Provided by: p7zip_9.20.1~dfsg.1-4.2ubuntu0.1_amd64 bug


       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 program supports 7z (that
       implements LZMA compression algorithm), 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  handles  less archive formats than 7z. 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/DOCS/MANUAL/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

              Create SFX archive

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

       -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 compressed

              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 directory.tar.7z
        - 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


       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 "archive.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.