1 .\" You may copy, distribute and modify under the terms of the LDP General
2 .\" Public License as specified in the LICENSE file that comes with the
3 .\" gnumaniak distribution
5 .\" The author kindly requests that no comments regarding the "better"
6 .\" suitability or up-to-date notices of any info documentation alternative
7 .\" is added without contacting him first.
9 .\" (C) 2002 Ragnar Hojland Espinosa <ragnar@ragnar-hojland.com>
11 .\" GNU shred man page
12 .\" man pages are NOT obsolete!
13 .\" <ragnar@ragnar-hojland.com>
15 .\" Japanese Version Copyright (c) 2003 Yuichi SATO
16 .\" all rights reserved.
17 .\" Translated Sun Apr 27 22:01:01 JST 2003
18 .\" by Yuichi SATO <ysato444@yahoo.co.jp>
20 .TH SHRED 1 "18 June 2002" "GNU fileutils 4.1"
22 \fBshred\fR \- ¥Õ¥¡¥¤¥ë¤ò·«¤êÊÖ¤·¾å½ñ¤¤¹¤ë
24 .BR "shred " [ \-\fIITERS\fB "] [" \-fuvxz "] [" "\-n \fIITERS\fB "] [" "\-s \fISIZE\fR "] "
25 .RB [ \-\-force "] [" \-\-iterations=\fIITER\fB "] [" \-\-size=\fISIZE\fB "] "
26 .RB [ \-\-remove "] [" \-\-verbose "] [" \-\-exact "] [" \-\-zero "] "
29 .BR shred " [" \-\-help "] [" \-\-version ]
32 ¤Ï»ØÄꤵ¤ì¤¿¥Õ¥¡¥¤¥ë \fIFILE\fR ¤ò
33 ÆÃÊ̤ʥѥ¿¡¼¥ó¤Ç·«¤êÊÖ¤·¾å½ñ¤¤·¡¢
34 ¥Ç¡¼¥¿¤ÎÉüµì¤¬¤è¤êº¤Æñ¤Ë¤Ê¤ë¤è¤¦¤Ë¤¹¤ë¡£
38 ¤Î¾ì¹ç¡¢ÆþÎÏ¥Õ¥¡¥¤¥ë¤È¤·¤Æɸ½àÆþÎϤ¬»È¤ï¤ì¤ë¡£
40 \fBshred\fR ¤Ï¥Õ¥¡¥¤¥ë¤Ø¤Î¼ÂºÝ¤Î½ñ¤¹þ¤ßÁàºî¤¬
41 (ÌõÃð: ½ñ¤¹þ¤ßÁàºî¤ò¹Ô¤Ã¤¿¥Ç¥Ð¥¤¥¹¤È)
42 Ʊ¤¸¾ì½ê¤Çµ¯¤ë¤³¤È¤ò²¾Äꤷ¤ÆÆ°ºî¤¹¤ë¤¬¡¢
43 (¥È¥é¥ó¥¶¥¯¥·¥ç¥ó´ÉÍý¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¡¦Ê¬»¶¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¡¦
44 ¥ê¥â¡¼¥È¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Ç¤Ï)
45 ½ñ¤¹þ¤ß¤¬Æ±¤¸¾ì½ê¤Çµ¯¤é¤Ê¤¤²ÄǽÀ¤â¤¢¤ë¤Î¤ÇÃí°Õ¤¹¤ë¤³¤È¡£
46 ¤Þ¤¿ (RAID ¤¬»ÈÍѤµ¤ì¤Æ¤¤¤ë¾ì¹ç) ¤¢¤ë¥Ç¥Ð¥¤¥¹ (/dev/hda ¤Ê¤É) ¤Ç
47 \fBshred\fR ¤¬»ÈÍѤµ¤ì¤ë¤È¡¢
48 RAID ¤Ï¤³¤ÎÁàºî¤ò¾¤Î¥Ç¥Ð¥¤¥¹¤ËÂФ·¤Æ¤âƱ¤¸¤è¤¦¤Ë¹Ô¤¦¡£
52 ²Äǽ¤Ç¤¢¤ì¤Ð¡¢¥Ñ¡¼¥ß¥Ã¥·¥ç¥ó¤ò̵»ë¤¹¤ë¡£
54 .B "\-\fIITERS\fB, \-n \fIITERS\fB, \-\-iterations=\fIITERS\fB"
55 \fIITERS\fR ²ó·«¤êÊÖ¤·¾å½ñ¤¤¹¤ë¡£(¥Ç¥Õ¥©¥ë¥È: 25)
57 .B "\-s \fISIZE\fR, \-\-size=\fISIZE\fR"
58 \fISIZE\fR ¥Ð¥¤¥È¤Î¤ß¤òÀÚ¤ìÀÚ¤ì¤Ë¤¹¤ë¡£
59 ¥µ¥¤¥º¤Ë¤Ï¾è¿ô¤Îʸ»ú¤ò»È¤¦¤³¤È¤¬¤Ç¤¤ë (²¼µ»²¾È)¡£
62 \fBshred\fR ¤ò¼Â¹Ô¤·¤¿¸å¡¢ÀÚ¤êµÍ¤á¤Æ (truncate) ¥¢¥ó¥ê¥ó¥¯¤¹¤ë¡£
65 ¿ÊĽ¾õ¶·¤Î¥á¥Ã¥»¡¼¥¸¤òɽ¼¨¤¹¤ë¡£
68 Á´¥Ö¥í¥Ã¥¯¿ô°Ê¾å¤Ë¥Õ¥¡¥¤¥ë¥µ¥¤¥º¤òÂ礤¯¤·¤Ê¤¤¡£
71 \fBshred\fR ¤ò¼Â¹Ô¤·¤¿¸å¡¢NUL ¤Ç¾å½ñ¤¤¹¤ë¡£
74 ɸ½à½ÐÎϤ˻ÈÍÑÊýË¡¤Î¥á¥Ã¥»¡¼¥¸¤ò½ÐÎϤ·¤ÆÀµ¾ï½ªÎ»¤¹¤ë¡£
77 ɸ½à½ÐÎϤ˥С¼¥¸¥ç¥ó¾ðÊó¤ò½ÐÎϤ·¤ÆÀµ¾ï½ªÎ»¤¹¤ë¡£
79 ¥µ¥¤¥º¿ôÃͤθå¤Ë¤Ï¾è¿ô¤ò»ØÄꤹ¤ë¥µ¥¤¥ºÊ¸»ú¤È¡¢
80 Ä̾ï¤Î¥Ð¥¤¥È¤òÁªÂò¤¹¤ë \fBB\fR
81 ¤Þ¤¿¤Ï 10 ¿Ê¤Î¡Ö¾¦¶ÈÍѡץХ¤¥È¤òÁªÂò¤¹¤ë \fBD\fR ¤ò³¤±¤Æ¤â¤è¤¤¡£
82 Î㤨¤Ð `1KB' ¤Ï `1024' ¤Ç `1KD' ¤Ï `1000' ¤Ç¤¢¤ë¡£
83 \fBb\fR (512 ¥Ð¥¤¥È), \fBc\fR (1 ¥Ð¥¤¥È),
84 \fBw\fR (¤³¤ì¤Ï»ÈÍѤ¹¤Ù¤¤Ç¤Ê¤¤ - System V ¤Ç¤Ï 2¡¢
85 4.2BSD ¤Ç¤Ï 4 ¤ò°ÕÌ£¤¹¤ë) ¤ÏÎã³°¤Ç¤¢¤ê¡¢
86 \fBB\fR ¤ä \fBD\fR ¤ò³¤±¤ë¤³¤È¤Ï¤Ç¤¤Ê¤¤¡£
89 ¥¥í: Ä̾ï¤Î¥Ð¥¤¥È¤Ê¤é 2^10 = 1024¡¢
90 10 ¿Ê¤Î¥Ð¥¤¥È¤Ê¤é 10^3 = 1000
93 ¥á¥¬: 2^20 = 1,048,576 ¤Þ¤¿¤Ï 10^6 = 1,000,000
96 ¥®¥¬: 2^30 = 1,073,741,824 ¤Þ¤¿¤Ï 10^9 = 1,000,000,000
99 ¥Æ¥é: 2^40 = 1,099,511,627,776 ¤Þ¤¿¤Ï 10^12 = 1,000,000,000,000
102 ¥Ú¥¿: 2^50 = 1,125,899,906,842,624 ¤Þ¤¿¤Ï 10^15 = 1,000,000,000,000,000
105 ¥¨¥¯¥µ: 2^60 = 1,152,921,504,606,846,976
106 ¤Þ¤¿¤Ï 10^18 = 1,000,000,000,000,000,000
109 ¥¼¥¿: 2^70 = 1,180,591,620,717,411,303,424
110 ¤Þ¤¿¤Ï 10^21 = 1,000,000,000,000,000,000,000
113 ¥è¥¿: 2^80 = 1,208,925,819,614,629,174,706,176
114 ¤Þ¤¿¤Ï 10^24 = 1,000,000,000,000,000,000,000,000
116 Peter Gutmann ¤ÎÏÀʸ `Secure Deletion of Data from Magnetic and Solid-State
117 Memory', ½Ðŵ the proceedings of the Sixth USENIX Security Symposium (San
118 Jose, California, 22-25 July, 1996)¡£
120 http://www.cs.auckland.ac.nz/~pgut001/pubs/secure_del.html
121 ¤«¤é¥ª¥ó¥é¥¤¥ó¤ÇÆþ¼ê¤Ç¤¤ë¡£
124 ¥×¥í¥°¥é¥à¤Î¥Ð¥°¤Ï bug-fileutils@gnu.org ¤ØÊó¹ð¤·¤Æ¤¯¤À¤µ¤¤¡£
126 ¤³¤Î man ¥Ú¡¼¥¸¤Ï Ragnar Hojland Espinosa
127 <ragnar@ragnar-hojland.com> ¤¬ºîÀ®¤·¤¿¡£