tang@ubt-1:~ $ ls -lh /usr/bin/sudo
-rwsr-xr-x 1 root root 146K Feb 1 01:18 /usr/bin/sudo
tang@ubt-1:~ $ cat /proc/mounts
/dev/sda / ext4 rw,nosuid,nodev,relatime,stripe=8191,data=ordered 0 0
none /dev tmpfs rw,nodev,relatime,size=492k,mode=755,uid=1000000,gid=1000000 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
sysfs /sys sysfs rw,nodev,relatime 0 0
udev /dev/fuse devtmpfs rw,nosuid,relatime,size=16395124k,nr_inodes=4098781,mode=755 0 0
udev /dev/net/tun devtmpfs rw,nosuid,relatime,size=16395124k,nr_inodes=4098781,mode=755 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0
fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0
pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,relatime 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
securityfs /sys/kernel/security securityfs rw,nosuid,nodev,noexec,relatime 0 0
sysfs /sys/kernel/tracing sysfs rw,nosuid,nodev,noexec,relatime 0 0
mqueue /dev/mqueue mqueue rw,relatime 0 0
tmpfs /dev/lxd tmpfs rw,relatime,size=100k,mode=755 0 0
tmpfs /dev/.lxd-mounts tmpfs rw,relatime,size=100k,mode=711 0 0
lxcfs /proc/cpuinfo fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
lxcfs /proc/diskstats fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
lxcfs /proc/loadavg fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
lxcfs /proc/meminfo fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
lxcfs /proc/stat fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
lxcfs /proc/swaps fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
lxcfs /proc/uptime fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
lxcfs /sys/devices/system/cpu/online fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
udev /dev/full devtmpfs rw,nosuid,relatime,size=16395124k,nr_inodes=4098781,mode=755 0 0
udev /dev/null devtmpfs rw,nosuid,relatime,size=16395124k,nr_inodes=4098781,mode=755 0 0
udev /dev/random devtmpfs rw,nosuid,relatime,size=16395124k,nr_inodes=4098781,mode=755 0 0
udev /dev/tty devtmpfs rw,nosuid,relatime,size=16395124k,nr_inodes=4098781,mode=755 0 0
udev /dev/urandom devtmpfs rw,nosuid,relatime,size=16395124k,nr_inodes=4098781,mode=755 0 0
udev /dev/zero devtmpfs rw,nosuid,relatime,size=16395124k,nr_inodes=4098781,mode=755 0 0
devpts /dev/console devpts rw,relatime,gid=5,mode=620,ptmxmode=666 0 0
none /proc/sys/kernel/random/boot_id tmpfs ro,nosuid,nodev,noexec,relatime,size=492k,mode=755,uid=1000000,gid=1000000 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=1000005,mode=620,ptmxmode=666,max=1024 0 0
devpts /dev/ptmx devpts rw,nosuid,noexec,relatime,gid=1000005,mode=620,ptmxmode=666,max=1024 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev,uid=1000000,gid=1000000 0 0
tmpfs /run tmpfs rw,nosuid,nodev,mode=755,uid=1000000,gid=1000000 0 0
tmpfs /run/lock tmpfs rw,nosuid,nodev,noexec,relatime,size=5120k,uid=1000000,gid=1000000 0 0
tmpfs /sys/fs/cgroup tmpfs ro,nosuid,nodev,noexec,mode=755,uid=1000000,gid=1000000 0 0
cgroup /sys/fs/cgroup/systemd cgroup rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd 0 0
cgroup /sys/fs/cgroup/freezer cgroup rw,nosuid,nodev,noexec,relatime,freezer 0 0
cgroup /sys/fs/cgroup/hugetlb cgroup rw,nosuid,nodev,noexec,relatime,hugetlb 0 0
cgroup /sys/fs/cgroup/cpu,cpuacct cgroup rw,nosuid,nodev,noexec,relatime,cpu,cpuacct 0 0
cgroup /sys/fs/cgroup/memory cgroup rw,nosuid,nodev,noexec,relatime,memory 0 0
cgroup /sys/fs/cgroup/cpuset cgroup rw,nosuid,nodev,noexec,relatime,cpuset,clone_children 0 0
cgroup /sys/fs/cgroup/net_cls,net_prio cgroup rw,nosuid,nodev,noexec,relatime,net_cls,net_prio 0 0
cgroup /sys/fs/cgroup/pids cgroup rw,nosuid,nodev,noexec,relatime,pids 0 0
cgroup /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0
cgroup /sys/fs/cgroup/devices cgroup rw,nosuid,nodev,noexec,relatime,devices 0 0
cgroup /sys/fs/cgroup/perf_event cgroup rw,nosuid,nodev,noexec,relatime,perf_event 0 0
/dev/sda /snap ext4 rw,nosuid,nodev,relatime,stripe=8191,data=ordered 0 0
snapfuse /snap/snapd/7264 fuse.snapfuse ro,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
snapfuse /snap/core/9066 fuse.snapfuse ro,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
snapfuse /snap/midori/550 fuse.snapfuse ro,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
tmpfs /run/user/1001 tmpfs rw,nosuid,nodev,relatime,size=3283388k,mode=700,uid=1001001,gid=1001001 0 0