31
votes
Different compression methods in 7zip: Which is best suited for what task?
7-Zip (at least as of 2019-09-27) has a built-in Help document with a very, very nice explanation of the various settings you can choose and what, in general, each is good for.
There's no benchmark ...
- 577
4
votes
Accepted
Extract hash values (CRC) and path names from an archive
You can use one line command code to get only CRC lines from command line output:
7z l -slt archive.zip >> "%tmp%\output.txt" && type "%tmp%\output.txt"|findstr /b ...
- 8,243
4
votes
Are there drawbacks to sqlite as archivation format?
The primary disadvantage: you need an sqlite3 executable with archive support when you need to recover your data. Depending on the circumstances, you may not have one handy, but you're far more likely ...
- 161
3
votes
Different compression methods in 7zip: Which is best suited for what task?
Take a look here: http://www.maximumcompression.com/data/summary_mf2.php#data and sort by efficiency. I personally wish FreeArc was built into 7-zip, and do use it sometimes.
3
votes
Can I open .zip files created with split .zip.001 files without 7-zip?
On Windows 7:
Open the folder your split zip file is in
Shift + Right-click
"Open command prompt here"
Type copy my_name.zip.* my_name.zip /b /v /y and press Enter
Open your zip normally
This is ...
- 2,663
2
votes
Accepted
Can an Antivirus delete files inside an archive?
I think it's worth a few sentences to first comment on how most security products approach archives:
Most endpoint real-time/on-access scanners (by default) don't fully scan archives due to the ...
- 2,418
2
votes
Accepted
7-Zip. t (Test integrity of archive) command. Syntax. Two variants. Difference
I understand that both 7z t archive.zip and 7z t archive.zip * should do the exact same thing :
They test the integrity of 'archive.zip' and simulate the extraction of all of its contents.
A further ...
- 171
2
votes
Different compression methods in 7zip: Which is best suited for what task?
The link can be found on wayback machine :
https://web.archive.org/web/20221015140740/http://www.maximumcompression.com/data/summary_mf2.php
(was annoying to reformat the table - can wonder why it can'...
- 21
2
votes
The files after extracting a tar
It's indeed about extended attributes, and i export the following variable:
export COPY_EXTENDED_ATTRIBUTES_DISABLE=true
export COPYFILE_DISABLE=true
Now it wouldn't output ._file on windows.
- 31
1
vote
Accepted
How do I use 7Zip to open a file in an archive with a specific program?
You can set the editor in Tools -> Options... -> Editor -> Editor. Choose the executable and save.
Then RMB on a file and choose Edit or select it and press F4
Alternatively, if you want to ...
- 6,799
1
vote
Accepted
Can a malware file in a .zip file be executed when testing the .zip file?
You can assume it's safe.
Theoretically an exploit could exist in a particular program that could be used to run some code just by making the program look at it. These kinds of bugs are rather rare ...
- 57k
1
vote
Accepted
7-Zip. h (Hash) command. Calculate hash values for files. When you use it?
If you were publishing a file online, and you published the hash with it, then people who were downloading the file could check that the hash matched. If it matches it indicates the file was not ...
- 9,035
1
vote
Is it possible to make equally sized multipart rar archives from a big file?
Yes it is possible. (If you already know how many parts your archive will be split into) Your command will be:
rar a -v$(( $(ls -s your_big_file | awk '{print $1}') / number_of_parts)) arcname ...
- 93
1
vote
Can I open .zip files created with split .zip.001 files without 7-zip?
Sure!
Windows has a default zip uncompresser. Just right click on the file and unzip.
But if this doesn't work, you can always download Winrar. The procces is the same, right click on the file and ...
- 111
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