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Updated: Wednesday, February 9, 2022

7zr (1)


7zr - A file archiver with highest compression ratio


7zr [adeltux] [-] [SWITCH] <ARCHIVE_NAME> <ARGUMENTS>...


7zr(1)                      General Commands Manual                     7zr(1)

       7zr - A file archiver with highest compression ratio

       7zr [adeltux] [-] [SWITCH] <ARCHIVE_NAME> <ARGUMENTS>...

       7-Zip  is  a file archiver with the highest compression ratio. The pro-
       gram supports 7z (that implements  LZMA  compression  algorithm),  ZIP,
       CAB,  ARJ,  GZIP,  BZIP2,  TAR,  CPIO, RPM 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 handles less archive formats  than
       7z,  but does not need any others. 7zr is a "light-version" of 7za that
       only handles 7z archives.

       a      Add

       d      Delete

       e      Extract

       l      List

       t      Test

       u      Update

       x      eXtract with full paths

              Include archives

              eXclude archives

       -bd    Disable percentage indicator

              Include filenames

       -l     don't store symlinks; store the files/directories they point  to
              (CAUTION : the scanning stage can never end because of recursive
              symlinks like 'ln -s .. ldir')

              Set  Compression   Method   (see   /usr/share/doc/p7zip/DOC/MAN-
              UAL/switches/method.htm for a list of methods)

              7z  format  only : enables or disables archive header encryption
              (Default : off)

              Set Output directory

              Set Password

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

              Create SFX archive

       -si    Read  data from StdIn (eg: tar cf - directory | 7zr a -si direc-

       -so    Write data to StdOut (eg: 7zr x -so directory.tar.7z | tar xf -)

       -slt   Sets technical mode for l (list) command

              Create volumes

              Update options

              Set Working 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 com-

              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  direc-
        - 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")

       7zr a -mhe=on -pmy_password archive.7z a_directory
              add  all  files from directory "a_directory" to the archive "ar-
              chive.7z" (with data and header archive encryption on)

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

HTML Documentation

       Written for Debian by Mohammed Adnene Trojette.

Mohammed Adnene Trojette       September 1 2006                         7zr(1)