Linux Commands

    How to Find File Creation Time (crtime) in Linux

    RahulBy Updated:7 Comments2 Mins Read

    File creation time is stored in inode in EXT4 file system. An earlier version of EXT files systems doesn’t support file creation time.

    There is a crtime (create time) timestamp in the debugfs stat output. finally EXT4 supports create time just like btime in NTFS windows.

    Follow below instructions to how to find file creation time. Select an existing file or create a new file for testing. For this example, I am using an existing file.

    Step 1 – Find Inode Number of File

    First of all, find the inode number of any file using the following command on terminal.

    $ ls -i /var/log/secure

13377 /var/log/syslog

    Step 2 – Find File Creation Time (crtime)

    After getting the inode number of file, Use debugfs command with inode number stats following by disk path.

    $ debugfs -R 'stat <inode_number>' /dev/sda1
    Implementation:
    $ debugfs -R 'stat <13377>' /dev/sda1

debugfs 1.41.12 (17-May-2010)
Inode: 13377   Type: regular    Mode:  0600   Flags: 0x80000
Generation: 2326794244    Version: 0x00000000:00000001
User:     0   Group:     0   Size: 223317
File ACL: 0    Directory ACL: 0
Links: 1   Blockcount: 440
Fragment:  Address: 0    Number: 0    Size: 0
 ctime: 0x5230b7ae:55efa068 -- Thu Sep 12 00:04:22 2013
 atime: 0x5230b7ae:55efa068 -- Thu Sep 12 00:04:22 2013
 mtime: 0x5230b7ae:55efa068 -- Thu Sep 12 00:04:22 2013
crtime: 0x4eeacc8a:0948eb58 -- Fri Dec 16 10:13:54 2011
Size of extra inode fields: 28
Extended attributes stored in inode body:
  selinux = "system_u:object_r:var_log_t:s000" (31)
EXTENTS:
(0-24): 35008-35032, (25-54): 164224-164253

    Find the entry of crtime in above output. This is the actual file creation time.

    References:
    Read more about ext4 file system: https://ext4.wiki.kernel.org/index.php/Ext4_Disk_Layout

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    I, Rahul Kumar am the founder and chief editor of TecAdmin.net. I am a Red Hat Certified Engineer (RHCE) and working as an IT professional since 2009..

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    7 Comments

    2. shell on

      Hi ,

      I wanted to to copies files from one location to another which is created on time 00:05 .

      File names := a****.txt (after a ther is incremental number but i need to choose file with time)
      Could you please suggest as soon as …..

      Reply
    3. Akash on

      sudo debugfs -R ‘stat ‘ /dev/sddb1

      I am using google cloude shell and above command returns same results as “debugfs 1.43.4 (31-Jan-2017)” for all file inode number

      Reply
    5. Benjamin Abbott-Scott on

      You can also simply specify filename (at least on CentOS and AmazonOS) instead of inode:

      $ sudo debugfs -R ‘stat /bin/ls’ /dev/xvda1
      …
      crtime: 0x57699f20:712d39fc — Tue Jun 21 13:10:08 2016
      …

      Reply
    7. kn on

      On my system, which is Ubuntu 16.04.2, the ctime, mtime, and crtime come-up the same when I run your debugfs command. The atime field is also incorrect.

      However, did find a script that is supposed to output the correct crtime. Here’s the link:

      https://unix.stackexchange.com/a/92748

      Will check-it and post back the results.

      Reply

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