7-Zip is an open source file compression and archiving application

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Extracting an archive with millions of files with 7z is very slow

I have an archive with ~2 millions files, each of them being a few KB when uncompressed. The extraction is extremely slow (1 or 2 files per second). I see that 7z uses 100% of one CPU core. Is it ...
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239 views

Possible bug in 7zip - empty folders extract as empty files

I have a directory structure as follows: Main | |--empty_folder | |--folder | |--example.txt I'm zipping it using the .NET ZipFile.CreateFromDirectory method (but I doubt this has anything to ...
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78 views

Is it possible to make 7-Zip also extract all the other files when double clicking an exe?

With Winrar, when I double click an exe file in an archive, it also extracts all the other files in the archive, which is really handy for when the program depends on the other included files. I want ...
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787 views

Can you fix a corrupted 7z file?

So, I had a cd, with a scratch on it. The cd contained a 7z file. When I try to copy the file it gave me an error, so I used corrupted disk repair fixer and I managed to open the 7z, and view the ...
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882 views

Command line switching

I have read through some suggestions but I am just not technical enough to get this I think. I am a CAD designer and each file has 5 files associated with it. I have 3 sets of 5 files, and each set ...
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8 views

Looking for command line values for an older (9.22 beta) 7zip

Better yet, is there a help file for the older 7zip utility? I want to test some PW recovery tools (build encrypted zip w/ known PW). This is probably trivial but starting from a 7zip.exe that has ...
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32 views

Edge and Chrome Changing Downloaded File Extention

I'm downloading a file with the .lzp extension that both Chrome and Edge are changing it to .zip. It does appear to be a zip file just with a new extension. But the program that I'm using it for, the ...
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143 views

Creating 7zip SFX installer

I'm trying to create self extracting archive with gui, I'm using 7-Zip 9.20 on Windows 10, I just want the files in the 7z file to extract to the InstallPath directory, without running the file. I ...
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62 views

7-Zip: Empty tar file created

Using 7-Zip portable i created a tar file containing a folder which also contains numerous files and folders (200mb+). When i open the tar file it is empty, but the size of the tar file is exactly ...
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203 views

How to untar file with UTF-8 special characters in Windows

I want extract a TAR file with special characters UTF-8 and when open it with WinRAR and PeaZip show filename like mark question and when extract it with WinRAR and 7-Zip file name change to ...
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111 views

Incremental backups with 7-zip

I am trying to set up an incremental backup with 7-zip after finding zip might not suit my needs fully/easily. My data is located in /media/Data/Work. For some reason it is not liking my code. I've ...
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83 views

Uncompress recursively using 7-Zip from command line

I'm attempting to uncompress several .gz files using 7-Zip from the command line. My files are in directories like so: Desktop/copyto/1/ file1.gz file2.gz Desktop/copyto/2/ file1.gz ...
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89 views

7zip only asks me for a password once when I open an encrypted file

I archived some files on my laptop and encrypted them using 7zip and the first time I tried to open a file, it asks for the password, but after that it never asks for a password... is there a way to ...
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329 views

Windows .bat script to recursively archive (with 7zip) files in subfolders

I'm struggling to achieve the following DIR1 FileA FileB SUBDIR2 --->FileC --->FileD --->SUBDIR3 ------>FileE ------>FileF etc and end up ...
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225 views

7-Zip: Opening image from 7z archive produces error code 0x8000000a

I've tried encrypting a folder containing a text file and an image with AES encryption using the .7z format. When I enter the password to open the encrypted folder the two files are displayed. I can ...
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104 views

7zip on command line: can I use both include and exclude switches?

Here's my directory structure (in Windows 8.1): parentdir\ child1\ child2\ grandchild1\ grandchild2\ grandchild3\ ... child3\ child4\ ... Using 7-...
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46 views

Possible to make a switchless install from a password protected archive?

I am using 7-zip to make a switchless install (method for doing so here and here). I would like to use a password protected archive to make said install to help prevent the average user from simply ...
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264 views

How can I create a self-extracting executable from the windows command line that accepts the default install directory as a parameter?

I have tried several different methods including winzip command line and 7zip, but I cannot find a method that will let me create a self-extracting executable that will extract to a specific directory ...
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712 views

7zip command line - extract all files in a folder except *.exe

I am using the command: 7z.exe x -y -o<dir> <archive dir> * -aoa -r to extract all archives that are located in the archive directory. I am running into a problem where exe files that ...
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746 views

p7zip installs, but doesn't install? (7za: command not found)

I've uploaded it to /usr/local and used ./install.sh with ssh. I get the following: - installing /usr/local/man/man1/7z.1 - installing /usr/local/man/man1/7za.1 - installing /usr/local/man/man1/7zr.1 ...
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140 views

How would i make 7zip take a folder + subdirectories and individualy zip to bzip format each file in each sub directory

I want to know how to make 7zip take a folder + subdirectories and individualy zip to bzip format each file in each sub directory. if there is not a way then oh well.
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2k views

'No such interface supported' when attempting to compress file through 7zip commandline

When I run the 7zip commandline: > echo foo | 7za a arc.7z -sifoo.txt Everything works as expected, but if I try to do: echo foo | 7za a arc.zip -sifoo.txt I get the following: E:\7zip>...
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195 views

How to make a split archive for DVD storage where single files are extracted from the set without needing all the DVD's

I'm getting ready to 7z/rar/whatever 1125 files (About 300GB) into a split archive with each piece being 4,700,372,992 bytes. The idea is that I can put each split onto a DVD+R that will fill the DVD ...
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33 views

Issue with 7zS.sfx/7zSD.sfx

I'm trying to create my own installer. I have my file "7zSD.sfx (incorporated" in "lzma1600.7z" - Also try it with the "7zS.sfx" file incorporated in 7z920_extra.7z.), Config.txt and File.7z. My "...
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29 views

What version of tar does 7-zip use?

Does anyone know what version of tar 7zip uses for archiving/extracting? Is it gnu tar or bsd tar... or something else? I've googled around for an answer but can't find anything.
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49 views

Command Line to “batch” unrar many Archives into Subfolders accordingly

in Windows 10, i have an folder F:\archive with about 300 different "File 1.rar" "Otherfilename 307.rar" Knowing Linux better then Windows I spend some time to compile the following command and it ...
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63 views

how to extract .exe files from .zip archive (7-zip stuck on executable)

I face a problem that when I want to extract some .zip archive which includes .exe it will always stuck on that executable and do nothing. I never had such problems before, i can't remember at least. ...
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17 views

7zip File Compression Auto-Selection

When I'm zipping a folder hierarchy, I'd like 7zip to automatically detect whether a file in the folder tree is or is not already compressed, so that it automatically chooses whether to merely add an (...
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25 views

7-zip defaults to 7z extension - win 7 has no icon for this extension

I would either like to: a) set the win 7 zip folder icon as a default for the .7z extension OR b) set the 7-zip default extension to zip instead of .7z Win 7 pro SP1 (64b) 7-zip 15.14 (64b)
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17 views

Using 7-Zip for peer-to-peer LAN backups, good or bad idea?

Context: A couple of computers have a few gigabytes of documents to back-up. Most of the hard drive is empty. I want to use 7-Zip to create password protected archives and distribute it among the ...
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26 views

7zip is creating solid .zip files. Cannot add/remove/overwrite to .zip files ad-hoc

I'm using 7zip as an archive creation tool. .7z files may be created as solid or nonsolid files. .zip files are supposed to be inherently nonsolid. I have ~5GB of hierarchal folder/file structure ...
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33 views

How do I fix 7-Zip's default localization for its shell integration?

7-Zip installed itself in my native language. I managed to change the language of the 7-Zip program via its UI, but its shell integration is still in my native language. Is there any way I can ...
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47 views

How does “Word Size” affect compression?

In 7 Zip when adding a folder to an archive there is the option to change the Word Size. How does this word size affect compression, in particular the final size of the zip? I noticed that changing ...
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549 views

7zip: “There are data after end of archive”

When testing an archive file, I got this error: What does this mean, and does that implied that some parts of the archive file cannot be extracted? I use 7z 9.22 beta on Windows 7 SP1 x64 Ultimate....
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25 views

Archive differently named folders with 7zip in batch file

I want to write a batch file that will use 7zip to archive folders with certain names. The names will be different each time the batch file is run because the dates change. YYYY-MM-DD will represent ...
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153 views

sfx 7zip Module change extract path

I have been attempting to change the default extract location of the sfx module in 7zip. Below is my config file: ;!@Install@!UTF-8! InstallPath="C:\\TEST" RunProgram="test.bat" ;!@InstallEnd@! ...
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92 views

7z cannot open output file, running as root

I am running a computer on Debian. I am trying to extract a .wim onto a usb, but some of the files are not copying with an "Cannot open file" error. Some of the files are copying without an error. 7z ...
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56 views

Unable to extract prebuilt virtualbox with Windows 8

I went to this site, http://dev.modern.ie/tools/vms/windows/ to download prebuilt Virtual Box, with IE 10, Windows 8. The instructions say extract with 7-zip. When I try to extract, it asks for ...
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53 views

How to change context menu option for 7zip?

I work a lot with .gzip format and I am wondering if there is a way to change the default "Add to" format in the context from .zip to .gzip.
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706 views

Unzip .gz file in windows batch script using 7zip

I have 7 zip installed on windows machine. I have to extract .gz files into .txt files. I am not able to find a suitable command to do that. I tried below : 7za e %SFTP_INDIR%\DFUView.20150531060116....
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301 views

how unpack rar file?

i try unpack rar file: http://fias.nalog.ru/Public/Downloads/20150309/fias_dbf.rar (4+ gb), but get errors from every methods. i try unpack with unrar-free package, my command: unrar-free x ...
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1k views

How to unpack rar archive with p7zip under Centos 7

I'd like to make my 7z command to be able to extract RAR archives. I have installed p7zip and p7zip-plugins packages from EPEL repository. However, if I try to extract a rar file like this: 7z x ...
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356 views

Why does Firefox keep trying to download 7zip_14396_stf.exe and setup_tsv48ouvr.exe

When I start Firefox for the first time, two files try to download, but their download fails. I have searched to find out what these files are. The "7zip" file is from safe downloads, and it looks ...
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275 views

Have a self extract archive extract to specific folder

How can I create a self extracting archive that will extract the contents into a specific folder? Any program or method is acceptable on windows.
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271 views

Can't extract really long file name with 7-zip

I have scoured this page which seems to be the only info I can find on extracting really long file names. Although the examples in this page deal with compressing, I would think the same principles ...
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183 views

Command line extracting specified file from 7-Zip file

I would like to extract a specific file from a 7-Zip (.7z) file, but that filename exist twice on different directories. How can I choose one of them? I tried using a compressed path, but I received ...
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300 views

How I can identify the packer which was used for creation of some crapware installer bundles (setup.exe)

A lot of so called "freeware" bundle installers contains one or more unwanted disgusting crapware components like the evil ask toolbar or other similar hexadecimal stuff. Is it possible to identify ...
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380 views

Is it possible to recover partial compressed files?

Of the most popular compression methods (7z, RAR, Zip, GZip) is there any of them that allows to retrieve the uncompressed data from a partial file? Imagine there is only one compressed file, and it ...
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1k views

How to fix 7z.tmp file created in Windows xp?

I created large .7z.tmp file without noticing the .tmp extension. Now I can't open it to salvage the files which were not kept elsewhere. I have seen code by Igore that looks like it fits this problem ...
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28 views

How to create a.bat file to unzip multiple .7Z files?

I try to create a .bat file to extract (unzip) multiple 7Z files, each to separate folder, with the folder name equal to the name of the 7z file: file1.7z ---> in the directory file1 ...