7zr - A file archiver with high compression ratio format


   7zr   <command>  [<switches>...  ]  <archive_name>  [<file_names>...  ]
   [<@listfiles>... ]


   7-Zip  is  a  file  archiver  supporting  7z  (that   implements   LZMA
   compression  algorithm  featuring  very high compression ratio), LZMA2,
   XZ, ZIP,  Zip64,  CAB,  RAR  (if  the  non-free  p7zip-rar  package  is
   installed),  ARJ,  GZIP,  BZIP2,  TAR,  CPIO, RPM, ISO, most filesystem
   images and DEB formats.  Compression ratio in  the  new  7z  format  is
   30-50% better than ratio in ZIP format.

   7zr  is  a stand-alone executable.  7zr is a "light-version" of 7za(1).
   7zr handles password-less archives in the 7z,  LZMA2,  and  XZ  formats


   a      Add files to archive

   b      Benchmark

   d      Delete files from archive

   e      Extract files from archive (without using directory names)

   h      Calculate hash values for files

   i      Show information about supported formats

   l      List contents of archive

   rn     Rename files in archive

   t      Test integrity of archive

   u      Update files to archive

   x      eXtract files with full paths


   --     Stop switches parsing

          Include archives

          Exclude archives

          Set Overwrite mode

   -an    Disable archive_name field

          Set output log level

   -bd    Disable progress indicator

          Set output stream for output/error/progress line

   -bt    Show execution time statistics

          Include filenames

          Set              Compression             Method             (see
          /usr/share/doc/p7zip/DOC/MANUAL/cmdline/switches/method.htm from
          the p7zip-full package for a list of methods)

          Set Output directory

          Recurse  subdirectories (CAUTION: this flag does not do what you
          think, avoid using it)

          Set archive name mode

          Set charset for for console input/output

          Set charset for list files

          Set hash function for x, e, h commands

   -sdel  Delete files after compression

          Send archive by email

          Create SFX archive

          Read data from stdin (e.g. tar  cf  -  directory  |  7zr  a  -si

   -slp   Set Large Pages mode

   -slt   Show technical information for l (List) command

   -snh   Store hard links as links

   -snl   Store symbolic links as links

   -sni   Store NT security information

          Store NTFS alternate streams

          Create SFX archive

   -so    Write  data  to stdout (e.g. 7zr x -so directory.tar.7z | tar xf

   -spd   Disable wildcard matching for file names

   -spe   Eliminate duplication of root folder for extract command

   -spf   Use fully qualified file paths

          Set sensitive case mode

   -ssw   Compress shared files

   -stl   Set archive timestamp from the most recently modified file

          Set CPU thread affinity mask (hexadecimal number)

          Exclude archive type

          Set type of archive

          Update options

          Create volumes

          Set working directory. Empty path means a temporary directory

          Exclude filenames

   -y     Assume Yes on all queries


   7-Zip returns the following exit codes:

          0      Normal (no errors or warnings detected)

          1      Warning (Non fatal error(s)).  For  example,  some  files
                 cannot  be  read  during  compressing,  so  they were not

          2      Fatal error

          7      Bad command line parameters

          8      Not enough memory for operation

          255    User stopped the process with control-C (or similar)

Backup and limitations

   DO NOT USE the 7-zip format for backup purpose on Linux/Unix because :
    - 7-zip does not store the owner/group of the file.

   On Linux/Unix, in order to backup directories you must use tar :
    -  to  backup  a  directory   :  tar  cf  -  directory  |  7zr  a  -si
    - to restore your backup : 7zr x -so directory.tar.7z | tar xf -

   If  you  want  to send files and directories (not the owner of file) to
   others Unix/MacOS/Windows users, you can use the 7-zip format.

     example : 7zr a directory.7z  directory

   Do not use "-r" because this flag does not do what you think.

   Do not use directory/* because of ".*" files (example  :  "directory/*"
   does not match "directory/.profile")


   7zr a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on archive.7z dir1
          adds all files from directory "dir1" to archive archive.7z using
          "ultra settings"

   -t7z   7z archive

          lzma method

   -mx=9  level of compression = 9 (Ultra)

          number of fast bytes for LZMA = 64

          dictionary size = 32 megabytes

   -ms=on solid archive = on


   7zr a -sfx archive.exe dir1
          add all files from directory "dir1" to SFX  archive  archive.exe
          (Remark : SFX archive MUST end with ".exe")


   7za(1), 7z(1), p7zip(1), bzip2(1), gzip(1), zip(1),

HTML Documentation

   /usr/share/doc/p7zip/DOC/MANUAL/start.htm  (avabilable  when the p7zip-
   full package is installed)


   Written for Debian by  Mohammed  Adnene  Trojette.  Updated  by  Robert


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.