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

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11
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4answers
18k views

add password to existing zip file with 7zip

Is it possible to add a password to an existing zipfile with 7zip without going to all the trouble of unpacking it and re-packing it again?
0
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0answers
135 views

How to modify files within mszip (cab) executable?

I can list and extract certain executable contents using 7z. It seems to be using standard compression methods. Path = test.exe Type = Cab Method = MSZip How can I modify files inside that ...
4
votes
4answers
5k views

Recursively unzip files where they reside, then delete the archives

I goofed up a setting on the backup software I use. Normally I would have the files from a network share get loaded into a spare drive, compressed into zip folders, then sent off to the offsite hub. ...
2
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2answers
2k views

Convert .tar.gz/.tar.bz2 to .7z in batch?

How do I convert .tar.gz and .tar.bz2 files to .7z files using the command line?
1
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0answers
75 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 ...
18
votes
5answers
36k views

Missing Explorer menu options for 7-Zip

Just reinstalling 7-Zip (v.9.2) to a new system, and I cannot find the context-menu option in Explorer. In the 7-Zip options there is no plugins tab (as detailed in the documentation) to change this ...
0
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0answers
53 views

Linux equivalent settings for 7zip

I'd like to use the same settings as below (Win7) on Linux to compress files, but I fail to get equal compression results, for which I blame myself not correctly using 7za. So far, I have 7za a ...
11
votes
8answers
42k views

How do I reassemble a zip file that has been emailed in multiple parts?

I received 3 emails each containing part of a zip file. The extensions end in .z00, .z01 and .z02. (Emailed as such to get around the typical 10Mb attachment limit per email.) I have put all 3 files ...
2
votes
4answers
236 views

What other archive formats save Date Created and Date Accessed?

7-Zip on Windows will save the Date Created and Date Accessed when compressing a .zip file, however it does not do this for its (referring to 7-Zip) native .7z format. Any Unix-based formats are ...
7
votes
3answers
10k views

What does the percent sign (% and %%) in a batch file argument mean?

I think I'm missing something because I can't seem to find what this means. Example: for /D %%A in (*) do "\7za.exe" u -t7z -m9=LZMA2 "%%A.7z" "%%A" That line was supposed to use a command line ...
3
votes
1answer
7k views

Extract and overwrite existing files

I am trying to write a batch script to extract files out of an existing zip file, into another folder on my desktop and to have the system not prompt me as to whether I want to overwrite the existing ...
0
votes
2answers
381 views

how to disable 7 zip from opening normal applications folders and files?

So I've been having trouble with my 7 zip on windows xp. I don't know what i did, but suddenly all of my normal folders,applications and files have started opening in 7 zip,even though their not ...
0
votes
1answer
214 views

Extract Java7u60 Server on Windows

I've downloaded the file server-jre-7u60-windows-x64.tar.gz from http://www.oracle.com/technetwork/java/javase/downloads/server-jre7-downloads-1931105.html and am trying to extract it with 7Zip. I ...
9
votes
4answers
15k views

Best Secure Encryption for Zip Files via Linux

I want to use highly secure encryption for zipped files via Linux/Ubuntu using a command line terminal, what is the best command line tool to get this job done? zip -e -P PASSWORD file1 file2 file3 ...
4
votes
3answers
287 views

Extract large archive with 7-zip

I have a 76 GB disk image that's split in 28 files (Foo.7z.001 to Foo.7z.028) in "Storage" format and I want to extract it into my D: drive (which has 523 GB available). I've tried all 7-Zip settings: ...
0
votes
5answers
6k views

How can I overwrite an existing file in 7zip?

I'm trying this: 7za.exe a "C:\Disc.7z" "C:\test" -v20000000b -m0=BCJ -bd But if I already have created the file C:\Disc.7z then 7zip doesn't compress anything and sends me this output: System ...
1
vote
1answer
890 views

All of my executables are trying to open via 7zip. How can I put them back to normal? [duplicate]

Possible Duplicate: How do you associate the .exe file extension with a program in Windows? I recently booted my computer and all of the executable files have turned into 7zip icons. A ...
0
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0answers
29 views

Fixing the 7-zip COM surrogate issue?

My favorite archiver 7zip is unable to open the pictures in Windows Picture Viewer. The creator Igor Pavlov Says: The Program1 (some photo file handler) calls another Program2 (windows photo viewer) ...
1
vote
1answer
53 views

7z from bash script won't exclude directories

I've encountered with kinda strange behaviour of 7z (or bash, I don't know yet.). With the following script: #!/bin/bash find /home/user -type f -name "*.pdf" | cut -c 10- > ...
1
vote
1answer
326 views

zip file (with spaces in the files name) to unzip and rename files and zip back

I'm trying to rename the contents of a zip file to match the name of the zip file with a batch file. This is exactly what I'm trying to do : ...
0
votes
0answers
315 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 ...
0
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0answers
199 views

Extract and delete all zip and rar files in subfolders + rename if files in archive have same name

i have few thousands rar and zip files in folders and subfolders. I want to extract them, and if there are the same filenames, for example: dir1 -subdir1 archive.zip ...
1
vote
2answers
103 views

7-zip extras for Linux

I want to pack a folder containing various resources and executables into a single self-extracting file and execute a command after that, "setup.exe" for example. I've successfully accomplished that ...
2
votes
1answer
6k views

Identifiying a zip file that is not really a zip file

I have several files that a 3rd party program generated that have a .zip extension, however neither windows nor 7zip can extract it. In 7zip it does show me the file name of the uncompressed file ...
12
votes
3answers
42k views

What settings to use when making 7zip files in order to get maximum compression when compressing PDFs?

What settings to use when making 7zip files in order to get maximum compression? I'm compressing PDF documents containing scanned images. I'm thinking about using LZMA2, but I don't know what to set ...
1
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3answers
1k views

“can't find specified sfx module” when trying to create self extracting file with 7zip

I am trying to create a self extracting file for Windows from Ubuntu 10.04 using 7zip. I tried these commands: 7zr -sfx7z.sfx a output.exe *.txt 7zr -sfx/usr/local/etc/7z.sfx a output.exe *.txt ...
1
vote
1answer
6k views

How to extract all zip files in subfolders using 7-zip in Windows 7

I have a large Windows 7 folder tree structure containing many zip files. These are single layer zip files (not zip within zip). What 7-zip command can I use to parse through this folder structure, ...
6
votes
2answers
9k views

Extract a certain file from an archive with 7-Zip from the command line

If I have an archive, for example, some.zip that contains one or more files, how can I extract only one file (I know the name of the file) with 7-Zip from the command line in Windows?
1
vote
2answers
2k views

7zip: Add files to new folder in archive via command line?

I am using 7zip for compressing a bunch of files. The files are in a directory structure, like this: MyDir\File1 MyDir\File2 MyDir\File3 MyDir\MoreFiles\File4 MyDir\MoreFiles\File5 I want to ...
52
votes
4answers
153k views

How to split large file on Windows?

Is there a tool to split large text file (9Gb) into smaller files so that I can open it and look through? Anything usable from command line that comes with Windows (XP)? Or what's the best way to ...
0
votes
1answer
702 views

How do I zip a folder with 7-zip but not subfolders of that folder?

For instance, if I wanted to zip everything in My Documents, but not subfolders in My Documents, and I also did not know the name of each subfolder.
6
votes
2answers
7k views

7 zip extract recursively

I have several folders, and within each folder, there are zip files. I want to run a command line order to recursively go through every folder and extract in place every archived file that it finds, ...
1
vote
2answers
5k views

How do I create seperate 7z files from each selected directory with 7zip command line?

FOR %i IN (*.*) DO 7z.exe a "%~ni.7z" "%i" Does the job for each selected file. However I've got tons of directories (with files inside them obviously) I need to pack. Say I have d:\dir1, d:\dir2, ...
7
votes
2answers
714 views

What does combining compression methods in 7z actually do?

The 7z command-line tool lets you specify multiple compression methods, e.g.: # 7-zip archive type, strongest (9) compression, methods PPMd, BCJ2, LZMA2 $ 7z a -t7z -mx=9 -m0=PPMd -m1=BCJ2 -m2=LZMA2 ...
1
vote
1answer
110 views

Compress / Zip a folder periodically but use minimal CPU?

Similar to this question except, I need it to run with minimal CPU on the background? Also, if there's a 7zip solution that will be nice.
5
votes
2answers
2k views

If I compress a file in a .7z archive with password, is it undecryptable without password?

I'm just curious to know whether or not an encrypted file is really save in terms of decrypting if I compress (or just save) a file into a .7z archive with a password. If I use a strong and ...
0
votes
0answers
118 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.
-1
votes
1answer
189 views

What 7zip settings to compress very large partition image?

I have 77 GB big partition backup image in single file and I'd like to compress it quickly. It should compress very well even on worst settings, but choosing GZIP with "Fastest" setting takes about ~1 ...
0
votes
1answer
195 views

Can decompress RAR files with 7z.exe command line?

Can extract RAR files from the terminal with 7z.exe? Thanks! This lines doesn´t works on a Extract.bat file. 7z.exe X Xbox.rar -o
1
vote
1answer
171 views

How to unzip a zip file to a folder but avoid duplicate folders?

I think you all know that: you're getting a zip file and you don't know whether it contains all files in a folder or only the files. In order to not get a messed up directory, I never use "Extract ...
34
votes
5answers
5k views

Why is a 7zipped file larger than the raw file? [duplicate]

Possible Duplicate: Why doesn't ZIP Compression compress anything? I tried 7zipping an .exe file but it actually became larger. Is this the expected result?
11
votes
3answers
5k views

How to disable the output of 7-Zip?

I use 7-Zip to compress files inside a batch file like this: ...\right_path\7z a output_file_name.zip file_to_be_compressed I got the following output: 7-Zip 4.65 Copyright (c) 1999-2009 Igor ...
3
votes
2answers
6k views

Extracting .exe executables and back again using 7-Zip?

I figured out, by accident, that I can extract .exe executables (what for?). Though the files make no sense whatsoever, how do I put those extracted files back into an .exe executable?
0
votes
1answer
3k views

Unpack NSIS executable

I am trying to decompress a NSIS executable. With the GUI version of 7zip I am able to do this and the exe is listed as: Type = Nsis Method = LZMA:25 Solid = + With the command line version 7za I ...
1
vote
0answers
40 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 ...
0
votes
2answers
583 views

How can I achieve the maximum zip compression? [closed]

I would like to make a "standard" zip file which contain .jpg images. Which software and switches / options should I use to achieve the maximum compression ratio? I mean maybe I can make a solid ...
34
votes
4answers
17k views

What is the reason for 7-zip / WinRAR to first unzip files to “temp” and then move them to destination?

What is the reason for 7-zip / WinRAR to first unzip files to "temp" and then move them to destination? I do not see any advantage against just directly unzipping to destination. It is really ...
7
votes
3answers
20k views

How do I create separate zip files for each selected file/directory in 7zip?

This is the internal zip packer from Total Commander: However I want to use my 7zip packer. When I select 5 files, I get 5 separate .zip archives for each selected file. How do I do that in 7zip?
2
votes
2answers
1k views

Creating .xz with 7-Zip, claims insufficient memory (not true)

In WinXP 32bit with a Core i5 (dual core) and 4GB RAM, I'm trying to create an .xz archive from a 266MB log file using 7-Zip (GUI) on the "ultra" compression level (method: LZMA2, dictionary size: ...
0
votes
1answer
1k views

7z in batch file with variables “Incorrect command line”

I'm trying to run the following batch file: set HH=%time:~0,2% set HH=%HH: =0% IF %time:~0,2% GTR 5 ( IF %time:~0,2% LSS 21 ( FOR /F "TOKENS=1 DELIMS=:" %%A IN ('TIME/T') DO SET HH=%%A XCOPY ...