现在,越来越多的人在一台使用Linux;和;Windows.;这应该说是Linux的胜利.;我们知
道,;Linux;要使用交换分区，;
Windows;要使用交换文件。如果一台PIII,;有192M;内存，我们分配给Linux;192M;交换
区，;Windows;2000;至少要;
200M.;那么，我们要用近400M硬盘空间。如果交换区更大，浪费就更可观了。;
由于两个系统的交换区都只是运行时的临时数据,所以,我们采用动态修改分区信息的方法
来达到共享目的.;
2.;方法简介;
1).;备份Windows;分区信息。;
2).;当启动Linux时，;将该分区做成Linux;交换区，并将其激活。;
3）;当Linux;关闭时，将该分区重新变成Windows;交换区。;
3.;具体步骤;
1).;分区;
Fdisk,;只分主分区,;不分扩展分区;
2).;安装;Windows.;
3).;安装Linux;(占一个主分区);
4).;在Linux;下,;分扩展分区);
5).;设定Linux交换区(假定/dev/hda10);
6).;建立winswap;设备;
ln;-s;/dev/hda10;/dev/winswap;
7).;启动Linux,;关闭交换区;
#;swapoff;-a;
8).;从文件安装表中删除该分区;
vi;/etc/fstab;
注释掉该行;(/dev/hda10);
9).;将该分区该成;FAT16;或其他;DOS;分区.;
10).;启动;Windows;
a).;格式化该分区;
b).;将系统的交换文件设在该分区.;
11).;启动;Linux,;计算Total;Special;Sectors;
公式:;
T;=;r;+;(s;*;f);+;(d;/;16);
参数:;
Reserved;Sectors;at;beginning;:;r;
FAT;Copies;:;f;
Sectors;per;FAT;:;s;
Root;directory;entries;:;d;
参见:;msinfo.sh;
注解:;可以运行;msinfo.sh;来获得.;
#;msinfo.sh;/dev/hda10;
12).;备份Windows;分区信息;
#;dd;if=/dev/winswap;bs=512;count=XXX;|;gzip;-9;>;/etc/winswap.gz;
这里,;XXX;=;T;
14).;编写启动,;退出脚本,;并把它们放在;/etc/rc.d/xxx.;
可用;grep;-nr;*;|;grep;swapon;(或;swapoff);来找系统激活和关闭交换区,;将它们
替换称我们;
的脚本);
我们在附录中提供了启动和关闭的脚本.;
4.;附加说明;
1.;本文使用的是FAT16,;如果使用NTFS;或其它,;必须修改脚本.;
2.;mkswap;/dev/winswap;377496;(这个值需要修改,;依照你的分区大小);
5.;参考资料:;
Linux;HOWTO:;Swap-space;
6.;附录;--;相应的脚本;
1.;msinfo.sh;脚本;
#!/bin/sh;
#;
#;msinfo.sh;This;shell;script;displays;the;boot;sector;of;the;
#;given;partition.;
#;
#;Author:;Rahul;U.;Joshi;
#;
#;Modifications;Removed;the;use;of;expr;and;replaced;it;by;the;let;
#;command.;
#;check;for;command;line;arguments;
if;[;$#;-ne;1;];;then;
echo;"Usage:;msinfo;";
exit;1;
fi;
#;check;whether;the;input;name;is;a;block;device;
if;[;!;-b;$1;];;then;
echo;"msinfo:;$1;is;not;a;block;device";
exit;1;
fi;
#;create;two;temporary;files;for;use;
TMPFILE=`mktemp;-q;/tmp/$0.XXXXXX`;
if;[;$?;-ne;0;];;then;
echo;"msinfo:;Can't;create;temp;file,;exiting...";
exit;1;
fi;
TXTFILE=`mktemp;-q;/tmp/$0.XXXXXX`;
if;[;$?;-ne;0;];;then;
echo;"msinfo:;Can't;create;temp;file,;exiting...";
rm;-f;$TMPFILE;
exit;1;
fi;
back_title="`printf;"%78s";"msinfo,;Information;about;FAT16;filesystem;--
Rahul;
Joshi"`";
dialog;--title;"Boot;sector;of;$1";--backtitle;"$back_title";--infobox
"nAnalysing;boot;sector;for;$1nPlease;wait;...";14;60;
#;truncate;TXTFILE;to;zero;length;
echo;>;$TXTFILE;
#;get;Formatting;DOS;version;
dd;2>/dev/null;if=$1;bs=1;count=8;skip=3;|;dd;2>/dev/null;of=$TMPFILE;
printf;>>$TXTFILE;"%30s;:;%sn";"Formatting;DOS;version";"`cat;$TMPFILE`"
#;get;file;system;
dd;2>/dev/null;if=$1;bs=1;count=8;skip=54;|;dd;2>/dev/null;of=$TMPFILE;
printf;>>$TXTFILE;"%30s;:;%sn";"Filesystem";"`cat;$TMPFILE`";
#;check;if;filesystem;in;a;FAT16;
if;[;"`cat;$TMPFILE`";!=;"FAT16;";];;then;
dialog;--title;"Boot;sector;of;$1";--backtitle;"$back_title";--infobox
"nCan't;find;a;FAT16;filesystem;on;$1";14;60;
exit;2;
fi;
#;get;volume;label;in;boot;sector;
dd;2>/dev/null;if=$1;bs=1;count=11;skip=43;|;dd;2>/dev/null;of=$TMPFILE;
printf;>>$TXTFILE;"%30s;:;%sn";"Volume;label;in;boot;sector";"`cat
$TMPFILE`";
#;get;Sector;size;
dd;2>/dev/null;if=$1;bs=1;count=2;skip=11|;od;-An;-tdS;|;dd;2>/dev/null
of=$TMPFILE;
printf;>>$TXTFILE;"%30s;:;%dn";"Sector;size";`cat;$TMPFILE`;
sector_size=`cat;$TMPFILE`;
#;get;Reserved;sectors;
dd;2>/dev/null;if=$1;bs=1;count=2;skip=14|;od;-An;-tdS;|;dd;2>/dev/null
of=$TMPFILE;
printf;>>$TXTFILE;"%30s;:;%dn";";Reserved;sectors";`cat;$TMPFILE`;
reserved_sectors=`cat;$TMPFILE`;
#;get;FAT;sectors;
dd;2>/dev/null;if=$1;bs=1;count=1;skip=16|;od;-An;-tdS;|;dd;2>/dev/null
of=$TMPFILE;
fat_count=`cat;$TMPFILE`;
dd;2>/dev/null;if=$1;bs=1;count=2;skip=22|;od;-An;-tdS;|;dd;2>/dev/null
of=$TMPFILE;
sectors_per_fat=`cat;$TMPFILE`;
#;calculate;the;no;of;sectors;allocated;for;FAT's;
let;fat_sectors=fat_count*sectors_per_fat;
printf;>>$TXTFILE;"%30s;:;%u;(%u;x;%u);n";"FAT;sectors";"$fat_sectors"
"$fat_count";"$sectors_per_fat";
#;get;root;directory;sectors;
dd;2>/dev/null;if=$1;bs=1;count=2;skip=17|;od;-An;-tdS;|;dd;2>/dev/null
of=$TMPFILE;
root_sectors=`cat;$TMPFILE`;
#;calculate;the;no;of;sectors;allocated;for;root;directory;
let;root_sectors=root_sectors*32/sector_size;
printf;>>$TXTFILE;"%30s;:;%un";"Root;directory;sectors";"$root_sectors";
#;get;Total;special;sectors;
let;total=reserved_sectors+fat_sectors+root_sectors;
printf;>>$TXTFILE;"%30s;:;%un";"Total;special;sectors";"$total";
#;display;the;information;in;a;message;box;
dialog;--title;"Boot;sector;of;$1";--backtitle;"$back_title";--msgbox
"`cat;$TXTFILE`";14;60;
#;delete;temporary;files;
rm;-f;$TMPFILE;
rm;-f;$TXTFILE;
#;end;of;msinfo.sh;
2.;swapinit.sh;
#!/bin/sh;
#;
#;/etc/rc.d/init.d/swapinit.sh;-;activate;the;swap;partition;
#;
#;written;by;Rahul;U.;Joshi;
#;Verify;and;initialize;swap;space;
#;
echo;-n;'Verifying;swap;space...;';
loopcount=0;
#;flag;to;indicate;whether;the;partition;has;been;activated;or;not;
activated=0;
#;check;for;signatures;6;times;before;giving;up;
while;[;$loopcount;-lt;6;];
do;
if;[;"`/bin/dd;2>/dev/null;if=/dev/winswap;bs=1;count=10;skip=4086`";=
'SWAPSPACE2';];;then;
echo;"Linux;signature;found,;iteration;$loopcount";
echo;"Activating;swap;partitions";
swapon;/dev/winswap;
activated=1;
break;
elif;[;"`/bin/dd;2>/dev/null;if=/dev/winswap;bs=1;count=5;skip=54`";=
'FAT16';];;then;
echo;"DOS;signature;found,;iteration;$loopcount";
echo;"Making;swap;partition";
mkswap;/dev/winswap;377496;
echo;"Activating;swap;partitions";
swapon;/dev/winswap;
activated=1;
break;
else;
let;loopcount=loopcount+1;
fi;
done;
if;[;$activated;-ne;1;];;;then;
echo;"Swap;signature;not;found;after;$loopcount;tries";
echo;"No;swapping;partitions;activated";
exit;1;
fi;
3.;swaphalt.sh;
#!/bin/sh;
#;
#;/etc/rc.d/init.d/swapinit.sh;-;activate;the;swap;partition;
#;
#;written;by;Rahul;U.;Joshi;
#;Verify;and;initialize;swap;space;
#;
echo;-n;'Verifying;swap;space...;';
loopcount=0;
#;flag;to;indicate;whether;the;partition;has;been;activated;or;not;
activated=0;
#;check;for;signatures;6;times;before;giving;up;
while;[;$loopcount;-lt;6;];
do;
if;[;"`/bin/dd;2>/dev/null;if=/dev/winswap;bs=1;count=10;skip=4086`";=
'SWAPSPACE2';];;then;
echo;"Linux;signature;found,;iteration;$loopcount";
echo;"Activating;swap;partitions";
swapon;/dev/winswap;
activated=1;
break;
elif;[;"`/bin/dd;2>/dev/null;if=/dev/winswap;bs=1;count=5;skip=54`";=
'FAT16';];;then;
echo;"DOS;signature;found,;iteration;$loopcount";
echo;"Making;swap;partition";
mkswap;/dev/winswap;377496;
echo;"Activating;swap;partitions";
swapon;/dev/winswap;
activated=1;
break;
else;
let;loopcount=loopcount+1;
fi;
done;
if;[;$activated;-ne;1;];;;then;
echo;"Swap;signature;not;found;after;$loopcount;tries";
echo;"No;swapping;partitions;activated";
exit;1;
fi
标签： linux
