我有一个文件，里面内容如下;
00 00 00 00 00 00 00 00 05 00 00 00 05 00 00 00
05 00 00 00 05 00 00 00 01 00 00 00 01 00 00 00
01 00 00 00 01 00 00 00 01 00 00 00 01 00 00 00
01 00 00 00 01 00 00 00 01 00 00 00 01 00 00 00
01 00 00 00 01 00 00 00 01 00 00 00 01 00 00 00
01 00 00 00 01 00 00 00 05 00 00 00 05 00 00 00
05 00 00 00 05 00 00 00 05 00 00 00 05 00 00 00
05 00 00 00 05 00 00 00 00 00 00 00 01 02 00 00
01 02 00 00 01 02 00 00 01 02 00 00 00 00 00 00
01 01 1c 05 00 00 00 00 01 00 45 08 01 00 36 04
01 00 32 00 00 00 00 00 01 00 00 b1 01 00 00 60
01 00 01 45 01 00 04 a7 00 00 00 00 01 00 fe 00
00 00 00 00 01 00 00 00 00 00 00 00 01 00 00 00
我想对里面第x行，第y列的数据修改。该怎么写？
如果不想使用屏幕编辑器,可以考虑行编辑器 sed 或者 awk
比如要改第二行第四列的05为06
用awk的话可以
awk 'NR==2 {$4="06"}' myfile > mynewfile 即可
NR==2 表示如果是第二行, $4表示第四项, $4="06" 就改成06了追问
我试了这样改不了啊
追答忘了输出了,呵呵
awk 'NR==2 {$4="06"}{print}' myfile > mynewfile
如果是普通文本文件，那么如楼上所说用awk是最简单的。
如果是二进制文件，用dd修改。追问
改不了
追答少了条print语句。
awk 'NR==2{$4="06"}{print}' myfile >newfile
