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/spotify_13.snap on /snap/spotify/13 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/retroarch_113.snap on /snap/retroarch/113 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/libreoffice_59.snap on /snap/libreoffice/59 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/libreoffice_64.snap on /snap/libreoffice/64 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core_4650.snap on /snap/core/4650 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/canonical-livepatch_39.snap on /snap/canonical-livepatch/39 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/onlyoffice-desktopeditors_21.snap on /snap/onlyoffice-desktopeditors/21 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/core_4486.snap on /snap/core/4486 type squashfs (ro,nodev,relatime,x-gdu.hide)
/var/lib/snapd/snaps/canonical-livepatch_41.snap on /snap/canonical-livepatch/41 type squashfs (ro,nodev,relatime,x-gdu.hide)
/dev/sda1 on /boot/efi type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime)
tmpfs on /run/user/103 type tmpfs (rw,nosuid,nodev,relatime,size=395268k,mode=700,uid=103,gid=105)
tmpfs on /run/snapd/ns type tmpfs (rw,nosuid,noexec,relatime,size=395272k,mode=755)
nsfs on /run/snapd/ns/canonical-livepatch.mnt type nsfs (rw)
tmpfs on /run/user/1000 type tmpfs (rw,nosuid,nodev,relatime,size=395268k,mode=700,uid=1000,gid=1000)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
yuri@yuri-Lenovo-G40-80:~$ sudo blkid
[sudo] senha para yuri:
/dev/sda1: UUID="A199-4E80" TYPE="vfat" PARTLABEL="EFI System Partition" PARTUUID="5904e01e-2292-4ef5-8442-6923d80fa9f6"
/dev/sda2: UUID="4a273f60-c897-4d14-ba49-3c7fe576cab8" TYPE="ext4" PARTLABEL="Ubuntu 16.04" PARTUUID="ff80d76f-7944-400d-b6ac-d1ff4215e039"
/dev/sda3: UUID="ec78cf8b-234d-4368-928f-cd10f69fbe77" TYPE="swap" PARTLABEL="Swap" PARTUUID="b1a6808c-f3cd-4dac-828c-253c68648aa4"
/dev/sda5: UUID="1ACAB4DACAB4B2FD" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="774ab22a-460c-4be8-b806-b1e60f205a6d"
/dev/sda6: UUID="CCD49AC1D49AAD68" TYPE="ntfs" PARTUUID="04ae76b4-5cc9-4b7c-a693-60434bf8315c"
/dev/loop0: TYPE="squashfs"
/dev/loop1: TYPE="squashfs"
/dev/loop2: TYPE="squashfs"
/dev/loop3: TYPE="squashfs"
/dev/loop4: TYPE="squashfs"
/dev/loop5: TYPE="squashfs"
/dev/loop6: TYPE="squashfs"
/dev/loop7: TYPE="squashfs"
/dev/sda4: PARTLABEL="Microsoft reserved partition" PARTUUID="068bae0a-edad-4386-9dfb-f4893467db2c"
/dev/loop8: TYPE="squashfs"
/dev/loop9: TYPE="squashfs"
/dev/loop10: TYPE="squashfs"
/dev/loop11: TYPE="squashfs"
/dev/loop12: TYPE="squashfs"
/dev/loop13: TYPE="squashfs"
yuri@yuri-Lenovo-G40-80:~$ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda2 during installation
UUID=4a273f60-c897-4d14-ba49-3c7fe576cab8 /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/sda1 during installation
#UUID=A199-4E80  /boot/efi       vfat    umask=0077      0       1
# swap was on /dev/sda3 during installation
UUID=a2ab5bcc-f8f1-424a-ae70-2442e834de8d none            swap    sw              0       0
UUID=A199-4E80 /boot/efi vfat defaults 0 1
yuri@yuri-Lenovo-G40-80:~$


galactus, pra ser bem sincero eu até curto a ideia dos snaps mas, ainda estão muito ruins eu prefiro usar PPA's mas tem alguns programas que simplesmente não consegui instalar por PPA somente snap.

Qual sistema de arquivos esta sendo usado?  Como ficou seu fstab?

Bem sincero? Não faço a mínima? haha Minha experiência maior é com hardware. Não entendo tanto quanto gostaria de software, mas consigo desenrolar de alguma form.

Você acha que seria mais fácil resolver esse problema formatando o pc? Apesar de eu não curti muito a ideia... Mas se for o caso, a gente faz, né?

Brigado pela atenção

Olá pessoal do fórum,
Em alguma das vezes que fiz dual boot meu lenovo 80-JE, o qual tem o sistema Ubuntu 18.04 e o Windows 10, eu não consegui inicializar nenhum dos dois e tive que, com o pendrive bootavel utilizar o reparador de inicialização e tudo voltou ao normal, salve a velocidade de inicialização, o que está me incomodando bastante.
O que acontece é que eu acredito que isso está acontecendo devido ao número de arquivos de boot está em demasia e eu não sei qual excluir.
https://imgur.com/XpEPahh (print do grub costumizer)
Essas são as opções que aparecem. Quais eu deveria apagar?