/proc/self/mountinfo:

21 29 0:20 / /sys rw,nosuid,nodev,noexec,relatime shared:9 - sysfs sysfs rw
22 29 0:5 / /proc rw,nosuid,nodev,noexec,relatime shared:16 - proc proc rw
23 29 0:6 / /dev rw,nosuid,relatime shared:4 - devtmpfs udev rw,size=1525040k,nr_inodes=381260,mode=755
24 23 0:21 / /dev/pts rw,nosuid,noexec,relatime shared:5 - devpts devpts rw,gid=5,mode=620,ptmxmode=000
25 29 0:22 / /run rw,nosuid,noexec,relatime shared:7 - tmpfs tmpfs rw,size=309532k,mode=755
26 29 11:0 / /cdrom ro,noatime shared:3 - iso9660 /dev/sr0 ro,nojoliet,check=s,map=n,blocksize=2048
28 29 7:0 / /rofs ro,noatime shared:2 - squashfs /dev/loop0 ro
29 1 0:24 / / rw,relatime shared:1 - overlay /cow rw,lowerdir=//filesystem.squashfs,upperdir=/cow/upper,workdir=/cow/work
32 21 0:7 / /sys/kernel/security rw,nosuid,nodev,noexec,relatime shared:10 - securityfs securityfs rw
33 23 0:26 / /dev/shm rw,nosuid,nodev shared:6 - tmpfs tmpfs rw
34 25 0:27 / /run/lock rw,nosuid,nodev,noexec,relatime shared:8 - tmpfs tmpfs rw,size=5120k
35 21 0:28 / /sys/fs/cgroup ro,nosuid,nodev,noexec shared:11 - tmpfs tmpfs ro,mode=755
36 35 0:29 / /sys/fs/cgroup/unified rw,nosuid,nodev,noexec,relatime shared:12 - cgroup2 cgroup2 rw,nsdelegate
37 35 0:30 / /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime shared:13 - cgroup cgroup rw,xattr,name=systemd
38 21 0:31 / /sys/fs/pstore rw,nosuid,nodev,noexec,relatime shared:14 - pstore pstore rw
39 21 0:32 / /sys/fs/bpf rw,nosuid,nodev,noexec,relatime shared:15 - bpf bpf rw,mode=700
40 35 0:33 / /sys/fs/cgroup/cpu,cpuacct rw,nosuid,nodev,noexec,relatime shared:17 - cgroup cgroup rw,cpu,cpuacct
41 35 0:34 / /sys/fs/cgroup/net_cls,net_prio rw,nosuid,nodev,noexec,relatime shared:18 - cgroup cgroup rw,net_cls,net_prio
42 35 0:35 / /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime shared:19 - cgroup cgroup rw,memory
43 35 0:36 / /sys/fs/cgroup/pids rw,nosuid,nodev,noexec,relatime shared:20 - cgroup cgroup rw,pids
44 35 0:37 / /sys/fs/cgroup/cpuset rw,nosuid,nodev,noexec,relatime shared:21 - cgroup cgroup rw,cpuset
45 35 0:38 / /sys/fs/cgroup/rdma rw,nosuid,nodev,noexec,relatime shared:22 - cgroup cgroup rw,rdma
46 35 0:39 / /sys/fs/cgroup/blkio rw,nosuid,nodev,noexec,relatime shared:23 - cgroup cgroup rw,blkio
47 35 0:40 / /sys/fs/cgroup/devices rw,nosuid,nodev,noexec,relatime shared:24 - cgroup cgroup rw,devices
48 35 0:41 / /sys/fs/cgroup/hugetlb rw,nosuid,nodev,noexec,relatime shared:25 - cgroup cgroup rw,hugetlb
49 35 0:42 / /sys/fs/cgroup/perf_event rw,nosuid,nodev,noexec,relatime shared:26 - cgroup cgroup rw,perf_event
50 35 0:43 / /sys/fs/cgroup/freezer rw,nosuid,nodev,noexec,relatime shared:27 - cgroup cgroup rw,freezer
51 22 0:44 / /proc/sys/fs/binfmt_misc rw,relatime shared:28 - autofs systemd-1 rw,fd=28,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=14357
52 23 0:18 / /dev/mqueue rw,relatime shared:29 - mqueue mqueue rw
53 21 0:8 / /sys/kernel/debug rw,relatime shared:30 - debugfs debugfs rw
54 23 0:45 / /dev/hugepages rw,relatime shared:31 - hugetlbfs hugetlbfs rw,pagesize=2M
119 21 0:46 / /sys/fs/fuse/connections rw,relatime shared:63 - fusectl fusectl rw
122 21 0:19 / /sys/kernel/config rw,relatime shared:65 - configfs configfs rw
125 29 0:47 / /tmp rw,nosuid,nodev,relatime shared:67 - tmpfs tmpfs rw
755 29 7:1 / /snap/core/5328 ro,nodev,relatime shared:427 - squashfs /dev/loop1 ro
772 29 7:2 / /snap/gnome-3-26-1604/70 ro,nodev,relatime shared:436 - squashfs /dev/loop2 ro
789 29 7:3 / /snap/gnome-calculator/238 ro,nodev,relatime shared:445 - squashfs /dev/loop3 ro
806 29 7:4 / /snap/gnome-characters/124 ro,nodev,relatime shared:454 - squashfs /dev/loop4 ro
468 25 0:53 / /run/user/999 rw,nosuid,nodev,relatime shared:319 - tmpfs tmpfs rw,size=309528k,mode=700,uid=999,gid=999
597 29 7:5 / /snap/gnome-logs/43 ro,nodev,relatime shared:383 - squashfs /dev/loop5 ro
824 468 0:54 / /run/user/999/gvfs rw,nosuid,nodev,relatime shared:464 - fuse.gvfsd-fuse gvfsd-fuse rw,user_id=999,group_id=999
1131 29 7:6 / /snap/gnome-system-monitor/57 ro,nodev,relatime shared:634 - squashfs /dev/loop6 ro
842 29 7:7 / /snap/gtk-common-themes/701 ro,nodev,relatime shared:474 - squashfs /dev/loop7 ro
863 25 0:22 /snapd/ns /run/snapd/ns rw,nosuid,noexec,relatime - tmpfs tmpfs rw,size=309532k,mode=755
934 863 0:4 mnt:[4026532348] /run/snapd/ns/gnome-calculator.mnt rw - nsfs nsfs rw