Improve company productivity with a Business Account.Sign Up

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 628
  • Last Modified:

Check for the NEWEST file in a linux directory & cp the NEWEST file to from /path1/file.txt to /path2/file2/txt

       I need to pull the lastest file from a directory so the script needs to check by when the file was most recently added. Is this possible? If not, an alternative would be to look at a file with the highest number after a certain part of the file name and copy that file to path 1. So if the files are name sequentially, the higher number after the name portion of the file would need to be pulled. Example /path1/stuff55555.txt and if that was the highest numbered file it would look at the number portion only of all files beginning with stuff and copy that file to /path2/file2/txt
0
libertyforall2
Asked:
libertyforall2
  • 4
  • 4
1 Solution
 
pwustCommented:
ls -rt --group-directories-first|tail -n1

Open in new window

This will give you the latest non-directory file in the current dir. You can reuse that snippet surrounded by $(( and )) in a cp command.
0
 
libertyforall2Author Commented:
cp $((ls -rt --/path -first|tail -n1)) /path2

I'm getting illegal variable name.
0
 
tel2Commented:
Hi lfa2,

Your error is probably the result of you partially replacing "--group-directories-first" with a path name.  Don't do that, because it is a switch for some versions of the "ls" command.  To see if your "ls" command allows that switch, just type this from the command line:
    ls --group-directories-first
and report back here.
It looks as if pwust's command is meant to be run from the source folder (i.e. cd there first).

Questions:
1. Do you need to cater for the scenario where the newest file could be not yet completely written, when this proposed script tries to take a copy of it?
2. If so, how long should we allow for the file to be completely written, at the longest?
0
Simplify Active Directory Administration

Administration of Active Directory does not have to be hard.  Too often what should be a simple task is made more difficult than it needs to be.The solution?  Hyena from SystemTools Software.  With ease-of-use as well as powerful importing and bulk updating capabilities.

 
pwustCommented:
Please rety with using back ticks:
cp `ls -rt --group-directories-first|tail -n1` /path2

Open in new window


Piping within a $(( )) environment usually causes problems.
0
 
pwustCommented:
Another suggestion, now with the source path:

cp `ls -rt --group-directories-first /path1|tail -n1` /path2

Open in new window


Hope this helps.
0
 
libertyforall2Author Commented:
I tried this

cp `ls -rt --group-directories-first /path1|tail -n1` /path2 

Open in new window


I get this error message

-------
ls: unrecognized option '--group-directories-first'
try 'ls --help' for more information.
cp:missing destination file operand after /path2
Try 'cp --help'  for more information.
0
 
libertyforall2Author Commented:
I tried to cd in path directory then using
cp `ls -rt --group-directories-first|tail -n1` /path2 

Open in new window

and got the same message. Also, this doesn't appear to differentiate between files within the directory. It should only look at files beginning with "stuff" and ignore eveything else.
0
 
pwustCommented:
you can retry to leave out this option --group-directories-first. Its existence depends on the actual shell version.

However, you should not have any subdirectories in your source dir that could have a newer modification time than your newest regular file.
0
 
libertyforall2Author Commented:
Still doesn't seem to work.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Simplify Active Directory Administration

Administration of Active Directory does not have to be hard.  Too often what should be a simple task is made more difficult than it needs to be.The solution?  Hyena from SystemTools Software.  With ease-of-use as well as powerful importing and bulk updating capabilities.

  • 4
  • 4
Tackle projects and never again get stuck behind a technical roadblock.
Join Now