Sed的使用方法

文章由LinuxBoy分享于2019-03-25 01:03:16热评（256）

Sed的使用方法

1>.Sed 读取数据

sed

A).使用sed

从一行开始查找一直到出现有某个词语的行结束

The honesuckle band played all night long for only $90.

It was an evening of splendid music and company.

Too bad the disco floor fell through at 23:10.

The local nurse Miss P.Neave was in attendanc.

-->

//从第二行到出现The的行

sed -n '2,/The/'p test.txt

B). 匹对字符

查找一个含有 $的字符的行

sed -n '/\$/'p test.txt

The honesuckle band played all night long for only $90.

-->

sed -n '/The/'p test.txt

The honesuckle band played all night long for only $90.

The local nurse Miss P.Neave was in attendanc.

-->

C).整篇显示

sed -n '1,$p' test.txt

D).任何单词的行

sed -n '/.*ing/'p test.txt

E).显示行号

sed -n -e '/music/=' test.txt

如果既显示行号又显示该行的内容可以使用

sed -n -e '/music/p' -e '/music/=' test.txt

F). 第一行与最后一行的显示

# the first line

sed -n '1p' test.txt

# and the last line

sed -n '$p' test.txt

2>.sed 的添加字符和文件

3>.sed的替换与删除

The honesuckle band played all night long for only $90.

It was an evening of splendid music and company.

Too bad the disco floor fell through at 23:10.

The local nurse Miss P.Neave was in attendanc.

-->

A).首字符的删除

#删除每行开始的T字母

sed 's/^T*//g' test.txt

#把经过输出到一个新的文件test1.txt中

sed 's/^T*//gw test1.txt' test.txt

w --文件名将结果输出定向到一个文件

p --缺省情况下将被替换行写入标准输出,

n --不打印输出结果.

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Sed的使用方法