Questions tagged [7z]
7z is a compressed archive file format. It's also an application that handles multiple compression formats.
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How does 7z implement AES encryption?
Questions:
Which AES algorithm mode is used in 7z? (Is it ECB, CBC, CFB, OFB, or CTR?)
When executing the command 7z a ArchiveName SomeDir -p, how does 7z perform encryption? Does it treat all data ...
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How to test if a file may be an archive on Linux
Context
I want to (try) unpack an MSI, Zip (or any archive), or EXE to inspect the contents.
I also want to recursively try unpack all extracted files.
Using 7zip, I have found I can unpack MSI, Zip, ...
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Why is 7-zip much faster than other LZMA implementations in Linux?
Until now, I used to backup my data using tar with one of the LZMA compression options (--lzma, --xz or --lzip)
I recently noticed that 7-Zip has been ported to Linux in 2021 (https://www.xda-...
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Add files from "bash find" to 7z archive
I did quite a bit of searching before asking this! (Even so I'm expecting to have a duplicate pointed out).
So I collect a bunch of files, e.g.:
find . -name "2020-*"
... is there some way ...
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How can I multithreadedly extract several 7z archives into their own folder, using the archive name as the folder name?
To extract all 7z archives into their own folder, using the archive name as the folder name, I run the command:
7z x "*.7z" -o*
E.g., if one has the two files a.7z and b.7z, then folders a ...
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Create archive under Debian right click menu does not allow password protection
When trying to create an archive with Debian GUI using Create archive... from right-click menu and Create a new archive window, is there an option to assign a password to 7z archive?
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Checking whether all files were extracted correctly
I have a bunch of large zip files on a Synology. The Synology built-in extractor is a bit fiddly, and I'd like to check whether the files were extracted correctly using the commandline. Installed is ...
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grep text only from files less than x size inside 7z
I have a 7z file that contains binary data and both large (>1Mb) and small (<1Mb) XML files.
I want to find only the small XML files that contain a specific string. I've tried using zgrep, but ...
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Convert tar to 7z directly?
I have a couple tarballs that are many gigabytes large and contain several thousand files and am wondering if it is possible to convert these to more versatile 7z archives, because the current ...
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Compress Zip to 7zip
I would like a shell (or other terminal based) script to convert zip files to 7z format.
Some zip files contain folders with more zip files in them. This needs to work recursively since there are zip ...
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7z An Existing Tar File
I am on ubuntu 20.04 and I have a 71GB.tar file that I would like to 7zip before moving it to long-term storage.
I can create a new directory.tar.7z using:
#tar cf - directory | 7z a -si directory.tar....
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Write 7z Log During Archive Creation
Situation:
I get daily backups of my vps onto an external hard disk and I create daily "snapshots" using rsyncd into folders named via the date function.
Then I use 7z immediately following ...
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Recompress 7z archives to tar.zst on the fly
I have a bunch of 7z archives (containing directories and files) that I would like to recompress as tar.zst (which offers much better decompression speeds if / when I need to unarchive them).
I could ...
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Why 7z not using enough CPU?
CentOS 9. 3 vCPU VM with 4Gb RAM.
I run a cron job with 7z compressing 35Gb data in 150 files 7za a -mx=9 -mmt=3 ...
RAM usage - 18%, disk queue is very small, CPU is 61% on average. Why not 100% ? ...
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Alternatives to compressed tarballs
I am reading/writing data from/to tapes using Debian and recently ran into an issue where I needed to figure out the size of the stored data stream, i.e. the data actually written to the tape (see ...
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unrar multiple files wity multiple files
I have 1000s of rar files and list of password in txt. i want to unrar all those files trying all passwords.
Tried:
for file in "$(ls *.rar)"; do for f in "$(cat pass.txt)"; do ...
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7-zip extraction using multiple cores?
I have stuff.7z.001 to stuff.7z.007. They are big.
Is there a way to 7z x in Linux to take advantage of multiple cores and speed things up?
also, how does one run the 7-zip gui in rhel/centos 7 ? I ...
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Difference between two tar commands -cf and -Jchf
I have a python script that is running in two places, two different, but similar commands:
os.system("tar cf - -C %s . 2>/dev/null 3>/dev/null | 7za a -p%s -si %s 1>/dev/null 2>/dev/...
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External extractor '7z' error when extract F/W image use Binwalk
Got error when tried to extract compressed F/W image use Binwalk 2.3.3:
WARNING: Extractor.execute failed to run external extractor '7z e -y '%e'': 'module' object has no attribute 'DEVNULL', '7z e -y ...
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7z command to create a XZ file
The man page says 7z tool supports 7z, LZMA2, XZ, ZIP, Zip64, CAB, RAR, ARJ, GZIP, BZIP2, TAR, CPIO, RPM, ISO, most filesystem images and DEB formats.
And it says we could pass the type as -t{Type}. ...
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How to create ".img" from files
I'm trying to alter some files inside an ".img" file.
Example:
logo-x.squashfs.img
romfs-x.squashfs.img
safeEnv.img
sign.img
For that, I extracted the ".img" using 7-Zip and made ...
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Need help with 7z command
I have a file called BaseSystem.dmg which contains a hfs+ system image as well as other files. I am trying to extract just the hfs+ system image file using 7z from the p7zip-full package.
I have tried ...
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Why can't I uncompress a huge file without going out of memory in Linux while Windows can?
I do have a 36GB .zip file to uncompress, which while being extracted will end up freezing the PC because of going oom (out of memory) with file-roller and the unzip command in a freshly installed ...
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Avoid to fully rewite a 7z file (10 GB) when updating a few files in it
Following the method explained in Incremental backup with 7zip, I can create an archive of 10 GB of documents with
7z u -up0q3r2x2y2z1w2 -mx=0 -p -mhe=on backup.7z /path/to/documents
It's encrypted (...
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What archival method (tar, zip, 7z, etc) allows me to retain folder modification dates on macOS?
I currently have a directory in a hard drive, say TopFolder which contains 3 subfolders, Folder1, Folder2, and Folder3.
When I am in the top level directory of the hard drive, and do:
tar cf TopFolder....
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Preserve file permissions and symlinks in archive with 7-Zip
I have a directory test with three files, ls -l test:
total 8
-rw-r--r-- 1 mb mb 16 Jul 25 11:12 regular_file
-rwxr-xr-x 1 mb mb 19 Jul 25 11:02 script.sh
lrwxrwxrwx 1 mb mb 12 Jul 25 11:14 symlink -&...
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GNU parallel + gunzip (or 7z, or bsdtar, or unzip): extract every "archivename.zip" into (to-be-created) its "archivename" subfolder
As in title. I've got a lot of ZIP archives that I want to extract.
All archives have their own unique name.
All archives contain files only (inside archives there are NOT folder(s) at all: no ...
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How to get file names in archive with 7z
Using 7z, I'd like to print the names of the files inside an archive.
The output of 7z l myArchive.7z is
7-Zip [64] 16.02 : Copyright (c) 1999-2016 Igor Pavlov : 2016-05-21
p7zip Version 16.02 (...
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Unable to open 7z-Archive: Open ERROR: Can not open the file as [7z] archive
I'm trying to open a 7z-File which I've packed with my phone using the ZArchiver app. Probably the process was interrupted and some files have gone missing, but that's not a huge problem.
Ark and ...
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7zip client: Compress dirs with method PPMd & compression level Ultra
So today, I am trying to compress multiple folders, of old photos which I want to backup.
I've found this article, that says method PPMd, and compression level Ultra, are far better for image ...
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Create archive (tar.gz, ...) from file given via stdin
I would like to automatically create a compressed archive from a file given via stdin (or create the archive, if it doesn't exist yet), while specifying the file name that it's going to have inside ...
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Batch 7zip all files separately in a directory (Centos 7.6)
I am trying to 7zip all files inside a directory separately into their own archive (for each file) in Linux Centos 7.6. Been looking around for a while but never found a method.
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How to obtain only fully decompressed files in destination folder when decompressing zipped file?
I'm trying to decompress a big zip file containing more that a hundred files, 128 MB each. When the decompression is interrupted, I have to delete the last file that was being decompressed, and ...
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7zip archive extraction fails [closed]
I'm going to use bigfile, smallfile1, and smallfile2 to always refer to the same file names without file extension. The two small ones don't have any.
I created an encrypted 7zip archive using this ...
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How to split a compressed file?
I have a 44GB 7z compressed file that I compressed with lzma2 and it took around 11 hours (original file is a text file of 285GB).
7z a -t7z Files.7z -m0=lzma2 -mx=9 -aoa
So, what I want is to do is ...
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Extracting a specific file from an archive using 7-Zip
I run Linux Live CD and I need to extract a specific file from a wim-archive that is located on a disk drive. I know a full path to the file in the archive:
xubuntu@xubuntu:~$ 7z l winRE.wim | grep -...
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Create separate 7z archives for each directory in the current directory and additionally parallelize through GNU Parallel
I have about two hundred sub-directories located within a directory of interest:
$ ls backup
201302
201607
201608
201609
201610
201701
201702
201705
201801
201802
I want to create a 7z archive xyz....
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How can I combine multiple 7z archives into one?
I'm trying to make a bash script that takes a large number of 7z archives and combines them into one archive. Here's what I have so far.
#!/bin/bash
DUMPPATH="/home/backups/dumps/"
NEWPATH=$DUMPPATH"...
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Check if file is an archive; if yes, extract
How can I check if a file is an archive and then extract it with 7z? I understand that I could check it by file command but it won't work in scripts because of its output. I can't predict what type of ...
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extract multipart 7z files in centOS terminal
How do I extract multipart 7z files (doc.7z.001, doc.7z.002...., doc.7z.060) in centOS terminal? I tried concatenating all the parts to a single file using this command below,
cat doc.7z* > ./docs....
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bash script: a more elegant way to perform these operations:
I have these three files:
file.txt.7z = 5.4GB
file-1.txt.7z = 251M
file-2.txt.7z = 7.7M
And they are the only files in a directory:
$ tree
.
├── file.txt.7z
├── file-1.txt.7z
└── file-2.txt.7z
I ...
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How to overwrite content in a 7z archive created from a pipe?
Purpose
I'm creating a function that dumps a database table to a compressed 7z file. The output of mysqldump is piped to 7zr with the -si switch. There should always be one file and one file only in ...
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Creating a checksum of a 7zip archive being created from a tar file being created
I want to solve a problem (which you can read about here as I don't feel like this should be part of the question).
So this is what I came up with:
$ tar -cO Templates | 7z a -si -mx=3 -p /t/out.tar....
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Encrypt file list when creating 7zip archive on command line
When creating a 7zip archive with file-roller, there is a checkbox labeled "Encrypt the file list too". And it seems to work as you cannot see the file list when opening an archive created with this ...
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Create a 7z archive without compression using Ark
I'm using KDE on Debian Stretch, and Ark is installed by default (version 16.08.3). I find it really convenient and easy to use. However, I cannot find a way to create a 7-zip archive without ...
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How can I repack zip to 7zip?
How can I safely and quickly repack a zip archive to a 7zip archive?
I checked options of 7zip program but I don't see any option to repack. I know I can extract to directory and then pack this ...
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Validate password for a large set of zip files
I am working on an ETL process for a customer. Another vendor has provided the raw data as a set of approximately 100 password protected ZIP files.
I want to validate that the password given is ...
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gzip uncompressing a bigger file than it lists
So when I use the list flag of gzip the uncompressed size is listed as 3.5g (with ratio of -9.0%):
$ gzip -l piTorrentbox101216.gz
compressed uncompressed ratio uncompressed_name
...
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file-roller: An error occurred while loading the archive (Zip/7z)
As I don't use GUI for archive extraction much, I don't know since when this error I am getting:
An error occurred while loading the archive.
This error I get while trying to open an ordinary Zip ...
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What is the proper way to use an alternative binary
I am on Linux Mint 18 Cinnamon 64-bit.
I have these binaries of 7z and their versions on my system:
/usr/bin/7z
7-Zip [64] 9.20 Copyright (c) 1999-2010 Igor Pavlov 2010-11-18
and
/usr/local/...
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