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55
votes
7answers
115k views

How to find creation date of file?

I want to find out the creation date of particular file, not modification date or access date. I have tried with ls -ltrh and stat filename.
33
votes
3answers
14k views

Birth is empty on ext4

I was just reading up on the Birth section of stat and it appears ext4 should support it, but even a file I just created leaves it empty. ~ % touch test ...
16
votes
1answer
27k views

What does this process STAT indicates?

If you check the STAT column in above image you will see Ss S S< SN and R+ What does this indicates ? Process states. If yes,Then what is the significance of 'Ss S< SN and R+'?
11
votes
1answer
2k views

When was `relatime` made the default?

What is the first Linux kernel release to set relatime as the default mount option?
8
votes
1answer
2k views

Does inotify fire a notification when a write is started or when it is completed?

Imagine two processes, a reader and a writer, communicating via a regular file on an ext3 fs. Reader has an inotify IN_MODIFY watch on the file. Writer writes 1000 bytes to the file, in a single ...
6
votes
2answers
1k views

What can you do to a file without triggering the “Change” Timestamp?

What can you do to a file without triggering the "Change" stat? For instance, it appears that simply changing a bit will trigger Change.
6
votes
1answer
5k views

Linux - File change time versus modification time

I'm using Ubuntu 12.04, though I'd imagine this question spans all Linux variants. In the manpage for the stat command, there are two (four) formatting options that appear to mean the same thing: ...
6
votes
3answers
5k views

Determine if a file has been modified

In Linux (currently using ext4 filesystem), how can one check quickly if the contents of a file has been modified without reading any of its contents? Is the stat command a recommended approach? I ...
6
votes
2answers
1k views

Change file creation time on a FAT filesystem

I need a way to change the creation time of a file on a mounted FAT32 volume. I have to do that because my MP3 player will only read files sorted by this creation time. If I can find a way to set the ...
6
votes
3answers
3k views

How to inspect group permissions of a file

I would like to inspect group permissions of a file from a bash script. Specifically, I need to check whether a file has the group writeable bit on. That's it. Simple as that. However: I also need ...
6
votes
3answers
2k views

Equivalent of date --reference in Solaris

The GNU implementation of the date command has a nice feature to show the date of the last modification of a reference file. Then using the +FORMAT parameter it's easy to get the date in any format, ...
6
votes
1answer
889 views

stat: print time in “long-iso” format

For my script, I would like to have stat command to print time in a nice, human friendly, way: 2015-02-04 00:48:31. ls calls this format long-iso and it can be used like this: $ ls -lA ...
5
votes
5answers
530 views

Is it possible to run ls or find and pipe it through stat?

Is there a way to run ls or find to get the list of files within a directory and then run stat to get all of the specific information (i.e. File Group, File Name, File Owner, File Size (displayed in ...
5
votes
1answer
512 views

What does 'stat' mean in this sentence?

This sentence is from a Linux command's return,I can only thought it as 'statistics' but it is the noun form rather than the verb form. unable to stat ./config-2.6.32-431.el6.i686: No such file or ...
5
votes
1answer
1k views

What is “raw mode in hex” from stat output?

When using GNU stat to probe the filesystem, there are a number of format sequences available for the --format/--printf arguments; this one in particular %f Raw mode in hex doesn't make much ...
5
votes
2answers
6k views

file block size - difference between stat and ls

I've noticed that when I do a: ls -ls file It provides block count, say 8 blocks. When I do: stat file I notice that the block count is 16, twice the number given by ls. The block size on my ...
5
votes
1answer
134 views

stat file system sizes

With stat 8.13 on a Debian based Linux - among many others - the following FORMAT directives (--format=) are offered: In combination with --file-system (-f): %s Block size (for faster transfers) ...
5
votes
1answer
50 views

How to find the number of bytes rewritten to a folder hierarchy?

I want metrics for how much writing and reading have been done to a folder. vmstat -d gives metrics at the whole disk level. iotop will give per process rw stats. But how can I find out how much ...
4
votes
5answers
775 views

How to cut a date/timestamp String?

So I am using TIMESTAMP=$( stat -c "%y" $JARNAME.jar ) print $TIMESTAMP and its output is something like 2015-04-24 17:23:03.000000000 -0500 I need only the 2015-04-24 17:23:03 part
4
votes
3answers
6k views

using stat to provide timestamp for touch

Am trying to OCR some documents insitu (from a linux command line on a windows share). The process of OCRing is find and I have muddled through using the find command to pipe the files through the ...
4
votes
2answers
355 views

change file size format when using stat

The formatting character %s makes stat print the filesize in bytes # stat -c'%A %h %U %G %s %n' /bin/foo -rw-r--r-- 1 root root 45112 /bin/foo ls can be configured to print the byte size number ...
4
votes
2answers
2k views

Output of stat on OSX

I want to use the stat command to get information on a file. I did this: Josephs-MacBook-Pro:Desktop Joseph$ echo 'hello' > info.txt Josephs-MacBook-Pro:Desktop Joseph$ stat info.txt 16777220 ...
4
votes
1answer
613 views

How to compare attributes of two files on Linux ext4

cmp(1) will of course tell me if the contents of two files are identical, but in order to test restoring from backups I also wanted to compare the relevant (!) file attributes. So if I did something ...
4
votes
2answers
2k views

Access history of a file [duplicate]

I was wondering if there are any tools to keep track of the access history of a file. I know of stat, but as far as I understand, it only returns information about the last time the file was accessed. ...
4
votes
1answer
723 views

Efficiency of lots of inotify watches or stat calls

I am developing software that will utilize inotify to track changes on a large amount of files (tens to hundreds of thousands of files). I have come up with these ideas: one watch per file one watch ...
3
votes
1answer
319 views

How can I see a file's historical modification times? [duplicate]

stat outputs a file's last modification time. How can I see a list of all the times a file was modified? For example, I'd like to edit a file 5 times, and see 5 modification times.
3
votes
4answers
483 views

get file size and line count at the same time

I'm looking for a way to list all files in a directory, with both their size, and a line count. Right now I'm using stat -c \"%s %n\" /directory/* to get file names and sizes, and I know I can use ...
3
votes
2answers
390 views

Determining if a file system object is a procfs/sysfs/etc. “virtual file” which doesn't report its length correctly

Some kinds of pseudo-files, like many in the procfs and sysfs virtual file systems, have no file size (stat returns st_size == 0) and do not support SEEK_END in fseek. These file system objects, such ...
3
votes
1answer
1k views

Is there a way to view a list of timestamp history of a document/file via terminal/command line?

This seems like it's simple but for some reason, it's not: Problem: I've been writing a paper- not even a script...just an economics paper- over the last 3 months. I'm trying to determine how much ...
3
votes
2answers
809 views

Why do . and .. have a file size of 4 kB and 12 kB, respectively? [duplicate]

As displayed by ls -al, for example: drwxr-xr-x 9 jb jb 4.0K Mar 8 18:05 ./ drwx------ 49 jb jb 12K Mar 17 14:15 ../ I assume this is the minimum amount of space required to store the inode's ...
3
votes
2answers
600 views

linux disk caching affects access times reported by stat?

On Ubuntu 12.04 I did the following stat a file cat the same file stat the file again cat the file again after 5 min stat the file The access time reported at 3. reflects the point at which 2. was ...
3
votes
1answer
1k views

rsync and backup and changing timezone

I back up my pictures from my camera using rsync, using: rsync -vzrtl --progress --stats --timeout=0 host destination Now I was in a different timezone when I did my first backup then I moved to a ...
3
votes
1answer
5k views

Error when using stat, errno=2

The case is as this, I create many files, and after the file generation, I use stat to get the all files info under the directory. The purpose is to purge all the files which are old than the ...
3
votes
2answers
84 views

Why `find` likes `stat` or `fstat` so much?

I'm trying to make /usr/bin/find to show something meaningful without doing any sort of stat, with no useful results so far. If I forcefully inhibit stat, find stops descending into subdirectories at ...
3
votes
2answers
193 views

get timestamp of files presented by FOR loop

My aim is to find $files on some $devices and save them to one or more folders which are namend corresponding to a timestamp of each file. To get the timestamp I wanted to use stat. In contrast to ...
3
votes
1answer
82 views

stat on an encrypted volume in osx takes a long time

My workstation is a MacBook Pro with an SSD. For security reasons, my main volume is encrypted. I ran this command on a folder: time find . -exec stat {} + >/dev/null real 0m5.205s user ...
3
votes
1answer
64 views

How to list all inodes and blocks in file system which are available for unprivileged user

I'm trying to list all inodes and blocks in certain file system which are available and unused for unprivileged user. I tried stat -f but from what I've read it list nodes and block available for all ...
3
votes
1answer
208 views

Get device with major number 0 (btrfs subvolume)

When I stat a file on a btrfs subvolume I get a major device number of 0. Is there a reliable way to find the mount point of this device, without knowing in advance it is a btrfs subvolume? e.g. I'd ...
2
votes
2answers
295 views

Has the GNU coreutils stat tool changed?

Has the GNU coreutils (8.6) version of stat changed? After a recent update, some scripts I wrote that call stat are not working as expected; in particular, I had been making use of stat -c %Y ...
2
votes
3answers
2k views

cp launched from code results in cannot stat '/tmp/somedir' works in shell

I'm working on making some scripts more elegant by implementing them in a real x application etc... At some point in the scripts we basically want to take everything from a mounted removable storage ...
2
votes
1answer
86 views

What is the meaning of the mode mask names from stat(2) and chmod(2)?

The stat calls have a series of symbolic names for the various bits in the mode field. From the stat(2) manual page: The following mask values are defined for the file mode component of the st_mode ...
2
votes
3answers
137 views

How to determine if a soft link's target is a directory or a file?

Given the ll command outputs as follows #> ll lrwxrwxrwx ... How to determine if a soft link's target is a directory or a file from "lrwxrwxrwx"?
2
votes
1answer
991 views

Stat, Blocks and Sector size - ext4

While reading upon how files are stored in the filesystem, I created a testfile which happened to be of size 217 bytes. Checking the output of stat on this file, I saw that this file is occupying 8 ...
2
votes
1answer
2k views

Unable to stat symbolic link to file

Background I am trying to wrap my head around how html is unable to access a file via a symlink. I performed the following simple experiment to try and gain an understanding of how apache would be ...
2
votes
1answer
74 views

`stat -f` show a ext4 file system type as ext2/ext3

On Ubuntu 14.04, I am checking the ext4 filesystem for my home based on a file new in it: $ stat -f new File: "new" ID: 38d4cd29e44142c6 Namelen: 255 Type: ext2/ext3 Block size: 4096 ...
2
votes
1answer
602 views

Local, regular file causes `stat` or `ls -l` to hang

I've seen a few different questions about ls hanging. It's usually because they use the -l switch, which causes a stat on the file, which in turn is a bad symlink or pointing to an NFS mount or some ...
2
votes
2answers
596 views

Stat command detail information

I am running command stat -c%y filename on linux system. Output: 2014-03-08 13:26:29.335545828 -0800 I am not able to understand the last -0800 thing. Anyone have any idea?
2
votes
0answers
27 views

Linux file creation time. What are the requirement challenges in considering useful atribute? [closed]

I find many users are acquiescent to the fact that many linux/unix variants do not support/store the file creation time. Yet, I feel it has some relevance in operations and audit & trail. I see ...
2
votes
1answer
51 views

Using `stat` to determine filled blocks

How can I find the number of filled block of a certain file, using the stat function? I have already found the command $(stat -c%b "$FILENAME"), which gives the number of allocated blocks but I don't ...
1
vote
3answers
234 views

How to identify if a direcory is created by System or a root user?

How to identify if a directory is created by Linux system and by user like root. Example: in /etc there is a directory named sys which is created by Linux. And I logged in using root and created the ...