Linux Command to display filename and its datetime [closed] - linux

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I am trying to list the files in a directory along with date and time.
I tried using the below two commands:
ls
getting output as below:
abc.txt testFile.txt
Then
ls -ltr
getting output as below:
-rw-r--r-- 1 xxxxxxx domain users 23 Aug 22 09:00 RCS
-rw-r--r-- 1 xxxxxxx domain users 0 Sep 12 06:09 testFile.txt
I expect an output as:
Aug 22 09:00 RCS
Sep 12 06:09 testFile.txt

Answer 1

You can use below command to get the output as you needed :
ls -l|awk '{print $6,$7,$8,$9}'
We are using -l as long listing which will give you most of the information and then we will use awk command to fetch what we want. You can tweak the print statement as per your requirement.

Answer 2

As pointed out by F Hauri, it would be better to use a process substitution with stat and read from there, e.g.
while read time file;do
printf "%(%b %e %T)T %s\n" $time "$file"
done < <(stat -c '%Z %n' *)
Example Use/Output
$ while read time file;do
printf "%(%b %e %T)T %s\n" $time "$file"
done < <(stat -c '%Z %n' *)
Apr 12 15:36:38 comboboxfocus.c
Apr 12 15:36:38 comboboxfocus2.c
Nov 3 17:43:51 createonclick.c
Feb 28 19:01:54 cw-drawinput.c
Nov 28 07:08:19 debug.c
Apr 12 15:36:38 debugsig.c
Jun 20 16:35:32 evboxstruct.c
Jun 20 16:35:32 evboxstruct2.c
Aug 23 08:50:38 ex00-window.c
Aug 23 08:50:38 ex01-hello.c
Aug 23 08:50:38 ex02-packing.c
Aug 23 08:50:38 ex03-builder.c
Feb 28 19:01:54 exampleappmain.c
Feb 28 19:01:54 exampleappwin_final.c
Feb 28 19:01:54 exampleappwin_wsrch.c
Dec 11 03:56:00 examplewindow.c
Dec 16 10:11:15 file_dialog_new.c
Dec 11 03:56:00 infobarex.c
Dec 7 14:03:20 poppler_page.c
Either will work, but awk will likely be quite a bit faster.

Answer 3

Why not use stat command ?
stat -c "%z %n" *
or you can use find command with its "-printf" switch to get this :
find -maxdepth 1 -type -f -printf '%t %f\n'
Similar output can be fetched using the find command.

Answer 4

Intro
After reading all this thread, I think rprakash's answer is the more accurate, as they point to two standard indicated command: stat and find -maxdepth....
Another way, using ls | sed
You could write:
ls -og|sed -re 's/\S*\s+\S+\s+\S+\s+//'
But as bash could be very efficient and because I prefer to be able to choose time ouput format (strftime) as I want:
Clean bash way to list date and files:
based on rprakash's answer stat command, with pretty formatting, as David C. Rankin' purpose, but without useless forks:
Short oneliner:
while read tm fl;do printf "%(%b %e %T)T %s\n" $tm "$fl";done< <(stat -c %Z\ %n *)
More readable:
while read time file;do
printf "%(%b %e %T)T %s\n" $time "$file"
done < <(
stat -c '%Z %n' *
)
And if you want sorted list, you could add sort in this way:
while read time file;do
printf "%(%b %e %T)T %s\n" $time "$file"
done < <(
stat -c '%Z %n' * |
sort -n
)
Some explanations:
From man stat:
%x time of last access, human-readable
%X time of last access, seconds since Epoch
%y time of last data modification, human-readable
%Y time of last data modification, seconds since Epoch
%z time of last status change, human-readable
%Z time of last status change, seconds since Epoch
From man bash
while read ... do; ... ; done < <(stat ... | sort ..)
Process Substitution
Process substitution allows a process's input or output to be referred to
using a filename. It takes the form of <(list) or >(list). The process list
is run asynchronously, and its input or output appears as a filename. This
filename is passed as an argument to the current command as the result of the
expansion. If the >(list) form is used, writing to the file will provide
input for list. If the <(list) form is used, the file passed as an argument
should be read to obtain the output of list. Process substitution is sup‐
ported on systems that support named pipes (FIFOs) or the /dev/fd method of
naming open files.
When available, process substitution is performed simultaneously with parame‐
ter and variable expansion, command substitution, and arithmetic expansion.
printf "%(...)T" $UNIXTIME
printf [-v var] format [arguments]
...
%(datefmt)T
causes printf to output the date-time string resulting from
using datefmt as a format string for strftime(3). The corre‐
sponding argument is an integer representing the number of sec‐
onds since the epoch. Two special argument values may be used:
-1 represents the current time, and -2 represents the time the
shell was invoked. If no argument is specified, conversion
behaves as if -1 had been given. This is an exception to the
usual printf behavior.