Linux unzip unsupported compression method 99

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unzipコマンドで unsupported compression method 99 というエラー Linux コマンド unzipコマンドで以下のようなエラーが出てしまう場合 $ unzip foo.zip Archive: foo.zip skipping: foo.txt unsupported compression method 99 圧縮方式が対応していないらしいです。

493670 – Unsupported Compression Method 99

Description of problem: unzip fails to uncompress a zip file. #unzip foo.zip Archive: foo.zip skipping: bar.wmv unsupported compression method 99 # file foo.zip foo.zip: Zip archive data, at least v2.0 to extract My understanding is that, it is a password protected zip file created in Windows using PKZIP Version-Release number of selected component (if .

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[zipfs] Unsupported compression method used: 99 for record #2 — map/usa.mbd from ‘American Truck Simulator/mod/unhide rough roads v1.1 — by Lexx.scs’. 00:00:35.391 : [zipfs] Unsupported compression method used: 99 for record #3 — map/usa.set from ‘c:/ATS folder/American Truck Simulator/mod/unhide rough roads v1.1 — by .

Unsupported Compression Method 99 Linux FAQ

What is unsupported compression method 99 and how to fix it?

Why cant i unzip a 99 compressed file?

What causes file decompression failed in linux?

Is there a gnu standard library for compression?

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Extract an encrypted zip file through terminal

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Extract an encrypted zip file through terminal

Post by vvv511 » Fri Jan 03, 2020 10:17 am

I am trying to extract an encrypted zip file through terminal, which I already did before and should be something simple like this:

Archive: file.zip skipping: file.xls(this is the file inside the zip) unsupported compression method 99

Is this a problem with the file which is not supported by Linux or is the file broke? Appreciate any help.

Last edited by LockBot on Wed Dec 28, 2022 7:16 am, edited 1 time in total.
Reason: Topic automatically closed 6 months after creation. New replies are no longer allowed.

Re: Extract an encrypted zip file through terminal

Post by gm10 » Fri Jan 03, 2020 10:32 am

unzip only supports old zip formats, seems you compressed with an unsupported one. Mint comes preinstalled with 7zip, so try

Re: Extract an encrypted zip file through terminal

Post by vvv511 » Fri Jan 03, 2020 10:38 am

gm10 wrote: ⤴ Fri Jan 03, 2020 10:32 am unzip only supports old zip formats, seems you compressed with an unsupported one. Mint comes preinstalled with 7zip, so try

Re: Extract an encrypted zip file through terminal

Post by gm10 » Fri Jan 03, 2020 10:45 am

You’re welcome. It’s one of the downsides of Linux really, many commands that do the same things, in various states of disrepair.

Re: Extract an encrypted zip file through terminal

Post by missmoondog » Fri Jan 03, 2020 11:35 am

you could always just install the non free unrar and then use a gui to unzip files also. works on everything i’ve used it on.

will never figure out why anyone would want to have to type out all that just to do something so simple? yes, i guess i’m stuck in windows mode frame of mind!!

Re: Extract an encrypted zip file through terminal

Post by gm10 » Fri Jan 03, 2020 12:35 pm

missmoondog wrote: ⤴ Fri Jan 03, 2020 11:35 am will never figure out why anyone would want to have to type out all that just to do something so simple? yes, i guess i’m stuck in windows mode frame of mind!!

Various reasons, not the least of them being automation for tasks you do regularly. All Mint desktop environments should support opening encrypted .zip files via the GUI out of the box via their respective file managers.

Re: Extract an encrypted zip file through terminal

Post by vvv511 » Fri Jan 03, 2020 3:24 pm

missmoondog wrote: ⤴ Fri Jan 03, 2020 11:35 am you could always just install the non free unrar and then use a gui to unzip files also. works on everything i’ve used it on.

will never figure out why anyone would want to have to type out all that just to do something so simple? yes, i guess i’m stuck in windows mode frame of mind!!

I know I could just use Archive Manager(file-roller) which I believe could extract this file easily but I like to learn how to do these tasks through the terminal and I’ve uninstalled most of the programs that come with Mint precisely with that purpose, maybe I just like to complicate things.

Re: Extract an encrypted zip file through terminal

Post by missmoondog » Sat Jan 04, 2020 10:43 am

missmoondog wrote: ⤴ Fri Jan 03, 2020 11:35 am you could always just install the non free unrar and then use a gui to unzip files also. works on everything i’ve used it on.

will never figure out why anyone would want to have to type out all that just to do something so simple? yes, i guess i’m stuck in windows mode frame of mind!!

I know I could just use Archive Manager(file-roller) which I believe could extract this file easily but I like to learn how to do these tasks through the terminal and I’ve uninstalled most of the programs that come with Mint precisely with that purpose, maybe I just like to complicate things.

i’ve always heard it was inadvisable to uninstall the default programs that come with linux? oh well, to each his own.

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Use password compression problem #337

Use password compression problem #337

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The text was updated successfully, but these errors were encountered:

@jhudsonWA Mac windows, Android has not been tested

Ok, we need to look into this a bit more then. You are not the first person who have said a password protected zip does not work cross platform.

I am seeing a similar issue. Zip file is created on iOS, but cannot be unzipped on macOS.

user$ unzip /Users/user/Downloads/test.zip Archive: /Users/user/Downloads/test.zip skipping: test/file1.txt unsupported compression method 99 skipping: test/file2.txt unsupported compression method 99 skipping: test/file3.txt unsupported compression method 99 

The zip file works normally if a password is not set when creating the zip file.

Just for reference, unzip preinstalled in macOS don’t support the compression method, but others (ex. p7zip, The Unarchiver ) do.

@monoqlo do we know what compression methods with password are supported by /usr/bin/unzip ?

[edit]
I found the source code of /usr/bin/unzip , it’s from unzip60.zip (ftp://ftp.info-zip.org/pub/infozip/src/), released on 2009, April 25.

[edit]
And doc, which reports potential password encoding issues: http://www.info-zip.org/mans/unzip.html

Archives encrypted with 8-bit passwords (for example, passwords with accented European characters) may not be portable across systems and/or other archivers. This problem stems from the use of multiple encoding methods for such characters, including Latin-1 (ISO 8859-1) and OEM code page 850. DOS PKZIP 2.04g uses the OEM code page; Windows PKZIP 2.50 uses Latin-1 (and is therefore incompatible with DOS PKZIP); Info-ZIP uses the OEM code page on DOS, OS/2 and Win3.x ports but ISO coding (Latin-1 etc.) everywhere else; and Nico Mak’s WinZip 6.x does not allow 8-bit passwords at all. UnZip 5.3 (or newer) attempts to use the default character set first (e.g., Latin-1), followed by the alternate one (e.g., OEM code page) to test passwords. On EBCDIC systems, if both of these fail, EBCDIC encoding will be tested as a last resort. (EBCDIC is not tested on non-EBCDIC systems, because there are no known archivers that encrypt using EBCDIC encoding.) ISO character encodings other than Latin-1 are not supported. The new addition of (partially) Unicode (resp. UTF-8) support in UnZip 6.0 has not yet been adapted to the encryption password handling in unzip. On systems that use UTF-8 as native character encoding, unzip simply tries decryption with the native UTF-8 encoded password; the built-in attempts to check the password in translated encoding have not yet been adapted for UTF-8 support and will consequently fail.

At least, /usr/bin/unzip does officially support password decryption:

$ unzip -v
UnZip 6.00 of 20 April 2009, by Info-ZIP. Maintained by C. Spieler. Send
bug reports using http://www.info-zip.org/zip-bug.html; see README for details.

Latest sources and executables are at ftp://ftp.info-zip.org/pub/infozip/ ;
see ftp://ftp.info-zip.org/pub/infozip/UnZip.html for other sites.

Compiled with gcc 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.34) for Unix Mac OS X on Oct 14 2016.

UnZip special compilation options:
COPYRIGHT_CLEAN (PKZIP 0.9x unreducing method not supported)
SET_DIR_ATTRIB
SYMLINKS (symbolic links supported, if RTL and file system permit)
TIMESTAMP
UNIXBACKUP
USE_EF_UT_TIME
USE_UNSHRINK (PKZIP/Zip 1.x unshrinking method supported)
USE_DEFLATE64 (PKZIP 4.x Deflate64(tm) supported)
LARGE_FILE_SUPPORT (large files over 2 GiB supported)
ZIP64_SUPPORT (archives using Zip64 for large files supported)
VMS_TEXT_CONV
[decryption, version 2.11 of 05 Jan 2007]

UnZip and ZipInfo environment options:
UNZIP: [none]
UNZIPOPT: [none]
ZIPINFO: [none]
ZIPINFOOPT: [none]

note: I’m on macOS Sierra on a Mac OS Extended (Journaled) partition; I am not yet using the new High Sierra with Apple File System (APFS).

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