rar.txt

是linux下面使用的安全的一种可以启动的内河

    -mc<par>
            Set advanced compression parameters.

            This switch is intended mainly for benchmarking and
            experiments. In the real environment it is usually better
            to allow RAR to select optimal parameters automatically.
            Please note that improper use of this switch may lead
            to very serious performance and compression loss, so use
            it only if you clearly understand what you do.

            It has the following syntax:

            -mc[param1][:param2][module][+ or -]

            where <module> is the one character field denoting a part
            of the compression algorithm, which has to be configured.

            It may have the following values:

              A       - audio compression;
              C       - true color (RGB) data compression;
              D       - delta compression;
              E       - 32-bit x86 executables compression;
              I       - 64-bit Intel Itanium executables compression;
              T       - text compression.

            '+' sign at the end of switch applies the selected algorithm
            module to all processed data, '-' disables the module at all.
            If no sign is specified, RAR will choose modules automatically,
            based on data and the current compression method.

            Switch -mc- disables all optional modules and allows only
            the general compression algorithm.

            <Param1> and <Param2> are module dependent parameters
            described below.

            Audio compression, delta compression:

            <Param1> is a number of byte channels (can be 1 - 31).
            RAR splits multibyte channels to bytes, for example,
            two 16-bit audio channels are considered by RAR as four
            channels one byte each.

            <Param2> is ignored.


            32-bit x86 Intel executables compression,
            64-bit Intel Itanium executables compression,
            true color (RGB) data compression:

            <Param1> and <Param2> are ignored.


            Text compression: 

            <Param1> is the order of PPM algorithm (can be 2 - 63).
            Usually a higher value slightly increases the compression ratio
            of redundant data, but only if enough memory is available
            to PPM. In case of lack of memory the result may be negative.
            Higher order values decrease both compression and decompression
            speed.

            <Param2> is memory in megabytes allocated for PPM (1-128).
            Higher values may increase the compression ratio, but note
            that PPM uses the equal memory size both to compress and
            decompress, so if you allocate too much memory when creating
            an archive, other people may have problems when decompressing
            it on a computer with less memory installed. Decompression
            will be still possible using virtual memory, but it may
            become very slow.


            Examples:

            1) switch -mc1a+ forces use of 8-bit mono audio compression
            for all data.

            2) switch -mc10:40t+ forces use of text compression
            algorithm for all data, sets the compression order to 10
            and allocates 40 MB memory.

            3) switch -mc12t sets the text compression order to 12,
            when the text compression is used, but leaves to RAR to
            decide when to use it.

            4) switches -mct- -mcd- disable text and delta compression.


    -md<n>  Select dictionary size <n> in KB. Must be 64, 128, 256, 512,
            1024, 2048 or 4096 or a letter 'a', 'b', 'c', 'd', 'e', 'f', 'g'
            respectively.

            The sliding dictionary is a special memory area used by the
            compression algorithm. If the size of the file being compressed
            (or the total files size in the case of a solid archive) is
            greater than the dictionary size, then increasing the dictionary
            size will generally increase compression ratio, decrease packing
            speed and increase memory requirements.

            RAR can reduce the dictionary size if it is significantly
            larger than the size of the source data. It helps to reduce
            memory requirements without decreasing compression.

            Default sliding dictionary size is 4096 KB.

            Example:

            RAR a -s -mdd sources *.asm
                or
            RAR a -s -md512 sources *.asm

            Will create a solid archive using a 512 KB dictionary.


    -ms[list]
            Specify file types to store.

            Specify file types, which will be stored without compression.
            This switch may be used to store already compressed files,
            which helps to increase archiving speed without noticeable
            loss in the compression ratio.

            Optional <list> parameter defines the list of file extensions
            separated by semicolons. For example, -msrar;zip;jpg will
            force RAR to store without compression all RAR and ZIP
            archives and JPG images. It is also allowed to specify wildcard
            file masks in the list, so -ms*.rar;*.zip;*.jpg will work too.

            If <list> is not specified, -ms switch will use the default
            set of extensions, which includes the following file types:

            7z, ace, arj, bz2, cab, gz, jpeg, jpg, lha, lzh, mp3,
            rar, taz, tgz, z, zip


    -mt<threads>
            Set the number of threads. Available in Windows version.
            May be available in some of Unix versions.

            <threads> parameter can take values from 0 to 16.
            It defines the recommended number of active threads
            for compression algorithm. If it is greater than 0,
            RAR will use the multithreaded version of compression
            algorithm providing higher speed on multiprocessor
            architectures. Real number of active threads can differ
            from the specified.

            If <threads> is zero, RAR will use the single threaded
            compression algorithm.

            Change of <threads> parameter slightly affects the compression
            ratio, so archives created with different -mt switches
            will not be exactly the same even if all other compression
            settings are equal.

            If -mt switch is not specified, RAR will try to detect
            the number of available processors and select the optimal
            number of threads automatically.


    -n<f>   Include only the specified file <f>. Wildcards may be used
            both in the name and file parts of file mask. You may specify
            the switch '-n' several times.

            This switch does not replace usual file masks, which still
            need to be entered in the command line. It is an additional
            filter limiting processed files only to those matching
            the include mask specified in -n switch. It can help to
            reduce the command line length sometimes.

            For example, if you need to compress all *.txt and *.lst
            files in directories Project and Info, you can enter:

            rar a -r text Project\*.txt Project\*.lst Info\*.txt Info\*.lst

            or using the switch -n:

            rar a -r -n*.txt -n*.lst text Project Info


    -n@<lf> Include files using the specified list file.

            Similar to -n<f> switch, but reads include masks from
            the list file. If you use -n@ without the list file name
            parameter, it will read file names from stdin.

            Example:

            rar a -r [e-mail] text Project Info


    -oc     Set NTFS Compressed attribute. Win32 version only.

            This switch allows to restore NTFS Compressed attribute
            when extracting files. RAR saves Compressed file attributes
            when creating an archive, but does not restore them unless
            -oc switch is specified.


    -ol     Save symbolic links as the link instead of the file.
            Unix version only.


    -or     Rename extracted files automatically if file with the same name
            already exists. Renamed file will get the name like
            'filename(N).txt', where 'filename.txt' is the original file
            name and 'N' is a number starting from 1 and incrementing
            if file exists.


    -os     Save NTFS streams. Win32 version only.

            This switch has meaning only for NTFS file system under
            Windows NT and allows to save alternative data streams
            associated with a file. It is especially important under
            Windows 2000 and XP, which use streams to keep some file
            dependent information like file descriptions. If you use
            RAR to backup your NTFS disks, it is recommended to specify
            this switch.


    -ow     Use this switch when archiving to save file security
            information and when extracting to restore it.

            Unix RAR version saves file owner and group when using
            this switch.

            Win32 version stores owner, group, file permissions and
            audit information, but only if you have necessary privileges
            to read them. Note that only NTFS file system supports
            file based security under Windows.

    -o+     Overwrite existing files.


    -o-     Do not overwrite existing files.


    -p[p]   Encrypt files with the string <p> as password while archiving.
            The password is case-sensitive. If you omit the password on the
            command line, you will be prompted with message "Enter password".

            Example:

            rar a -pmyhoney secret1 *.txt

            add files *.txt and encrypt them with password "myhoney".


    -p-     Do not query password


    -r      Recurse subdirectories. May be used with commands:
            a, u, f, m, x, e, t, p, v, l, c, cf and s.

            When used with the commands 'a', 'u', 'f', 'm' will process
            files in all sub-directories as well as the current working
            directory.

            When used with the commands x, e, t, p, v, l, c, cf or s will
            process all archives in sub-directories as well as the current
            working directory.


    -r0     Similar to -r, but when used with the commands 'a', 'u', 'f',
            'm' will recurse subdirectories only for those names, which
            include wildcard characters '*' and '?'


    -ri<p>[:<s>]
            Set priority and sleep time. Available only in RAR for Windows.
            This switch regulates system load by RAR in multitasking
            environment. Possible task priority <p> values are 0 - 15.

            If <p> is 0, RAR uses the default task priority.
            <p> equal to 1 sets the lowest possible priority,
            15 - the highest possible.

            Sleep time <s> is a value from 0 to 1000 (milliseconds).
            This is a period of time that RAR gives back to the system
            after every read or write operation while compressing
            or extracting. Non-zero <s> may be useful if you need to reduce
            system load even more than can be achieved with <p> parameter.

            Example:

            execute RAR with default priority and 10 ms sleep time:

            rar a -ri0:10 backup *.*


    -rr[N]  Add a data recovery record. This switch is used when creating
            or modifying an archive to add a data recovery record to
            the archive. See the 'rr[N]' command description for details.


    -rv[N]  Create recovery volumes. This switch is used when creating
            a multivolume archive to generate recovery volumes.
            See the 'rv[N]' command description for details.


    -s      Create solid archive. Solid is a special archive type. Please
            refer to the appendix "Glossary" for further information.

            Example:

            create solid archive sources.rar with 512 KB dictionary,
            recursing all directories, starting with the current directory.
            Add only .asm files:

            rar a -s -md512 sources.rar *.asm -r


    -s<N>   Create solid groups using file count

            Similar to -s, but reset solid statistics after compressing
            <N> files. Usually decreases compression, but also
            decreases losses in case of solid archive damages.


    -se     Create solid groups using extension

            Similar to -s, but reset solid statistics if file extension
            is changed. Usually decreases compression, but also
            decreases losses from solid archive damages.


    -sfx[name]
            Create SFX archives. If this switch is used when creating a new
            archive, a Self-Extracting archive (using a module in file
            default.sfx or specified in the switch) would be created.
            In the Windows version default.sfx should be placed in the
            same directory as the rar.exe, in Unix - in the user's
            home directory, in /usr/lib or /usr/local/lib.