Linux学习手册

日期：2007年8月28日作者：查看:[大字体中字体小字体]

-b 的值越大﹐压缩比例就越大﹐范围是9-16 ﹐默认值是16 。
compress -b 12 source.dat
将source.dat.Z 解压成source.dat ﹐若档案已经存在﹐使用者按y 以确定覆盖档案﹐若使用-df 程序则会自动覆盖档案。由于系统会自动加入.Z 为延伸档名﹐所以source.dat 会自动当作source.dat.Z 处理。
compress -d source.dat
Name: cpio - copy file archives in and out cpio -i [ bBcdfkmPrsStuvV6 ] [ -C bufsize ] [ -E file ] [ -H header ] [ -I file [ -M message ] ] [ -R id ] [ pattern ... ] cpio -o [ aABcLPvV ] [ -C bufsize ] [ -H header ] [ -O file [ -M message ] ] cpio -p [ adlLmPuvV ] [ -R id ] directory Description: An ironic term that refers to the GNU General Public License (the GPL), signifying a radical departure from standard copyright. Back-up utility, similar to tar. Option:

-i (copy in) cpio -i extracts files from the standard input. -o (copy out) cpio -o reads the standard input to oBTain a list of path names and copies those files onto the standard output. -p (pass) cpio -p reads the standard input to obtain a list of path names of files. The following options can be appended in any sequence to the -o, -i, or -p options: -a Reset access times of input files after they have been copied. Access times are not reset for linked files when cpio -pla is specified (mutually exclusive with -m). -A Append files to an archive. The -A option requires the -O option. Valid only with archives that are files, or that are on floppy diskettes or hard disk partitions. -b Reverse the order of the bytes within each word. (Use only with the -i option.) -B Block input/output 5120 bytes to the record. The default buffer size is 512 bytes when this and the -C options are not used. -B does not apply to the pass option; -B is meaningful only with data directed to or from a character special device, for example, /dev/rmt/0m. -c Read or write header information in ASCII character form for portability. There are no UID or GID restrictions associated with this header format. Use this option between SVR4based machines, or the -H odc option between unknown machines. The -c option implies the use of expanded device numbers, which are only supported on SVR4-based systems. When transferring files between Solaris 1.x or Interactive UNIX and Solaris 2.x use -H odc.
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