What does the RAR file type mean? Why can’t I use the downloaded software?

Using WIN WAR User Manual

~~~~~~~~

RAR 3.51 32-bit console version

~~ ~~~~~~~~~~~~~~~~~~~~~

=-=-=-=-=-=-=-=-=-=-= -=-=-=-

Welcome to RAR archive manager!

-=-=-=-=-=-=-=-=-=-=- =-=-=-=

Introduction

~~~~

RAR is a powerful compression tool that allows you to manage and manipulate compressed files. Console RAR only supports files in RAR

format with the ".rar" extension. ZIP and other formats are not supported. Windows users can

install a graphical version of RAR - WinRAR, which can handle a wider range of compressed file types.

RAR features include:

* Highly mature and original compression algorithm

* For text, sound, images and 32-bit and 64-bit Intel executable programs Special optimization algorithm for compression

* For better compression ratios than similar tools, use 'solid' compression

* Identity verification (only available with registered version)

* Self-extracting compressed files and volume compression (SFX)

* Recovery ability of physically damaged compressed files

* Locking, password, file order list, file security and more...

Configuration files

~~~~~~~~

Unix version of RAR from the user's home or /etc directory The .rarrc file reads the configuration file information

(stored in the HOME environment variable)

The Windows version of RAR reads the configuration file information from the rar.ini file, which is placed in the rar. exe file

in the same directory.

This file contains the following strings:

switches=lt; any RAR switches, separated by spaces gt;

Environment variables

~~~~~~~~

Default parameters can be added to the command line by creating the "RAR" environment variable.

For example, on UNIX, the following command line can be Add to your configuration:

RAR='-s -md1024'

export RAR

RAR will use this string as the default argument on the command line , and will use a dictionary size of 1024KB to create

"solid" compressed files.

RAR control options use the following priorities:

Named line switches highest priority

Switches in RAR variables low priority

The lowest priority of switches saved in the configuration file

Log file

~~~~~~~~

If in the command line or configuration file Specify the switch -ilog, and RAR will write errors encountered in processing compressed files

to the log file. In Unix, this file is named .rarlong and is placed in the user's home directory.

In Windows, it is called rar.log and is placed in the same directory as the rar.exe file. The switch -ilog allows changing the default log name.

Solid compressed file list - rarfiles.lst

~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~

rarfiles.lst contains a user-defined file list that tells RAR the order in which to add files to a solid archive.

It can contain filename wildcards and specify the item -$default. The default item defines the order list position in this file if it does not match

other items. The comment character is ';'.

In Windows, this file should be placed in the same directory as the RAR.

In Unix - placed in the user's home directory or in /etc.

Tips to improve compression ratio and operation speed:

- In compressed files, small files should be organized together;

- Files that are frequently processed It should be placed at the beginning.

Normally a mask has higher priority the closer it is to the top, but there are exceptions to this rule. If rarfiles.lst

contains two masks and all files match both the first mask and the second mask, the smaller subset

or more Exact matches have higher priority. For example, if you use *.cpp and f*.cpp masks,

f*.cpp has higher priority.

RAR command line syntax

~~~~~~~~~~~~~~

Syntax

RAR lt; Command gt; [ -lt; switch gt; ] lt; compressed file gt; [ lt; @list file...gt; ]

[ lt; file...gt; ] [ lt; decompress Path\gt; ]

Description

Command line options (commands and switches) provide control over the creation and management of compressed files using RAR. Command

A command is a string (or a single letter) that instructs RAR to perform a corresponding operation. Switches are used

to change the way RAR performs operations. The other parameters are the archive name and the file to be compressed or to be extracted from the archive

.

The list file is a plain text file that includes the names of the files to be processed. The first column should start with the file name. You can

add a comment after the // character.

For example, you can create backup.lst containing the following string:

c:\work\doc\*.txt //Backup text document

c:\work\image\ *.bmp //Backup pictures

c:\work\misc

Then run:

rar a backup @backup.lst

If you wish to read file names from standard input, specify an empty file list name (@ only).

Win32 Console RAR uses OEM (DOS) encoding in listing files.

You can specify a normal file name and a list file on the same command line. If neither file nor list

files are specified, then RAR will default to *.* to process all files

In a UNIX environment variable, you need to put the wildcard in in quotes to avoid expansion by the shell. For example,

This command will extract all *.asm files from the RAR archive in the current path:

rar e '*.rar' '*.asm'

The command can be any of the following:

a Add files to the compressed file.

Example:

Create or update an existing compressed file myarch, adding all files in the current directory

rar a myarch

c Add compressed file comments. Comments are displayed when the compressed file is processed. The comment length of the file is limited

to 32767 bytes

Example:

rar c distrib.rar

Comments can also be drawn from the file Add:

rar c -zinfo.txt dummy

cf Add file comments. Display file comments when using the 'v' command. File comments are limited to

32767 bytes.

Example:

rar cf bigarch *.txt

cw Write compressed file comments to the specified file.

Example:

rar cw oldarch comment.txt

d Delete files from a compressed archive. Please note that if this command causes the deletion of all files

in the archive, the empty archive will be deleted.

e Extract the file to the current directory.

f Update files in a compressed file. Update files that were changed after being packed into a compressed file. This command does not

add new files to the archive.

i[i|c|h|t]=lt; string gt;

Find the string in the compressed file.

The following optional parameters are supported:

i - case-insensitive (default);

c - case-sensitive search;

h - hexadecimal search;

t - uses ANSI, Unicode and OEM character tables (only available for Win32);

If no parameters are specified, it can use the simplified Command line syntax ilt; string gt; to replace

i=lt; string gt;

It allows specifying a 't' variable with another parameter, for example, ict=string performs a case-sensitive search in all tables mentioned above

.

Example:

1) rar "ic=first level" -r c:\*.rar *.txt

Compress in c:\*.rar *.txt files in the file perform a case-sensitive "first level"

string search

2) rar ih=f0e0aeaeab2d83e3a9 -r e:\text

Search for hexadecimal strings in rar compressed files in the e:\text directory

f0 e0 ae ae ab 2d 83 e3 a9.

k Lock compressed files. Any commands that attempt to alter the archive will be ignored.

Example:

rar k final.rar

l[t, b] Content list of compressed file [technical information]. Lists files like the 'v' command, but does not include the

file path. That is, only the file name is displayed. Optional technical information (main operating system, solid flag and old version flag) is displayed when using the 't' variable. The variable 'b' forces RAR to output only plain

filenames without any additional information.

m[f] Move to compressed file [files only]. Moving files and directories will cause them to be deleted after the compression operation is complete.

If the variable 'f' is used and/or the switch '-ed' is applied, the directory is not deleted.

p Prints the file to the standard output device.

You can use this command with the -inul switch to suppress all RAR messages and print only

file data. This may be important when you need to send a file to the standard output device.

r Repair compressed files. Compressed file repair is done in two stages. First, search for recovery records in the corrupted archive (refer to 'rr' command).

If the compressed file contains a recovery record, and

the damaged data part is contiguous and less than N*512 bytes (N is the number placed in the compressed file recovery block

) , the chances of successfully recovering the compressed file are very high. When this stage is completed, a new

archive will be created named _RECOVER.RAR.

If the damaged archive does not contain a recovery record or if the archive is not fully recovered resulting in large

damage, the second phase will be executed. During this phase only the structure of the compressed file is reconstructed; files that failed the CRC check cannot be recovered. It is still possible to recover undamaged files due to file structure corruption. This is often useful for non-solid compressed files.

When the second phase is completed, the reconstructed compressed file will be saved as rebuilt.arcname.rar,

The location of 'arcname' is the original compressed file name.

RAR/DOS32 versions use _recover.rar and _reconst.rar instead of the

names mentioned above.

During recovery recording, RAR can prompt the user when suspicious files are found.

Suspicious items

Name: lt; Possible file name>

Size: lt; Size>; After compression: lt; Size> after compression;

Add it: Yes/No/All

Answer 'y' to add this item to the file _RECOVER.RAR.

Example:

rar r buggy.rar

rc Use the recovery volume (.rev file) to rebuild the lost volume. You need to specify any existing volume as

the archive name, for example, 'rar rc backup.part03.rar'

Read the 'rv' command description to get information about the recovery volume information.

rn Rename compressed files.

The command syntax is:

rar rn lt; compressed file name gt; lt; source file name 1gt; lt; target file name 1gt; ... lt; source file name Ngt ; lt; target

target file name Ngt;

For example, the following command:

rar rn data.rar readme.txt readme.bak info.txt info .bak

In the compressed file data.rar, readme.txt will be renamed to readme.bak and

info.txt will be renamed to info.bak.

You can use wildcards in the source and target file names to perform name conversions as simple as changing the file extension

. For example:

rar rn data.rar *.txt *.bak

will rename all *.txt files to *.bak.

RAR does not check whether the target file name already exists in the archive, so you need to be careful to prevent

duplicate names. This is especially important when using wildcards. This command is potentially dangerous, since one incorrect wildcard can corrupt all compressed file names.

rr[N] Add data recovery record. Optionally, redundant information (recovery records) can be added to the archive

. This will cause the compressed file size to increase slightly, but can help recover the compressed file in the event of a floppy disk error or other data loss

. A recovery record contains a maximum of 524288 recovery blocks.

The number of blocks can be specified directly in the 'rr' (N = 1, 2.. 524288) command or does not need to be specified by the user.

It is automatically set according to the size of the compressed file. Guaranteed: A recovery message size is approximately 1 of the total compressed file size, which usually allows recovery of contiguous data up to 0.6 of the total compressed file size.

You can also specify the recovery record size as a percentage of the compressed file size. Just add

after the command parameters. For example:

rar rr3 arcname

Note that if you run this command from a .bat or .cmd file, you need to use rr3 instead of rr3, Because the batch command uses the symbol '' as a parameter at the beginning of the batch file. You can

use 'p' instead of '', so 'rr3p' will also work.

If the damaged data is contiguous, each recovery record block helps recover 512

bytes of the damaged information. This value will be reduced if multiple locations are damaged.

The size of the recovery record can be estimated using the formula lt; compressed file size > / 256 lt; number of recovery records > * 512

Bytes.

rv[N] Creates a recovery volume (.rev file), which can later be used to reconstruct lost files in the volume group. This command is only sensitive to multi-volume compressed files. You need to specify the file name of the first volume file in the group.

For example:

rar rv3 data.part01.rar

This function can be used for backup, for example, to send a multi-volume compressed file to a new group , and

and some recipients did not receive some of the files. Resending the recovery volume instead of the normal volume can

reduce the total number of files transferred.

One lost RAR volume can be reconstructed per recovery volume. For example, if you have 30 volumes and 3 recovery volumes, you can create any 3 lost volumes. If the number of .rev files is less than the number of lost volumes, reconstruction will not be possible. The total number of normal and recovery volumes cannot exceed 255.

Option lt;Ngt; parameter specifies the number of recovery volumes to create, which must be less than the total number of RAR volumes. You can also

append a percent sign to this parameter so that the number of .rev files created will be equal to the percentage obtained from the total number of RAR volumes

. For example:

rar rv15 data.part01.rar

RAR, whether using the 'rc' command or automatically, if the next volume cannot be located when decompressing, and

and a usable number of .rev files were found, attempts were made to rebuild both lost and damaged volumes.

The original copy of the damaged volume is renamed *.bad before being rebuilt. For example, volname.part03.rar

will be renamed to volname.part03.rar.bad.

s[name] Converts compressed files to self-extracting format. Compressed files and self-extracting modules are merged (using the

default.sfx module or specified in a switch). In the Windows version, default.sfx should

be placed in the directory where RAR.exe is located. In Unix, it should be in the user's home directory, in

/usr/lib or /usr /local/lib.

s- Remove the self-extracting module from an existing self-extracting archive. RAR creates a new archive without the self-extracting

module, the original self-extracting archive will not be deleted.

t Test compressed files. In order to verify the specified file, this command performs a virtual file decompression operation without writing any output data stream.

Example:

Test the compressed file in the current directory:

or for Unix:

rar t '*'

Starting from the current directory, test the compressed packages in all subdirectories:

rar t -r *

Or for Unix:

rar t -r '*'

u Update files in a compressed file. Add files that are not in the archive and update

files that have changed since packaging.

v[t,b] List the compressed file contents in detail [technical information].

The format used for file listing: absolute pathname, file comment, original and compressed size, compression ratio, last updated date and time, attributes, CRC,

The minimum RAR version required for compression and decompression. Optional technical information (main operating system, solid flag and old file version flag) is displayed when using the 't' variable. The variable 'b' forces RAR to output only plain

filenames without any additional information.

To list the contents of all compressed volumes, use an asterisk ('*') instead of the archive extension or use the '-v'

switch.

Example:

1) List the contents (technical information) of the system.rar compressed file and use the redirection character to output

to the file techlist.lst

rar vt system gt; techlist.lst

2) List the contents of the tutorial.rar compressed file (simple file name mode)

rar vb tutorial

to the current path. AV checking and annotation checking are disabled.

Switches (used with commands):

-? Show help for commands and switches. Same as when there are no parameters or illegal command line options are entered.

-- Stop switch scanning

This switch tells RAR that there are no more switches in the command line. It can be used if the archive or filename

begins with - symbol. Without the '--' switch, such names will be treated as switches

.

Example:

Add all files from the current directory to the solid archive '-StrangeName'

RAR a -s -- -StrangeName

-ac Clear archive attributes after compression or decompression (only available in Windows version).

-ad Append the compressed file name to the target path.

This option can be used when decompressing a group of compressed files. By default RAR places the files extracted from the archive

in the same directory, but this switch creates a separate directory for the files extracted

from each archive. directory.

Example:

rar x -ad *.rar data\

RAR creates a subdirectory under 'data' for each extracted file.

-ag[format]

Use the current date and time to generate the compressed file name.

Appends the current date string to the archive name when creating an archive. Used for daily backups.

Additional string formats have several optional format parameters defined or use "YYYYMMDDHHMMSS".

The format of the string can contain the following characters:

Y - Year

M - Month

MMM - Use a text string as Month name (Jan, Feb, etc.)

W - Week of the year (every week starts on Monday)

A - Day of the week (Monday-1, Sunday - 7)

D - Day of the month

E - Day of the year

H - Hour

M - Minutes (if after hour, treated as minutes)

S - Seconds

N - Number of compressed files. RAR searches for the existence of a file with the name to be generated, and if found

it already exists, the archive number is incremented until a unique name is generated.

Each string listed above represents only one character added to the compressed file name. For example,

Use WW to represent a 2-digit day of the week or YYYY to define a 4-digit year.

If the first character in the formatted string is ' ', the date string and the base archive name

are swapped, so the date will precede the archive name.

The format string can contain optional characters enclosed in '{' and '}'. This text is inserted into the compressed file name.

All other characters are added unchanged to the file name.

If you need to update an existing archive, use the -ag switch with caution. Depending on the format string passed with -ag previously

and the time, the generated and existing archive names may not match

. In this case RAR will create a new archive instead of updating the existing file.

Example:

1) Use the default YYYYMMDDHHMMSS format

rar a -ag backup

2) Use the DD-MMM-YY format

rar a -agDD-MMM-YY backup

3) Use YYYYMMDDHHMM format to replace the date before 'backup'

rar a -ag YYYYMMDDHHMM backup

4) Use YYYY-WW-A format, including section description

rar a -agYYYY{year}-WW{week}-A{wday} backup

5) Use YYYYMMDD and the number of compressed files. It allows you to use -agyymmdd-nn

several times in the same day, and each new archive name will contain a new incrementing number.

rar a -agYYYYMMDD-NN backup

-ao Add files with archive attributes

(Windows version only).

Example:

Add all files with archive attributes on C: to 'f:backup' and clear the file archive attributes

rar a -r -ac -ao f: backup c：\*.*

-ap Set the path inside the compressed file. When adding files to a compressed file, the path is integrated into the file name

and removed from the file name when decompressing.

For example, if you wish to add the file 'readme.txt' to 'DOCS\ENG' in the directory archive 'release'

, you can run:

rar a -apDOCS\ENG release readme.txt

Or unzip 'ENG' to the current directory:

rar x -apDOCS release DOCS\ENG\*.*

-as Synchronize compressed file contents

If this switch is used during compression, these compressed files that do not exist in the currently added file list will be compressed from the compressed file. Delete in. It is convenient to use this switch in combination with -u (update) to synchronize the contents of a compressed file and the directory being compressed.

For example, after executing this command:

rar a -u -as backup sources\*.cpp

The compressed file 'backup.rar' will only contain *.cpp files in the directory 'sources', all other

files will be deleted from the archive. It is very similar to creating a new archive, but with one important difference: if no files have been modified since the most recent backup, this operation is performed faster than creating a new archive.

Be quick.

-av adds identity verification (only available in registered version). RAR will add information about the creator, last update time and archive name every time a new or updated archive is created.

If a compressed file containing identity verification is modified without specifying this switch, the identity

verification information will be deleted.

When decompressing, testing, listing or updating archives using the '-av' switch, RAR will perform an integrity check

and display the message:

Verify identity information...

In case of successful identity verification, the message 'OK' is displayed, the creator's name and the most recent update

information are displayed. In case of authentication failure, 'Failed' will be displayed.

The user identity verification function, '-av', is recommended in software release environments.

In order to enable identity verification, the program must be registered. Please contact your local publishing point or website publishing center.

-av- Disable checking or adding authentication.

-cfg- Ignore configuration files and RAR environment variables.

-cl Convert file names to lowercase letters.

-cu Convert file names to uppercase letters.

-c- Suppress comments.

-df Delete files after compression

Move files to compressed files. This switch combined with command 'A' performs the same action as command 'M'

.

-dh opens shared files

Allows processing of files opened and written by other applications.

This switch is effective if the application allows read access to the file. But if the file's access type

is private, the file open operation will still fail.

This option is dangerous because it allows a file to be compressed while it is being modified by another application

so use with caution.

-ds Do not sort when adding to a solid archive.

-ed Do not add empty directories

This switch indicates that empty directories are not stored in the created archive. When decompressing such an archive, RAR will create non-empty directories based on their internal file paths.

Information about empty directories

is lost. All properties of non-empty directories except names (access rights, streams, etc.) are lost, so only use this switch if you don't need to preserve such information.

-ee does not handle extended attributes

Disables saving and repairing extended file attributes. Only available in OS/2 versions.

-en Do not add "End of archive" block

By default, RAR adds "End of archive" block at the end when creating or updating archives

Bundle" block. It allows skipping extended data like digital security signatures, but disabling these features may be useful under certain conditions

. For example, if a compressed file is passed between two systems over an unreliable connection, and the sender adds new files to it at the same time, it may not be correct. It is important to ensure that the part received during transmission will not be modified by the other end.

This switch cannot be used on volumes, since the archive end block contains important information for correct handling of the volume.

-ep excludes paths from names. When this switch is included, the file will not include path information

when it is added to the archive. This may result in the presence of several files with the same name.

-ep1 Removes the underlying directory from the filename. Paths entered on the command line are not stored.

Example:

All files and directories in the tmp directory will be added to the compressed file 'test', but compressed

compressed file name path Does not contain 'tmp\'

rar a -ep1 -r test tmp\*

This is equivalent to the following command:

cd tmp

rar a -r ..\test

cd ..

-ep2 expands the path to a full path. Store files during compression