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     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), 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.

than  7z,  but does not need any others. 7zr is a "light-version"
of 7za that only handles 7z archives.
     7zr is a stand-
          alone executable. 7zr handles less archive formats

Function Letters
     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
          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 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  simi-

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

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

Example 1
     7zr a -t7z -m0=lzma -mx=9 -mfb=64
          adds  all  files  from  directory  "dir1"  to   archive
          archive.7z using "ultra settings"

     -t7z 7z archive

          lzma method

          level of compression = 9 (Ultra)

          number of fast bytes for LZMA = 64

          dictionary size = 32 megabytes

          solid archive = on

Example 2
     7zr a -sfx archive.exe dir1
          add all files from  directory  "dir1"  to  SFX  archive
          archive.exe (Remark : SFX archive MUST end with ".exe")

Example 3
     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)

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

HTML Documentation

     Written for Debian by Mohammed Adnene Trojette.
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