How to inspect mount options

Inspect mount options for specific mountpoint or device.

Inspect current options for /tmp mountpoint.

$ awk '$2=="/tmp" {print "Device: " $1 "\nMountpoint: " $2 "\nFilesystem: " $3 "\nMount options: " $4 "\n"}' /proc/mounts

Device: tmpfs
Mountpoint: /tmp
Filesystem: tmpfs
Mount options: rw,nosuid,nodev,size=496024k,nr_inodes=409600

Inspect current options for /dev/sda1 device.

$ awk '$1=="/dev/sda1" {print "Device: " $1 "\nMountpoint: " $2 "\nFilesystem: " $3 "\nMount options: " $4 "\n"}' /proc/mounts

Device: /dev/sda1
Mountpoint: /
Filesystem: ext4
Mount options: rw,relatime,discard,errors=remount-ro

Inspect mountpoints with defined mode option.

$ awk '$4~/mode=/ {print "Device: " $1 "\nMountpoint: " $2 "\nFilesystem: " $3 "\nMount options: " $4 "\n"}' /proc/mounts

Device: udev
Mountpoint: /dev
Filesystem: devtmpfs
Mount options: rw,nosuid,relatime,size=479412k,nr_inodes=119853,mode=755

Device: devpts
Mountpoint: /dev/pts
Filesystem: devpts
Mount options: rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000

Device: tmpfs
Mountpoint: /run
Filesystem: tmpfs
Mount options: rw,nosuid,nodev,noexec,relatime,size=99208k,mode=755

Device: none
Mountpoint: /sys/fs/bpf
Filesystem: bpf
Mount options: rw,nosuid,nodev,noexec,relatime,mode=700

Device: tmpfs
Mountpoint: /run/user/1000
Filesystem: tmpfs
Mount options: rw,nosuid,nodev,relatime,size=99204k,nr_inodes=24801,mode=700,uid=1000,gid=1000

Display every mountpoint with its options.

$ cat /proc/mounts | awk '{print $2}' | xargs -I {} awk '$2=="{}" {print "Device: " $1 "\nMountpoint: " $2 "\nFilesystem: " $3 "\nMount options: " $4 "\n"}' /proc/mounts

Device: sysfs
Mountpoint: /sys
Filesystem: sysfs
Mount options: rw,nosuid,nodev,noexec,relatime
                                                       
Device: proc              
Mountpoint: /proc                                      
Filesystem: proc                                       
Mount options: rw,nosuid,nodev,noexec,relatime
                           
Device: udev           
Mountpoint: /dev
Filesystem: devtmpfs
Mount options: rw,nosuid,relatime,size=479412k,nr_inodes=119853,mode=755

Device: devpts
Mountpoint: /dev/pts
Filesystem: devpts
Mount options: rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000

Device: tmpfs
Mountpoint: /run
Filesystem: tmpfs
Mount options: rw,nosuid,nodev,noexec,relatime,size=99208k,mode=755

Device: /dev/sda1
Mountpoint: /
Filesystem: ext4
Mount options: rw,relatime,discard,errors=remount-ro

Device: securityfs
Mountpoint: /sys/kernel/security
Filesystem: securityfs
Mount options: rw,nosuid,nodev,noexec,relatime

Device: tmpfs
Mountpoint: /dev/shm
Filesystem: tmpfs
Mount options: rw,nosuid,nodev

Device: tmpfs
Mountpoint: /run/lock
Filesystem: tmpfs
Mount options: rw,nosuid,nodev,noexec,relatime,size=5120k

Device: cgroup2
Mountpoint: /sys/fs/cgroup
Filesystem: cgroup2
Mount options: rw,nosuid,nodev,noexec,relatime,nsdelegate,memory_recursiveprot

Device: pstore
Mountpoint: /sys/fs/pstore
Filesystem: pstore
Mount options: rw,nosuid,nodev,noexec,relatime

Device: none
Mountpoint: /sys/fs/bpf
Filesystem: bpf
Mount options: rw,nosuid,nodev,noexec,relatime,mode=700 

Device: systemd-1
Mountpoint: /proc/sys/fs/binfmt_misc
Filesystem: autofs
Mount options: rw,relatime,fd=30,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=11145

Device: mqueue
Mountpoint: /dev/mqueue
Filesystem: mqueue
Mount options: rw,nosuid,nodev,noexec,relatime

Device: hugetlbfs
Mountpoint: /dev/hugepages
Filesystem: hugetlbfs
Mount options: rw,relatime,pagesize=2M

Device: debugfs
Mountpoint: /sys/kernel/debug
Filesystem: debugfs
Mount options: rw,nosuid,nodev,noexec,relatime

Device: tracefs
Mountpoint: /sys/kernel/tracing
Filesystem: tracefs
Mount options: rw,nosuid,nodev,noexec,relatime

Device: tmpfs
Mountpoint: /tmp
Filesystem: tmpfs
Mount options: rw,nosuid,nodev,size=496024k,nr_inodes=409600

Device: fusectl
Mountpoint: /sys/fs/fuse/connections
Filesystem: fusectl
Mount options: rw,nosuid,nodev,noexec,relatime

Device: configfs
Mountpoint: /sys/kernel/config
Filesystem: configfs
Mount options: rw,nosuid,nodev,noexec,relatime

Device: tmpfs
Mountpoint: /run/user/1000
Filesystem: tmpfs
Mount options: rw,nosuid,nodev,relatime,size=99204k,nr_inodes=24801,mode=700,uid=1000,gid=1000