How To See Characteristics of File Systems on Linux or Unix
How do I display the characteristics of file systems such as inodes, blocks, block size, file system name, state, lifetime writes, fsck status and more on Linux or Unix-like operating system?
You can use any one of the following command as per your Linux or Unix variant: => tune2fs command => lsfs command => fstyp command => df command
Linux show file system characteristics
Pass the -l option to list the contents of the filesystem superblock, including the current values of the parameters that can be set via tune2fs command. Type the following command: # tune2fs -l /path/to/device | more # tune2fs -l /dev/sda2 | grep # tune2fs -l /dev/cciss/c1d1p1 # tune2fs -l /dev/mapper/data Sample outputs:
You can use grep command to filter out information. For example, to see lifetime writes on ext4 filesystem, enter: # tune2fs -l /dev/md0 | grep 'writes' Sample outputs:
Lifetime writes: 90 GB
A note about HP-UX specific command
The fstyp command allows the user to determine the file system type of a mounted or unmounted file system. You need to pass special a device special file such as /dev/dsk/c1t6d0 and -v option to see information about the file system’s superblock. # fstyp -v /dev/vg02/lvol2 # fstyp -v /dev/dsk/c1t6d0 | more # df -g /dev/vg02/lvol2 The ‘df -g‘ command the entire structure of the file system.
A note about Solaris Unix to see the file system characteristics
Type the following command: # fstyp -v /dev/md/dsk/d200 # fstyp -v /dev/md/dsk/d200 | more # df -g /dev/md/dsk/d200
A note about AIX unix specific command
The lsfs command displays characteristics of file systems, such as mount points, automatic mounts, permissions, and file system size. The FileSystem parameter reports on a specific file system: # lsfs -q /dev/hd10admin # lsfs -q / | more
The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.