blocks|key|378769|text|请注意，如果出于性能原因使用noatime挂载了文件系统，那么atime可能会显示创建时间。鉴于noatime会带来巨大的性能提升(通过在每次读取文件时删除磁盘写操作)，它可能是一个明智的配置选项，也可以提供您想要的结果。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|378770|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

<p>Note that if you've got your filesystem mounted with noatime for performance reasons, then the atime will likely show the creation time. Given that noatime results in a massive performance boost (by removing a disk write for every time a file is read), it may be a sensible configuration option that also gives you the results you want.</p>


blocks|key|378816|text|mikyra的回答是good.The事实，就像他说的那样。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|378817|[jason@rh5+test]$+stat+test.txt
++File:+`test.txt'
++Size:+0+++++++++++++++Blocks:+8++++++++++IO+Block:+4096+++regular+empty+file
Device:+802h/2050d++++++Inode:+588720++++++Links:+1
Access:+(0664/-rw-rw-r--)++Uid:+(++500/+++jason)+++Gid:+(++500/+++jason)
Access:+2013-03-14+01:58:12.000000000+-0700
Modify:+2013-03-14+01:58:12.000000000+-0700
Change:+2013-03-14+01:58:12.000000000+-0700|code-block|syntax|javascript|378818|如果要验证文件是首先创建的，可以在创建一系列文件时通过附加系统日期来构造文件名。|378819|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

<p>mikyra's answer is good.The fact just like what he said.</p>

<pre><code>[jason@rh5 test]$ stat test.txt
  File: `test.txt'
  Size: 0               Blocks: 8          IO Block: 4096   regular empty file
Device: 802h/2050d      Inode: 588720      Links: 1
Access: (0664/-rw-rw-r--)  Uid: (  500/   jason)   Gid: (  500/   jason)
Access: 2013-03-14 01:58:12.000000000 -0700
Modify: 2013-03-14 01:58:12.000000000 -0700
Change: 2013-03-14 01:58:12.000000000 -0700
</code></pre>

<p>if you want to verify wich file was created first,you can structure your file name by appending system date when you create a series of files.</p>


blocks|key|378856|text|ls+-i+menus.xml|type|unstyled|depth|inlineStyleRanges|entityRanges|data|378857|94490+menus.xml此处，数字94490表示inode|378858|然后执行以下操作：|378859|df+-h|378860|Filesystem++++++++++++Size++Used+Avail+Use%25+Mounted+on
/dev/mapper/vg-root+++4.0G++3.4G++408M++90%25+/
tmpfs+++++++++++++++++1.9G+++++0++1.9G+++0%25+/dev/shm
/dev/sda1+++++++++++++124M+++27M+++92M++23%25+/boot
/dev/mapper/vg-var++++7.9G++1.1G++6.5G++15%25+/var|code-block|syntax|javascript|378861|查找根"/“文件系统的挂载点，因为文件根在'/‘上，即’/dev/+menus.xml+/vg-menus.xml‘|378862|debugfs根目录'stat+<94490>‘/dev/+-R+/vg-<94490>|378863|输出可能如下所示：|378864|debugfs根目录'stat+<94490>‘/dev/+-R+/vg-<94490>|378865|debugfs+1.41.12+(17-May-2010)
Inode:+94490+++Type:+regular++++Mode:++0644+++Flags:+0x0
Generation:+2826123170++++Version:+0x00000000
User:+++++0+++Group:+++++0+++Size:+4441
File+ACL:+0++++Directory+ACL:+0
Links:+1+++Blockcount:+16
Fragment:++Address:+0++++Number:+0++++Size:+0
ctime:+0x5266e438+--+Wed+Oct+23+09:46:48+2013
atime:+0x5266e47b+--+Wed+Oct+23+09:47:55+2013
mtime:+0x5266e438+--+Wed+Oct+23+09:46:48+2013
Size+of+extra+inode+fields:+4
Extended+attributes+stored+in+inode+body:+
++selinux+=+"unconfined_u:object_r:usr_t:s0\000"+(31)
BLOCKS:
(0-1):375818-375819
TOTAL:+2|378866|在这里您可以看到创建时间：|378867|ctime:+0x5266e438+--+Wed+Oct+23+09:46:48+2013|378868|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|13|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|14|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|15|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|16|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|17|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|18|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|19|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1A|8|@]|9|@]|A|$]]|$1|U|3|V|5|J|7|1B|8|@]|9|@]|A|$K|L]]|$1|W|3|X|5|6|7|1C|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|J|7|1D|8|@]|9|@]|A|$K|L]]|$1|10|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|11|$]]

<h1>ls -i menus.xml</h1>

<p>94490 menus.xml
Here the number 94490 represents inode</p>

<p>Then do a:</p>

<h1>df -h</h1>

<pre><code>Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg-root   4.0G  3.4G  408M  90% /
tmpfs                 1.9G     0  1.9G   0% /dev/shm
/dev/sda1             124M   27M   92M  23% /boot
/dev/mapper/vg-var    7.9G  1.1G  6.5G  15% /var
</code></pre>

<p>To find the mounting point of the root "/" filesystem, because the file menus.xml is on '/' that is '/dev/mapper/vg-root'</p>

<h1>debugfs -R 'stat &lt;94490>' /dev/mapper/vg-root</h1>

<p>The output may be like the one below:</p>

<h1>debugfs -R 'stat &lt;94490>' /dev/mapper/vg-root</h1>

<pre><code>debugfs 1.41.12 (17-May-2010)
Inode: 94490   Type: regular    Mode:  0644   Flags: 0x0
Generation: 2826123170    Version: 0x00000000
User:     0   Group:     0   Size: 4441
File ACL: 0    Directory ACL: 0
Links: 1   Blockcount: 16
Fragment:  Address: 0    Number: 0    Size: 0
ctime: 0x5266e438 -- Wed Oct 23 09:46:48 2013
atime: 0x5266e47b -- Wed Oct 23 09:47:55 2013
mtime: 0x5266e438 -- Wed Oct 23 09:46:48 2013
Size of extra inode fields: 4
Extended attributes stored in inode body: 
  selinux = "unconfined_u:object_r:usr_t:s0\000" (31)
BLOCKS:
(0-1):375818-375819
TOTAL: 2
</code></pre>

<p>Where you can see the creation time:</p>

<pre><code>ctime: 0x5266e438 -- Wed Oct 23 09:46:48 2013
</code></pre>


blocks|key|378879|text|ls+-i+file+#output+is+for+me+68551981
debugfs+-R+'stat+<68551981>'+/dev/sda3+#+/dev/sda3+is+the+disk+on+which+the+file+exists

#results+-+crtime+value
[root@loft9156+~]#+debugfs+-R+'stat+<68551981>'+/dev/sda3
debugfs+1.41.12+(17-May-2010)
Inode:+68551981+++Type:+regular++++Mode:++0644+++Flags:+0x80000
Generation:+769802755++++Version:+0x00000000:00000001
User:+++++0+++Group:+++++0+++Size:+38973440
File+ACL:+0++++Directory+ACL:+0
Links:+1+++Blockcount:+76128
Fragment:++Address:+0++++Number:+0++++Size:+0
+ctime:+0x526931d7:1697cce0+--+Thu+Oct+24+16:42:31+2013
+atime:+0x52691f4d:7694eda4+--+Thu+Oct+24+15:23:25+2013
+mtime:+0x526931d7:1697cce0+--+Thu+Oct+24+16:42:31+2013
**crtime:+0x52691f4d:7694eda4+--+Thu+Oct+24+15:23:25+2013**
Size+of+extra+inode+fields:+28
EXTENTS:
(0-511):+352633728-352634239,+(512-1023):+352634368-352634879,+(1024-2047):+288392192-288393215,+(2048-4095):+355803136-355805183,+(4096-6143):+357941248-357943295,+(6144
-9514):+357961728-357965098|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|378880|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>ls -i file #output is for me 68551981
debugfs -R 'stat &lt;68551981&gt;' /dev/sda3 # /dev/sda3 is the disk on which the file exists

#results - crtime value
[root@loft9156 ~]# debugfs -R 'stat &lt;68551981&gt;' /dev/sda3
debugfs 1.41.12 (17-May-2010)
Inode: 68551981   Type: regular    Mode:  0644   Flags: 0x80000
Generation: 769802755    Version: 0x00000000:00000001
User:     0   Group:     0   Size: 38973440
File ACL: 0    Directory ACL: 0
Links: 1   Blockcount: 76128
Fragment:  Address: 0    Number: 0    Size: 0
 ctime: 0x526931d7:1697cce0 -- Thu Oct 24 16:42:31 2013
 atime: 0x52691f4d:7694eda4 -- Thu Oct 24 15:23:25 2013
 mtime: 0x526931d7:1697cce0 -- Thu Oct 24 16:42:31 2013
**crtime: 0x52691f4d:7694eda4 -- Thu Oct 24 15:23:25 2013**
Size of extra inode fields: 28
EXTENTS:
(0-511): 352633728-352634239, (512-1023): 352634368-352634879, (1024-2047): 288392192-288393215, (2048-4095): 355803136-355805183, (4096-6143): 357941248-357943295, (6144
-9514): 357961728-357965098
</code></pre>


blocks|key|378892|text|如果你真的想实现这一点，你可以使用像inotifywait这样的文件监视器。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|378893|您监视一个目录，并将有关文件创建的信息保存在该目录之外的单独文件中。|378894|while+true;+do
++change=$(inotifywait+-e+close_write,moved_to,create+.)
++change=${change#./+*+}
++if+[+"$change"+=+".*"+];+then+./scriptToStoreInfoAboutFile;+fi
done|code-block|syntax|javascript|378895|由于没有存储创建时间，因此您可以基于inotify构建自己的系统。|378896|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/rvoicilas/inotify-tools/wiki^0|I|B|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|Z|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|C|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

<p>If you really want to achieve that you can use a file watcher like <a href="https://github.com/rvoicilas/inotify-tools/wiki" rel="nofollow">inotifywait</a>.</p>

<p>You watch a directory and you save information about file creations in separate file outside that directory.</p>

<pre><code>while true; do
  change=$(inotifywait -e close_write,moved_to,create .)
  change=${change#./ * }
  if [ "$change" = ".*" ]; then ./scriptToStoreInfoAboutFile; fi
done
</code></pre>

<p>As no creation time is stored, you can build your own system based on inotify.</p>


blocks|key|160917|text|引用自https://unix.stackexchange.com/questions/50177/birth-is-empty-on-ext4/131347#131347的以下外壳脚本可用于获取创建时间：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|160918|get_crtime()+{
+++for+target+in+"${@}";+do
+++++++inode=$(stat+-c+%25i+"${target}")
+++++++fs=$(df+"${target}"++%7C+tail+-1+%7C+awk+'{print+$1}')
+++++++crtime=$(sudo+debugfs+-R+'stat+<'"${inode}"'>'+"${fs}"+2>/dev/null+%7C+grep+-oP+'crtime.*--\s*\K.*')
+++++++printf+"%25s\t%25s\n"+"${target}"+"${crtime}"
+++done
}|code-block|syntax|javascript|160919|entityMap|0|LINK|mutability|MUTABLE|url|https://unix.stackexchange.com/questions/50177/birth-is-empty-on-ext4/131347#131347^0|3|2B|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

<p>Cited from <a href="https://unix.stackexchange.com/questions/50177/birth-is-empty-on-ext4/131347#131347">https://unix.stackexchange.com/questions/50177/birth-is-empty-on-ext4/131347#131347</a> , the following shellscript would work to get creation time:</p>

<pre><code>get_crtime() {
   for target in "${@}"; do
       inode=$(stat -c %i "${target}")
       fs=$(df "${target}"  | tail -1 | awk '{print $1}')
       crtime=$(sudo debugfs -R 'stat &lt;'"${inode}"'&gt;' "${fs}" 2&gt;/dev/null | grep -oP 'crtime.*--\s*\K.*')
       printf "%s\t%s\n" "${target}" "${crtime}"
   done
}
</code></pre>


blocks|key|160935|text|更好的是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|160936|lsct+()+
{+
++++debugfs+-R+'stat+<'`ls+-i+"$1"+%7C+(read+a+b;echo+-n+$a)`'>'+`df+"$1"+%7C+(read+a;+read+a+b;+echo+"$a")`+2>+/dev/null+%7C+grep+--color=auto+crtime+%7C+(+read+a+b+c+d;
++++echo+$d+)
}|code-block|syntax|javascript|160937|lsct+/etc|160938|Wed+Jul+20+19:25:48+2016|160939|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<p>even better:</p>

<pre><code>lsct () 
{ 
    debugfs -R 'stat &lt;'`ls -i "$1" | (read a b;echo -n $a)`'&gt;' `df "$1" | (read a; read a b; echo "$a")` 2&gt; /dev/null | grep --color=auto crtime | ( read a b c d;
    echo $d )
}
</code></pre>

<h1>lsct /etc</h1>

<p>Wed Jul 20 19:25:48 2016</p>


blocks|key|160957|text|添加到你的武器库中的另一个技巧如下：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|160958|$+grep+-r+"Copyright"+/<path-to-source-files>/src|code-block|syntax|javascript|160959|一般来说，如果一个人更改了一个文件，他们应该在“版权”中主张信用。检查结果中的日期、文件名、贡献者和联系电子邮件。|160960|grep结果示例：|160961|/<path>/src/someobject.h:+*+Copyright+2007-2012+<creator's+name>+<creator's+email>(at)<some+URL>>|160962|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

<p>Another trick to add to your arsenal is the following:</p>

<pre><code>$ grep -r "Copyright" /&lt;path-to-source-files&gt;/src
</code></pre>

<p>Generally speaking, if one changes a file they should claim credit in the “Copyright”. Examine the results for dates, file names, contributors and contact email.</p>

<p>example grep result:</p>

<pre><code>/&lt;path&gt;/src/someobject.h: * Copyright 2007-2012 &lt;creator's name&gt; &lt;creator's email&gt;(at)&lt;some URL&gt;&gt;
</code></pre>


blocks|key|378983|text|stat+-c+%25w+a.txt|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|378984|%25w返回文件创建(出生)日期(如果可用)，这种情况很少见。|unstyled|offset|length|style|CODE|378985|这是link|378986|entityMap|0|LINK|mutability|MUTABLE|url|https://www.howtogeek.com/451022/how-to-use-the-stat-command-on-linux/#:%257E:text=%2525w%253A%2520The%2520time%2520of%2520file%2520birth%252C%2520human-readable%252C%2520or%2520a%2520hyphen%2520%25E2%2580%259C-%25E2%2580%259D%2520if%2520unknown.^0|0|0|2|0|2|4|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|V|8|@$G|W|H|X|I|J]]|9|@]|A|$]]|$1|K|3|L|5|F|7|Y|8|@]|9|@$G|Z|H|10|1|11]]|A|$]]|$1|M|3|-4|5|F|7|12|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]]]

<pre><code>stat -c %w a.txt
</code></pre>
<p><code>%w</code> returns the file creation(birth) date if it is available, which is rare.</p>
<p>Here's the <a href="https://www.howtogeek.com/451022/how-to-use-the-stat-command-on-linux/#:%7E:text=%25w%3A%20The%20time%20of%20file%20birth%2C%20human-readable%2C%20or%20a%20hyphen%20%E2%80%9C-%E2%80%9D%20if%20unknown." rel="nofollow noreferrer">link</a></p>


<p>I'm using Bash on Debian GNU/Linux 6.0. Is it possible to get the file creation date/time? Not the modification date/time.
<code>ls -lh a.txt</code> and <code>stat -c %y a.txt</code> both only give the modification time.</p>


How to get file creation date/time in Bash/Debian?

文件系统

Debian

我在Debian GNU/Linux6.0上使用Bash。可以获取文件创建日期/时间吗？不是修改日期/时间。ls -lh a.txt和stat -c %y a.txt都只给出了修改时间。

问如何在Bash/Debian中获取文件创建日期/时间？
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