It shows us the last time the file status was changed due to modifications such as changing the file permissions. While the ctime field sounds similar to crtime, it does not tell us the file creation date. We can see that we created the file on “Fri Dec 17 06:17:09 2021”. In Linux, sometimes we use the short form mtime to indicate the last modification/change time of a file. Here, the creation time is in the crtime field mentioned earlier. Getting the Last Modification Time of a Directory. The syntax is debugfs -R ‘stat ’ /dev/sdX where inode is our file inode, and /dev/sdX is the filesystem of the file: $ sudo debugfs -R 'stat ' /dev/sda2 Now, we can pass this information to the debugfs command. For this, we can use the –format flag with %w as its value:įilesystem 1K-blocks Used Available Use% Mounted on We can also instruct stat only to give us the required data, which is the file creation date in our case. Size: 15 Blocks: 8 IO Block: 4096 regular file Now, let’s modify the file and check that only the “Modify” field changes, as it indicates the last modification time: $ echo "Modified" > file Size: 6 Blocks: 8 IO Block: 4096 regular fileĪccess: (0644/-rw-r-r-) Uid: ( 1000/baeldung) Gid: ( 1000/baeldung)Īs we can see, the creation date is shown in the “Birth” field. You can also use the timedatectl command to change the date and time. The output will show the new date and time that has been set. Replace YYYY-MM-DD HH:MM:SS with the actual date and time you want to set. Let’s create a file and check its creation time: $ date echo "Hello" > file Type sudo date -s YYYY-MM-DD HH:MM:SS and press Enter to change the date and time. Usually we can use these three times to sort files or folders, as Linux ls sort.The easiest way to get the file creation date is with the stat command. (See below.) If the output is to a terminal, a total sum for all the file sizes is output on a line before the long listing. l (The lowercase letter ``ell''.) List in long format. c Use time when file status was last changed for sorting (-t) or long printing (-l). u Use time of last access, instead of last modification of the file for sorting (-t) or long printing (-l). rwxr-xr-x 1 ylspirit staff 12 Jun 11 22:27 file rwxr-xr-x 1 ylspirit staff 12 Jun 11 22:22 file rwxr-xr-x 1 ylspirit staff 12 Jun 11 22:24 file x Display information in a more verbose way as known from some Linux distributions. This format is passed directly to strftime(3). t timefmt Display timestamps using the specified format. Changing timestamps of a time to the current system time. s Display information in ``shell output'', suitable for initializing variables. That is, for all the fields in the stat structure, display the raw, numerical value (for example, times in seconds since the epoch, etc.). When run as readlink, error messages are automatically suppressed. Use stat again and we can see that the modification time is changed. Hence, we have modified the existing content with the new one. Next, we use the cat command to redirect some new content into file access. Below is shown the modification time of file access which is 22:24. There are some arguments to decide which timestamp to change (e.g. q Suppress failure messages if calls to stat(2) or lstat(2) fail. Now let’s try to change the modification time of a file. A utility to change the timestamps would be touch. n Do not force a newline to appear at the end of each piece of output. The information reported by stat will refer to the target of file, if file is a symbolic link, and not to file itself. See the FORMATS section for a description of valid formats. f format Display information using the specified format. F As in ls(1), display a slash (`/') immediately after each pathname that is a directory, an asterisk (`*') after each that is exe-cutable, an at sign after each symbolic link, a percent sign (`%') after each whiteout, an equal sign (`=') after each socket, and a vertical bar (`|') after each that is a FIFO.
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