proc_pid_mountinfo(5) File Formats Manual proc_pid_mountinfo(5) /proc/pid/mountinfo - mount information /proc/pid/mountinfo ( Linux 2.6.26) This file contains information about mounts in the process's mount namespace (see mount_namespaces(7)). It supplies various information (e.g., propagation state, root of mount for bind mounts, identifier for each mount and its parent) that is missing from the (older) /proc/pid/mounts file, and fixes various other problems with that file (e.g., nonextensibility, failure to distinguish per-mount versus per-superblock options). : 36 35 98:0 /mnt1 /mnt2 rw,noatime master:1 - ext3 /dev/root rw,errors=continue (1)(2)(3) (4) (5) (6) (7) (8) (9) (10) (11) ( ): (1) ID : ( umount(2)). (2) ID: ID ( , ). ( ) hides the existing mount) P, . , , , - ( , , P, , ). If the parent mount lies outside the process's root directory (see chroot(2)), the ID shown here won't have a corresponding record in mountinfo whose mount ID (field 1) matches this parent mount ID (because mounts that lie outside the process's root directory are not shown in mountinfo). As a special case of this point, the process's root mount may have a parent mount (for the initramfs filesystem) that lies outside the process's root directory, and an entry for that mount will not appear in mountinfo. (3) :: st_dev ( stat(2)). (4) : , . (5) : . (6) : ( mount(2)). (7) : <<[:]>>; . (8) : . (9) : <<[.]>>. (10) : , <>. (11) : ( mount(2)). : shared, master, propagate_from unbindable. mount_namespaces(7). . For more information on mount propagation see Documentation/filesystems/sharedsubtree.rst (or Documentation/filesystems/sharedsubtree.txt before Linux 5.8) in the Linux kernel source tree. proc(5) () Alexey, Azamat Hackimov , kogamatranslator49 , Darima Kogan , Max Is , Yuri Kozlov ; GNU (GNU General Public License - GPL, 3 ) , - . - , , () () () <>. Linux 6.9.1 2 2024 . proc_pid_mountinfo(5)