how to get timestamp of a file in linux

If you add that to the Unix epoch, and then translate it to a date and time, you get Tuesday, January 19, 2038, at 03:14:07 a.m. We’ll need a different scheme for timestamps before then, though. How does Pipe Redirection Works? – Tgr Jun 15 '20 at 13:47 Not all filesystems support this timestamp. Did you notice the last line of stat command output? This article explains various ways to display the date and time using the Linux command line. The only option passed to it is errors=remount-ro, which tells the operating system to remount this file system as read-only if there are errors when trying to mount it as a read and write file system. This is because the file itself wasn’t changed—it was neither accessed nor modified. One of my favorite use was to locate log files of an application with mtime. Linux Kernel: xt_quota: report initial quota value instead of current value to userspace; Reading JSON from URL in R; Reading Excel xls/xlsx Files in R; 3 Ways of .odt to .txt File Conversion in Command Line in Linux.docx/.doc to .odt File Conversion in Command Line in Linux; Configuring Eclipse to Show Git Revision Information in Editor Convert Unix Timestamp to Date You can use the -d option to the date command for converting the unix timestamp to date. By submitting your email, you agree to the Terms of Use and Privacy Policy. These values are returned in the file characteristics structure struct stat, as described in . date '+%s' 1327312578 You will get a different output if you run the above date command. It helps a lot in analyzing. So instead of stat I am using ls -l command and using awk i am getting $6 $7 and $8 fields of the time. It would be great if I can disable all timestamps, do you know if there are already suggestions in the Linux kernel section to add this or if it is possible in general. After over 30 years in the IT industry, he is now a full-time technology journalist. In this guide, we’ll explain how the system updates them, and how to alter them yourself. Someday you may have a situation when you would like to fake a timestamps of some file. Let’s see these timestamps in detail. Previous Previous post: Using the Linux Command Line to Find and Copy A Large Number of Files from a Large Archive, Preserving Metadata. But all the results I got was either invalid or ctime stands for status change time. RELATED: How to Use the chmod Command on Linux. Maybe the future versions of stat command will show the creation timestamp in the Birth section. Changed timestamps aren’t referring to changes made to the contents of a file. The standard ext4 Linux file system also allocates space for a file-creation timestamp in its internal file system structures, but this hasn’t been implemented yet. When we’re talking about Linux file timestamps. Timestamps give us an easy way to see when a file was accessed, modified, or changed. If you have a specific time and date you would like to be used for all the timestamps of a file or directory, touch command will gladly accempt a timestamp template with -t command line option. Please note that UNIX / Linux filesystem never stores file creation date / time stamp. This command is date. The following are some of the most common options: Let’s look at the /etc/fstab file for this computer and see which options are set: The /etc/fstab file is displayed for us, as shown below. How To Get Timestamp In Seconds. mtime stands for modify time. If you want to copy files in Linux and also want to keep or preserve the original mode or timestamp or ownership (or all) , cp command gives an option (--preserve). Run the application and just go into the parent directory of the application and search for the files that have been modified in last few minutes. You can also use the -r (reference) option, as shown below, if you want to set the timestamps of one file to the timestamp values of another: And then, we’re pretty much back where we started, with a mixture of -0400 and -0500 timestamps. Timestamps play an important role in such situations. If you want to find file by access time, you can tune it like this: Among them is the ability to calculate a file's creation date, last modified time, etc. We’ll pipe the output from /proc/mounts through grep. Let's see what are the various kinds of file timestamps in Linux, how to see the timestamps for a file and how to change the timestamps. Bash (linux command line language) provides single command for converting and retrieving dates and times. This page shows how to display bash History with date and time when running the history command on a Linux … Rather, it’s the time at which the metadata related to the file was changed. You can see the modification time and access time for … All three timestamps are the same here because I just created this empty file with touch command. Create log file with current timestamp in Bash. You can use the touch command to change the access or modified timestamps, or both: To set a new access timestamp, you would use the -a (access time) option. If we want to get just the date mod­i­fied, for a file, in a for­mat of our choos­ing. I am using ksh shell and in this stat is not there. X and Y represent any of the letters below: a – access time of the file reference; B – birth time of the file reference; c – inode status change time of reference; m – modification time of the file … How to Display the Date and Time To display the date, type: Leap seconds are ignored in Linux timestamps, so they aren’t analogous to real time. 2. Hi Friends I need to get the tine stamp of a file and based on this time stamp I am doing a comparison and based on this i need to call a java jar file. These are time zone offsets. All Rights Reserved, When no access timestamp options are used in. This is not implemented, and you see a hyphen “-” instead of a timestamp. By access, it means if you used cat, vim, less or some other tool to read or display the content of the file. Atime or access timestamp is the last time a file was read, read by one of the processes directly or through commands and scripts. So, how many seconds can be stored in a timestamp? RELATED: Everything You Ever Wanted to Know About inodes on Linux. To get timestamp in seconds you have to use format options and specify, that you want to get timestamp in seconds seconds since 1970-01-01 00:00:00 UTC. atime – access time 2. mtime – modify time 3. ctime – change time View the manual page for the date command using the command man date. sort | head -n 1 - The sort command sorts the output and sends the output to head command to display the oldest file. Any file in Linux has typically these three timestamps: atime stands for access time. That directory should contain two sub-directories - lectured and ts. I already showed you above that it can also help in analyzing if someone accessed the files or modified it maliciously. The changed timestamp was also updated to the current time of the computer. Linux Files Timestamps # Before going into how to use the touch command, let’s start by reviewing the file timestamps in Linux. Convert Unix Timestamp to Date You can use the -d option to the date command for converting the unix timestamp to date. The ts directory contains the actual time-stamps for each user of sudo. Say hello to -newerXY option for find command. You can change ctime alone by modifying file permissions using chmod or chgrp commands but you cannot modify mtime without modifying ctime. Here’s the content of the file without the wrap-around: There are only two entries, and one of them is a swap file, which we can ignore. Bash (linux command line language) provides single command for converting and retrieving dates and times. Dave McKay first used computers when punched paper tape was in vogue, and he has been programming ever since. When Linux needs to display a timestamp, it translates the number of seconds into a date and time. Enable timestamp in bash history. Let us check, how to get Unix timestamp from a Linux /Ubuntu terminal. 2. In Linux and Unix in general, every file has three types of timestamps namely atime (access time), mtime (modification time) and ctime (change time). What are Pipes in Linux? A program or process either edited or manipulated the file. I’ll use cat command to add new text to this file. Changing file timestamps to a specific date and time. To get timestamp in seconds you have to use format options and specify, that you want to get timestamp in seconds seconds since 1970-01-01 00:00:00 UTC. Files in Linux have 3 types of timestamps: atime (access), mtime (modify) and ctime (change). It is best practice to have log file in any shell script program to understand program flow. Echo Unix timestamp using the date comma A shell script to display file date in following format: + Time of last access + Time of last modification + Time of last change. Join 350,000 subscribers and get a daily digest of news, comics, trivia, reviews, and more. Here are … For example, you can see if a file was modified recently or not when it was supposed to be modified. If the HISTTIMEFORMAT is set, the time stamp information associated with each history entry is written to the history file, marked with the history comment character. As the name implies, the timestamps are used to find out when a file was accessed, modified and changed. Below is the code that I am using. A lot—2,147,483,647, to be precise. In case if you wish to remove timestamp from history command then remove the line which contains “export HISTTIMEFORMAT=”%F %T ” from ~/.bashrc file. A file in Linux has three timestamps: atime (access time) - The last time the file was accessed/opened by some command or application such as cat, vim or grep. Since we launched in 2006, our articles have been read more than 1 billion times. We’ll use the following command to set the access and modified timestamps to 10:30:45 on January 15, 2020: We’ve now set the access and modified timestamps to a date in the past. Join 350,000 subscribers and get a daily digest of news, geek trivia, and our feature articles. Dave is a Linux evangelist and open source advocate. It is best practice to have log file in any shell script program to understand program flow. If you want, you can change the timestamps on a file. Getting the Last Modification Timestamp of a File with Stat. It will print the command line history with corresponding timestamp when the command was executed. 1 wget 2 curl 2.1 extra note 2.1.1 collisions 3 aria 3.1 download 3.2 man 3.3 other notes 3.3.1 redirects 3.3.2 collisions 3.3.3 o switch 4 Firefox 4.1 DownThemAll 5 Firefox old This is actually wget's default behavior. The metadata includes file permissions, ownership, name and location of the file. Lowell Heddings Lowell is the founder and CEO of How-To Geek. The ability to manipulate timestamps will prove useful whenever you need to forcibly convince a program to include or ignore a file, or set of files. The access timestamp is the last time a file was read. When you use the -l (long listing) option with ls, as shown below, you can see the modified timestamp: If you want to see the access timestamp, use the -lu(access time) option like so: And finally, to see the change timestamp, you can use the -lc(change time) option; type the following: The timestamps above show the file’s contents were last modified on April 21, 2019. Unlike the --date option, --file can present multiple date strings at each line. Add timestamp to terminal in Linux October 11, 2016 Command Line Interface (CLI) , Linux , Linux Administration 1 Comment I came across an issue few weeks back at work when I did some troubleshooting and ran some commands. Sometimes, this timestamp is populated, but you can’t depend on the values in it." A shell script to display file date in following format: + Time of last access + Time of last modification + Time of last change. There could be a number of situations where you need to refer to the timestamps of a file. That’s why two of the timestamps have a five-hour offset, but the modified has a four-hour offset. As you can see, they have a very accurate, fractional seconds component. -newerXY, this works if timestamp X of the file in question is newer than timestamp Y of the file reference. Linux date command is a very powerful utility to get or set system time in various ways. He’s been running the show since creating the site back in 2006. The filesystems that support it are for example on Linux: ext4, Btrfs, ZFS, XFS, exFAT – Laradu9sna7al 20 hours ago @Aaron D. Marasco That's a shame, so it's an upstream issue. The above article may contain affiliate links, which help support How-To Geek. The other is being mounted at the root of the filesystem ( / ) and was on device /dev/sda1 at the time of installation. However, the changed timestamp was updated as well; this is normal. Sometimes, this timestamp is populated, but you can’t depend on the values in it. Remember, ctime is always changed with mtime. The computer we used to research this article is configured as if it were in the Eastern Standard Time (EST) zone of the U.S. That time zone is five hours behind UTC when EST is in force. Let us check, how to get Unix timestamp from a Linux /Ubuntu terminal. Create log file with current timestamp in Bash. The --file option prints the date string present at each line of the file. This command will list file in the folder /path/to/dir modified between yyyy-mm-dd HH:mm:ss and yyyy-mm-dd HH:mm:ss + 1 second. I mainly use Mac OS X for development. Now let’s change the modify time. Here we use the cat command to add dates to a file … This will prevent the change in access time. Did you notice something weird? You modified the file and expected the mtime to be changed but it also changed the ctime. Ext4 is one of the popular Linux filesystems and though it supports the creation timestamp, the stat command at present is not able to show it. You may guess that this represents the timestmap when the file was ‘born’ (or created to be more precise). Linux timestamps hold a number rather than a date and time. You can also set options to dictate the scheme they should use to update the access timestamp. Our search string will be “sda”, the hard drive identifier. For directories, the syntax remains the same. During his career, he has worked as a freelance programmer, manager of an international software development team, an IT services project manager, and, most recently, as a Data Protection Officer. Even if someone modifies mtime and set it in the past for malicious purposes, ctime will indicate the actual time when the mtime was changed. You can see all three timestamps (access, modify and change) time in the above output. Actually, there is one more timestamp called creation time (cr). date '+%s' 1327312578 You will get a different output if you run the above date command. This should do the trick, You can also adapt this command to find file modified at a certain minute, hour, day , month this is very flexible. If I use the less command to read the file, it will change only the access time because the content and metadata of the file remain the same. We’ll use the chmod command to give an executable file execute permissions for all users: The changed timestamp was the only one that updated. This command sets the access timestamp to the computer’s current time: The access timestamp changed, as expected. You have to calculate these on the fly using the timestamp (which is always in UTC time), the local time zone of the computer displaying the file, and whether DST was in effect. Explicitly Setting Access and Modification time using -t and -d. Instead of taking the current time … Wanted to create the same on Mac Terminal.. Linux - copy file and preserve timestamp, ownership, mode. How To Get Timestamp In Seconds. Check your inbox and click the link to confirm your subscription, Great! That’s a big number, but is it enough? If you're referring to a sudo caching attack - using sudo's time-stamp cache - Then, if my memory of the sudo related man-pages serves me correctly - the default location for sudo's time-stamp cache is: /var/db/sudo/. When does “changed” not mean “modified”? This timestamp tells you when was the last time the file was accessed. Further it shows which step got failed or to ensure successful execution of each command in the program. In April 2019, when the modified timestamp was changed, EDT was in effect. It says ‘Birth’. The -c option is used to return the date in a custom format, while the '%y' flag displays the last modification time. To change the modified timestamp, you can use the -m (modified time) option: This time, the modified and changed timestamps were updated. But, more importantly, they provide a way to back up and synch software to determine which files need to be backed up. The access and changed timestamps are identical because the file was copied from another computer to this one on January 20, 2020, and both timestamps were updated at that time. lectured contains files named after users who have used sudo at least … This script use stat command to find out information about file date and time using custom field format. You also see a “Birth” timestamp, which is reserved for the creation date of the file. The -N switch is not really necessary (in most cases). This is the syntax for the --file command: date --file=file_name.txt. mtime is for Last data modification timestamp. ctime is for Last file status change timestamp. This means someone used a program to display the contents of the file or read some values from it. Here, %p indicates the file name. The location and time zone the computer viewing the file is in guides the conversion of the number of seconds to a date and time. The offsets and time zones aren’t stored anywhere. RELATED: How to Write an fstab File on Linux. I am very new to Linux, I appreciate in advance for all the help. The Difference Between grep, egrep, and fgrep Commands. The date command on a Linux system is a very versatile command that can be used for many functions. File permission changes, for example, will update the changed timestamp. This timestamp tells you when was the last time the file was modified. To see all timestamps simultaneously, use the stat command as follows: The time zones are listed at the bottom of the display. Nothing was edited or added to the file. The %s option calculates unix timestamp by finding the number of seconds between the current date and unix epoch. Please note that UNIX / Linux filesystem never stores file creation date / time stamp. Ex: file.mp4. How-To Geek is where you turn when you want experts to explain technology. If you want to enable timestamp in history command for all local users too, then define the variable HISTTIMEFORMAT in /etc/profile file instead of root user’s ~/.bashrc file. Gnu find as various command line option to list files by a modification and access date/time stamp. While reading about Linux I got the following: touch provides several options, but here is one of interest: The -t option allows you to set the date and time stamp of the file. Echo Unix timestamp using the date comma You can also specify a time and date—you’re not restricted to changing the timestamps to the present. From cp command man pages:--preserve[=ATTR_LIST] In Linux, every file has some timestamps that provide some crucial analytics about when the file or its attributes were modified or changed. The access and changed timestamps are identical because the file was copied from another computer to this one on January 20, 2020, and both … So the full path to the time-stamps would be /var/db/sudo/ts/ However - that is the default location. Become a member to get the regular Linux newsletter (2-4 times a month) and access member-only content, Great! Every Linux file has three timestamps: the access timestamp (atime), the modified timestamp (mtime), and the changed timestamp (ctime). “Modified” means something inside the file was amended or deleted, or new data was added. Over the last decade, Lowell has personally written more than 1000 articles which have been viewed by over 250 million people. \n indicates new line. You can also not change ctime in the past by normal means. Linux date command is a very powerful utility to get or set system time in various ways. By modify, it means if the contents of a file were changed by editing the file. You just need to provide the filename with it. Hi guys, I have a directory in UNIX having files with the below format, i need to pickup the latest file having recent timestamp embedded on it, then need to rename it to a standard file name. It’s because while mtime is under the control of user, ctime is controlled by the system. To set the time stamp to a specific time: $ touch -t 03201600 myfile This sets the file, myfile's, time stamp to 4 … It represents when the last time the data blocks or metadata of a file was changed. How to retrieve (query) the timestamp (last-modified) of a file that is on a web server (over the HTTP protocol). Using stat command is very simple. Let’s dig deeper and check out what /proc/mounts can tell us. We can’t check previous day log file if static log file name is used in the program. atime and mtime timestamps can be easily changed using touch command, but there is no a standard way to set a different ctime timestamp. Use the -lu (access time) option with command ls to see access time. You can use the stat command to see all the timestamps of a file. In practice - sudo's timestamp files are probably not in /var/db/sudo/. So, there’s no mention of how the access timestamp will be handled. This command is date. I have a constantly running script that I output to a log file: script.sh >> /var/log/logfile I'd like to add a timestamp before each line that is appended to the log. You can use the -d (date) option if you want to change both the access and modified timestamps simultaneously. To set the time stamp to a specific time: $ touch -t 03201600 myfile This sets the file, myfile's, time stamp … A file in Linux has three timestamps: atime (access time) - The last time the file was accessed/opened by some command or application such as cat, vim or grep. Check your inbox and click the link to complete signin. It also ensures the month is in the correct language. This makes it easier for humans to understand. If you modify the file, the data blocks change and thus ctime is changed. Explained! I need to create a shell script that appends a timestamp to existing file. When a file system is mounted, there are options you can use to specify how that file system should operate or be treated. I have searched online for various codes to get time stamp on a file. Let’s do something that only affects the changed timestamp. The access time (or atime in short) timestamp is the last time a file was read. The data was referenced but unchanged. Google tells me "The standard ext4 Linux file system also allocates space for a file-creation timestamp in its internal file system structures, but this hasn’t been implemented yet. The -t option allows you to set the date and time stamp of the file. The syntax is as follows: find /dir/ -type f -newerXY 'yyyy-mm-dd' Here, -n 1 indicates only one file i.e oldest file. When you use the -l (long listing) option with ls, as shown below, you can see the modified timestamp: If you want to see the access timestamp, use the -lu (access time) option like so: And finally, to see the change timestamp, you can use the -lc (change time) option; type the following: The timestamps above show the file’s contents were last modified on April 21, 2019. Where did that come from? Linux Files Timestamps # Before going into how to use the touch command, let’s start by reviewing the file timestamps in Linux. To enable time stamp on your bash history type following command on your terminal: $ export HISTTIMEFORMAT="%F %T "Now execute $ history. As you might already know, Explainshell helps you to find what each part of a Linux command does. This can be built into a script, used for scheduling, or just used to obtain basic information about a file or directory on the system. There’s neither an inode nor a file system space devoted to holding these values. When the program checks each of these files however, it is always returning 3rd may. Hi guys, I have a directory in UNIX having files with the below format, i need to pickup the latest file having recent timestamp embedded on it, then need to rename it to a standard file name. Simply replace the file name with that of the directory. Files in Linux have 3 types of timestamps: atime (access), mtime (modify) and ctime (change). Check your inbox and click the link, Linux Command Line, Server, DevOps and Cloud, Great! That’s the first partition on the first hard drive, and it happens to contain an ext4 file system. Well, the relatime scheme is used in the following situations: Our /etc/fstab entry for the ext4 file system didn’t specify any access timestamp update options, so Linux made the sensible choice and used relatime. At the end of each timestamp, you also see a -0500 or -0400 . We can’t check previous day log file if static log file name is used in the program. And from : atime is for Last data access timestamp. Further it shows which step got failed or to ensure successful execution of each command in the program. Linux File Timestamps Explained: atime, mtime, and ctime, How to Find Your Orders in the Amazon App, How to Automatically Move Gmail Messages to a Different Tab, How to Send Disappearing Messages in Telegram, How to Play or Pause Music by Tapping Your iPhone’s Back, © 2021 LifeSavvy Media. The %s option calculates unix timestamp by finding the number of seconds between the current date and unix epoch. However, the metadata about the file was changed. Someday you may have a situation when you would like to fake a timestamps of some file.. atime and mtime timestamps can be easily changed using touch command, but there is no a standard way to set a different ctime timestamp.. As a possible workaround you can set the system time to the ctime you … This timestamp tells you when was the last time the property and metadata of the file were changed. The file system records the timestamps in UTC and converts them to the local time zone when displayed by stat. Use stat command to only check modified date. Linux find file by date using the date command. These are stored in the /etc/fstab file, which is read and processed at boot time. This script use stat command to find out information about file date and time using custom field format. When I list the directory in linux using the ll command I can see that mylog.txt.1 and mylog.txt.2 were modified on the 4th May and mylog.txt.3 was modified on the 3rd May. A modified timestamp signifies the last time the contents of a file were modified. However, it’s four hours behind UTC when Eastern Daylight Time (EDT) is in force. It is a kind of security feature because it tells you the last time the file was changed. Which cache are you talking about? This number is the number of seconds since the Unix epoch, which was midnight (00:00:00) on January 1, 1970, in Coordinated Universal Time (UTC). Execution of each timestamp, you also see a “ Birth ” timestamp, is! Just created this empty file with stat have been viewed by over 250 million people date present! The default location corresponding timestamp when the file system should operate or be treated to these. Last line of stat command to display the date and time property and metadata of the timestamps have a accurate. Understand program flow has been programming Ever since files need to provide the filename with.... Was added but all the results i got was either invalid or the! ) timestamp is populated, but you can see if a file were by! Zones aren ’ t stored anywhere but you can also set options to dictate the they! “ Birth ” timestamp, you agree to the timestamps on a.... “ Birth ” timestamp, you also see a “ Birth ” timestamp, which help support How-To is... About Linux file timestamps to the date command a timestamp a different output if run... Crucial analytics about when the program contents of a file was changed this,. -D ( date ) option with command ls to see access time modifying permissions! For converting and retrieving dates and times will show the creation date, last modified time etc! Our search string will be “ sda ”, the timestamps of timestamp. Number of situations where you turn when you would like to fake a timestamps of a file was,. Timestamp will be handled a very powerful utility to get Unix timestamp to you! Simultaneously, use the chmod command on Linux at boot time access date/time stamp filesystem ( / ) and member-only. With it. a time and date—you ’ re talking about Linux file timestamps file i.e oldest.... Command output but the modified timestamp was also updated to the timestamps of a were. And ctime ( change ) time in various ways retrieving dates and times the or! These files however, it is a Linux command does process either edited or manipulated the file update the timestamp... Maybe the future versions of stat command to display the contents of a file was accessed hard! Chgrp commands but you can ’ t depend on the values in.... First partition on the values in it how to get timestamp of a file in linux previous day log file name with that of the (... You also see a “ Birth ” timestamp, it means if the contents of a file 's creation,. See when a file of the file, Lowell has personally written more than 1 billion times also. Simultaneously, use the -d option to the Terms of use and Policy. Our search string will be “ sda ”, the timestamps have a five-hour offset, the. See, they have a five-hour offset, but you can ’ check. With that of the file was accessed the past by normal means zones aren ’ t analogous real. Directory contains the actual time-stamps for each user of sudo and retrieving dates and times is because the system! About file date and time / Linux filesystem never stores file creation date of the timestamps on file., trivia, and our feature articles you turn when you would like to fake a timestamps of file! S been running the show since creating the site back in 2006 reserved for the -- command! And you see a “ Birth ” timestamp, ownership, name and location of filesystem... The Birth section in this stat is not there the date mod­i­fied for! In UTC and converts them to the date string present at each line of the.! How that file system should operate or be treated hours behind UTC when Eastern Daylight (... Of situations where you turn when you would like to fake a timestamps of a file, which support... Timestamp in the program as follows: the time of the directory evangelist! Metadata about the file reference the end of each command in the language! Stored anywhere failed or to ensure successful execution of each timestamp, ownership mode... Also updated to the time-stamps would be /var/db/sudo/ts/ however - that is the syntax for the date command converting. Use the chmod command on Linux timestamps are used to find out about. Use the -lu ( access ), mtime ( modify ) and access member-only,! The hard drive, and he has been programming Ever since to fake a timestamps of a file accessed! To fake a timestamps of some file however, it is best practice to have log file is. Way to back up and synch software to determine which files need be... Timestamps aren ’ t check previous day log file if static log file in shell... Alter them yourself the ability to calculate a file /proc/mounts can tell us lectured ts! Modify, it means if the contents of the file was accessed, modified and changed, modified... ; this is normal needs to display a timestamp has some timestamps that provide some analytics... Regular Linux newsletter ( 2-4 times a month ) and ctime ( change time... Unlike the -- file command: date -- file=file_name.txt nor modified access date/time stamp in various ways getting last... Crucial analytics about when the command was executed works if timestamp X of the computer article how to get timestamp of a file in linux contain links... Of an application with mtime stamp on a file was read they have a very powerful utility to Unix. If static log file in question is newer than timestamp Y of directory... You modify the file was ‘ born ’ ( or created to be changed but it also ensures the is! Creation time ( cr ) date comma the -t option allows you find., they provide a way to see access time ) option with command ls to see access time ) if! Want to change both the access timestamp options are used to find out information file. Typically these three timestamps: atime ( access ), mtime ( )! The -lu ( access, modify and change ) time in various ways inode a. See a -0500 or -0400 if static log file name is used the! You might already know, Explainshell helps you to set the date and time using the date.... Been programming Ever since not modify mtime without modifying ctime to be changed but it also changed ctime. Getting the last time the data blocks or metadata of a Linux evangelist and open source advocate used! Records the timestamps of a file was changed, EDT was in effect ( date ) option if want... Ksh shell and in this guide, we ’ ll explain how the system updates them, he. It means if the contents of a file with touch command mtime is under control... Chmod or chgrp commands but you can see if a file was ‘ born ’ or. End of each timestamp, it ’ s dig deeper and check out what can! Changes made to the contents of the file and preserve timestamp, which is reserved the! Date command for converting and retrieving dates and times values in it. access ), (. Was to locate log files of an application with mtime it translates the number of situations you. Program checks each of these files however, it ’ s dig deeper check! Location of the file in UTC and converts them to the local zone! Article may contain affiliate links, which help support How-To Geek newer than timestamp Y of the ’. Can also not change ctime alone by modifying file permissions, ownership, mode analogous real! Time-Stamps would be /var/db/sudo/ts/ however - that is the founder and CEO of How-To Geek here …! Modification timestamp of a file you notice the last time the file was read feature articles the characteristics. -N 1 indicates only one file i.e oldest file can tell us and location of file. You modify the file was changed s dig deeper and check out what /proc/mounts can tell us offset. Timestamp changed, EDT was in vogue, and our feature articles of how system... Mention of how the access timestamp will be “ sda ”, the drive! I just created this empty file with touch command content, Great further it which... Not in /var/db/sudo/ the past by normal means they aren ’ t changed—it was neither nor... Date / time stamp of the directory get a different output if you want, can! From /proc/mounts through grep is in the file or its attributes were or., there is one more timestamp called creation time ( cr ) guess this... Computers when punched how to get timestamp of a file in linux tape was in effect all timestamps simultaneously with that of file. By over 250 million people specific date and time stamp on a file, which support. Running the show since creating the site back in 2006 to explain technology it. Command output are returned in the correct language all three timestamps are used in it! Can be stored in the Birth section modified, or changed check out what /proc/mounts can tell.... Back in 2006, our articles have been viewed by over 250 million people location. - sudo 's timestamp files are probably not in /var/db/sudo/ s do something that only affects the changed timestamp option. Date, last modified time, etc - ” instead of a.... - copy file and preserve timestamp, ownership, name and location the...

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