Sponsored Content
Full Discussion: Copy file only if newer
Top Forums Shell Programming and Scripting Copy file only if newer Post 303024490 by Don Cragun on Tuesday 9th of October 2018 04:16:02 PM
Old 10-09-2018
Yes, the test utility operator -nt stands for newer than. If you check the man page for the test utility on your system or look for the term "conditional expression" on the man page for your shell, you'll find lots of useful tests that can be performed in your shell scripts. (Note that "conditional expression" might be all lowercase, all uppercase, or have the first letter of each word capitalized depending on which shell's man page you're reading.)

Most of the operators that are available with the [[ command (if your shell has a [[ command) are also available with the test utility invoked with:
Code:
test expression

or with:
Code:
[ expression ]

The test and [ utilities are available with all Bourne shell derived shells.
 

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

tar --newer = tar --newer-mtime ?

Hi, I have the following question : As far as I know unix doesn't store file creation dates. Would that imply the following? tar -cvzf backup.tar --newer is equal to: tar -cvzf backup.tar --newer-mtime ? (1 Reply)
Discussion started by: jamesbond
1 Replies

2. Shell Programming and Scripting

copy only newer files? (xcopy equivalent)

Howdy folks. I have a problem - I'm sure the answer is very simple, but I can't work it out. I want to create a UNIX shell script that does what I've been doing in DOS batch files for years - that is, backing up files. By which I mean copying files from a source directory to a target... (4 Replies)
Discussion started by: Chomps
4 Replies

3. Solaris

To copy the files newer than specific date

Dear all, Can you help me in copying files newer than speciifc date Thanks in advance, Rajesh (3 Replies)
Discussion started by: RAJESHKANNA
3 Replies

4. Shell Programming and Scripting

Copy newer files without create

I want the same effect as "cp -u" but without create missing files, it is possible ? ps: bash (2 Replies)
Discussion started by: mrxrsd
2 Replies

5. Shell Programming and Scripting

If condition to check one file newer than the other - first file name uncertain

Dear All, I'm new to unix scripting. I'm trying to write an utility script which has to check if one file is newer than another one. The condition is I dont know the full name of the first file. I searched google and this forum for any such examples, but couldn't find any or may be I would have... (9 Replies)
Discussion started by: achilles5
9 Replies

6. Shell Programming and Scripting

How to script to find the newer date in a text file?

Hi, I have a text file, foo.txt, it looks something like below. In the file there is a line that gives the date in the form of: Mon Jun 15 11:09:31 2008. I need to find which date is the newest and then store certain details of that list data to another file. So, in this sample text file, I... (6 Replies)
Discussion started by: boolean2222
6 Replies

7. Shell Programming and Scripting

how to find a file then overwrite with a newer version

This should be a simple script, but can't find one with google search. I just need to find the file that is in many directories, then overwrite that file with a newer version i.e. find file.jar then overwrite with /root/file.jar All I get in searches is substitute text with new test inside... (1 Reply)
Discussion started by: haircat
1 Replies

8. Shell Programming and Scripting

Perl script, replace file with newer file

Hello, Can you please help me one this: I have two servers: Server A and server B. Every day on 03.00AM in only one on these two servers (randomly)is generated one file, lets say file.txt. I want to copy this file also to the other server. I want to create a perl script that does... (2 Replies)
Discussion started by: arrals_vl
2 Replies

9. UNIX for Dummies Questions & Answers

If condition to check one file newer than the other

Dear All, I'm new to unix scripting. I'm trying to write an utility script which has to check if one file is newer than another one. $3 $4 $5 $6 are files .txt. Help me please. for i in $3 $4 $5 $6 do if then echo "$1 is newer than $i" else echo "$i is newer than $1" fi (9 Replies)
Discussion started by: Manueldo
9 Replies
ZIPARCHIVE.OPEN(3)							 1							ZIPARCHIVE.OPEN(3)

ZipArchive::open - Open a ZIP file archive

SYNOPSIS
mixed ZipArchive::open (string $filename, [int $flags]) DESCRIPTION
Opens a new zip archive for reading, writing or modifying. PARAMETERS
o $filename - The file name of the ZIP archive to open. o $flags - The mode to use to open the archive. o ZipArchive::OVERWRITE o ZipArchive::CREATE o ZipArchive::EXCL o ZipArchive::CHECKCONS RETURN VALUES
o $Error codes - Returns TRUE on success or the error code. o ZipArchive::ER_EXISTS File already exists. o ZipArchive::ER_INCONS Zip archive inconsistent. o ZipArchive::ER_INVAL Invalid argument. o ZipArchive::ER_MEMORY Malloc failure. o ZipArchive::ER_NOENT No such file. o ZipArchive::ER_NOZIP Not a zip archive. o ZipArchive::ER_OPEN Can't open file. o ZipArchive::ER_READ Read error. o ZipArchive::ER_SEEK Seek error. EXAMPLES
Example #1 Open and extract <?php $zip = new ZipArchive; $res = $zip->open('test.zip'); if ($res === TRUE) { echo 'ok'; $zip->extractTo('test'); $zip->close(); } else { echo 'failed, code:' . $res; } ?> Example #2 Create an archive <?php $zip = new ZipArchive; $res = $zip->open('test.zip', ZipArchive::CREATE); if ($res === TRUE) { $zip->addFromString('test.txt', 'file content goes here'); $zip->addFile('data.txt', 'entryname.txt'); $zip->close(); echo 'ok'; } else { echo 'failed'; } ?> PHP Documentation Group ZIPARCHIVE.OPEN(3)
All times are GMT -4. The time now is 04:17 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy