64

I need to upload a 400mb file to my web server, but I'm limited to 200mb uploads. My host suggested I use a spanned archive, which I've never done on Linux.

I created a test in its own folder, zipping up a PDF into test.zip.001, .002, and .003. How do I go about unzipping it? Do I need to join them first?

Please note that I'd be just as happy using 7z as I am using ZIP formats. If this makes any difference to the outcome.

  • This may not be helpful on a web server with limited software installed, but I haven't seen this solution anywhere else and it's what I use: The java.util.zip API has dealt with all the ZIP parts I've thrown at it, even in the more general case of not having trailing parts or the last part being incomplete. I call it from Jython so it's in the form of a script, and here is the code: github.com/combatopera/unzipparts – Andrzej Cichocki Feb 16 '13 at 22:29
67

You will need to join them first. You may use the common linux app, cat as in the example below:

cat test.zip* > ~/test.zip

This will concatenate all of your test.zip.001, test.zip.002, etc files into one larger, test.zip file. Once you have that single file, you may run unzip test.zip

"How to create, split, join and extract zip archives in Linux" may help.

  • 1
    OK, I like that... Progress... But I really am a Linux n00b here. I assume x* is the filename? And ~/hugefile is a directory? What is the purpose of the tilde symbol? Sorry to ask what I suspect are very basic questions. – Tim Jun 11 '12 at 2:54
  • when you split the files, you should use a prefix like x_ (ex: x_split1 , x_split2 , ... ; like the windows suffixes file.001, file.002...etc) the tilde represents your home directory. ~/hugefile is the same as /home/tim/hugefile. did you split your files ? what are the split files names? – fromnaboo Jun 11 '12 at 2:59
  • 1
    I think I see where the issue will come in, the Spanned archive was created in windows, using 7zip with a ZIP extension, so it auto creates as TEST.zip.001, TEST.zip.002 and TEST.zip.003 which means the split is very different. It's starting to look like it may be easier to thrown linux on a VMWare and create the files here, then at least i'm only dealing with 1 OS. Can you use the SPLIT command on ANY file type? i.e. images, audio movies etc? – Tim Jun 11 '12 at 3:03
  • yes, the split command works on any file. install p7zip with apt-get install p7zip on debian or yum install p7zip on fedora, join the files with: cat TEST.zip.* > archive and extract them with. – fromnaboo Jun 11 '12 at 3:05
  • 1
    7za x archive is probably better if the archive contains a directory structure. – slm Jan 25 '13 at 16:50
34

The Linux unzip utility doesn't really support multipart zips. From the manual:

Multi-part archives are not yet supported, except in conjunction with zip. (All parts must be concatenated together in order, and then zip -F (for zip 2.x) or zip -FF (for zip 3.x) must be performed on the concatenated archive in order to “fix” it. Also, zip 3.0 and later can combine multi-part (split) archives into a combined single- file archive using zip -s- inarchive -O outarchive. See the zip 3 manual page for more information.)

So you need to first concatenate the pieces, then repair the result. cat test.zip.* concatenates all the files called test.zip.* where the wildcard * stands for any sequence of characters; the files are enumerated in lexicographic order, which is the same as numerical order thanks to the leadings zeroes. >test.zip directs the output into the file test.zip.

cat test.zip.* >test.zip
zip -FF test.zip --out test-full.zip
unzip test-full.zip

If you created the pieces by directly splitting the zip file, as opposed to creating a multi-part zip with the official Pkzip utility, all you need to do is join the parts.

cat test.zip.* >test.zip
unzip test.zip
  • 1
    the 2nd command should be zip -FF test.zip --out test-full.zip -- will give you an error without the --out command – Alvin Aug 11 '12 at 4:49
  • 3
    For me, the FF approach worked if I pointed zip to the first multi-part file, no cat needed. – Jānis Elmeris Dec 28 '14 at 16:19
  • 1
    As @JānisElmeris already mentioned, no need to concatenate the archives before using zip -FF on them. – René Jan 5 '18 at 13:32
23
7z x archive.zip.001

It will automatically find the rest

  • That's so weird... For this to work, you first need to rename all ZIP files (.zXX and .zip) to .zip.xxx (.zip is the last part), then you can use 7z x on the first one, which "extracts" to a concatenated zip which can then again be decompressed using unzip but not 7z... I'm not entirely sure if the file has been unpacked correctly but at least this time unzip does not complan about CRC errors... ZIP is so incredibly broken on Linux - avoid if you can. :( – Energiequant Jun 13 '16 at 10:00
17

I found the answer here: https://superuser.com/a/517758/10264

This answer is similar in concept to that of Gilles, namely first you combine the split archive into a normal archive using split, and then you unpack it using unzip.

The difference is that instead of using the -FF flag, which did not work for me, you just tell zip to repack the split file without splitting. That is what the -s 0 flag means.

So, first, combine the split archive to a single archive:

zip -s 0 split-foo.zip --out unsplit-foo.zip

Then, extract the single archive using unzip:

unzip unsplit-foo.zip
  • 2
    This is the correct answer for zip 3.x – texasbruce Oct 19 '17 at 0:49
0

Just another example. This worked for me in bash to split 3GB oracle installer:

echo "<installOracleDB.sh>: Splitting OracleDB installer"
zip /tmp/linuxx64_12201_database.zip --out /tmp/linuxx64_12201_oradb.zip -s 1000m
echo "<installOracleDB.sh>: Merging OracleDB installer"
zip -FF /tmp/linuxx64_12201_oradb.zip --out /tmp/linuxx64_12201_database.zip
echo "<installOracleDB.sh>: Removing temporary files OracleDB installer"
find /tmp -type f -name 'linuxx64_12201_oradb*' -exec rm {} +
echo "<installOracleDB.sh>: Unizipping OracleDB installer"
unzip /tmp/linuxx64_12201_database.zip
  • This looks very similar to previous answers. Can you explain what it is doing, and how it differs from what’s already been posted? Please do not respond in comments; edit your answer to make it clearer and more complete. – Scott Nov 3 '17 at 18:19
  • Hi Scot, i wish i could answer in the comments but i have to little points to do that right now. This answer gives a complete list of commands to split, merge and unzip a large file on unix. I will provide more explaining text to clarify my answer. Thank you for your reply. – TheHagueCoder Nov 9 '17 at 9:55

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