7-Zip是一个开放源码的数据压缩程序，主要用在Microsoft Windows操作系统，Unix-like的操作系统如Linux与 FreeBSD下面有7-zip的移植版本p7zip可以使用。它提供命令行接口的程序或图形用户界面的程序，而且可以与资源管理器结合。7-Zip是自 由软件，由Igor Pavlov于1999年开始发展，并把主体在GNU LGPL下发布，加密部份使用AES的代码，使用BSD license发布，解压RAR部分使用RAR特定的许可协议。
Changes in 7-Zip 9.33 Alpha, 2014-06-15:
– 7-Zip now can show icons for 7-Zip items in Explorer’s context menu.
– “Add to archive” dialog box:
# # new options in “Path Mode”
# # new option “Delete files after compression”
# # new “NTFS” options for WIM and TAR formats:
# # Store symbolic links
# # Store hard links
# # Store alternate data streams
# # Store file security
– “Extract” dialog box:
# # new optional field to set output folder name
# # new option “Eliminate duplication of root folder”
# # new option “Absolute pathnames” in “Path Mode”.
# # new option “Restore file security” (that works for WIM archives only)
– 7-Zip File Manager:
# # new “File / Link” dialog box in to create symbolic links and hard links.
– Command line version:
# # new -spd switch to Disable wildcard matching for file names
# # new -spe switch to Eliminate duplication of root folder for extract archive command
# # new -snh switch to store hard links as links (WIM and TAR formats only)
# # new -snl switch to store symbolic links as links (WIM and TAR formats only)
– NSIS support was improved.
– The command “extract to *” with multiple archives could use same
output folder, if archives are placed inside PE (EXE) file.
– Command line version for test and extract commands returned the value 0 as exit code, if it couldn’t open archive.
– 7-Zip could not create archives with anti-items for any archive type, except of 7z type
– Some bugs were fixed.
– New localization: Mongolian (script).
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