sed 与 awk（第二版）学习笔记
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3.3.8 扩展的元字符（egrep 和 awk） ...................................................................................... 19
3.3.9 基础练习 ......................................................................................................................... 20
3.4 POSIX 字符类补充 .................................................................................................................... 20
3.5 示例 .......................................................................................................................................... 21
3.5.1 匹配否定句 ..................................................................................................................... 21
3.5.2 匹配单词“book” ............................................................................................................ 21
3.6 匹配范围 ................................................................................................................................... 22
3.7 限制范围 ................................................................................................................................... 22
3.8 有用的正则表达式 ..................................................................................................................... 23
第四章 编写 sed 脚本 ............................................................................................................................. 24
4.1 引语 .......................................................................................................................................... 24
4.2 模式空间 ................................................................................................................................... 24
4.3 寻址上的全局透视 ..................................................................................................................... 25
4.4 分组命令 ................................................................................................................................... 26
4.5 测试并保存输出 ........................................................................................................................ 26
4.6 sed 脚本的 4 种类型 .................................................................................................................. 27
4.6.1 对同一文件的多重编辑 ................................................................................................... 27
4.6.2
改变一组文件 .................................................................................................................. 28
4.6.3 提取文件内容 .................................................................................................................. 28
4.6.4 编辑工作转移 .................................................................................................................. 29
第五章 基本 sed 命令 ............................................................................................................................. 29
5.1 sed 命令的语法 .......................................................................................................................... 29
5.2 替换 .......................................................................................................................................... 30
5.2.1 flags 段 ............................................................................................................................ 30
5.2.2 replacement 段 ................................................................................................................ 31
5.3 追加、插入和更改 ..................................................................................................................... 31
5.4 列表 .......................................................................................................................................... 32
5.5 转换 .......................................................................................................................................... 32
5.6 打印行号 ................................................................................................................................... 32
5.7 下一步 ....................................................................................................................................... 33
5.8 读和写文件 ............................................................................................................................... 34
