Linux ed command
Linux ed command is a text editor for text editing.
ed in Linux is the most simple text editing program, edit line only once, rather than operating full-screen mode.
ed command is not a commonly used commands, more is generally used vi commands. But ed text editor to edit large files or to edit text in a shell script is useful.
grammar
ed [-][-Gs][-p<字符串>][--help][--version][文件]
Parameters:
- -G Or --traditional provide back-compatible functions.
- -p <string> Specifies ed in command mode prompt character.
- -s, -, - quiet or --silent not perform checks when the file is turned on.
- --help displays help.
- --version display version information.
Examples
The following is a complete example of parsing Linux ed:
$ ed <- 激活 ed 命令 a <- 告诉 ed 我要编辑新文件 My name is Titan. <- 输入第一行内容 And I love Perl very much. <- 输入第二行内容 . <- 返回 ed 的命令行状态 i <- 告诉 ed 我要在最后一行之前插入内容 I am 24. <- 将“I am 24.”插入“My name is Titan.”和“And I love Perl very much.”之间 . <- 返回 ed 的命令行状态 c <- 告诉 ed 我要替换最后一行输入内容 I am 24 years old. <- 将“I am 24.”替换成“I am 24 years old.”（注意：这里替换的是最后输的内容） . <- 返回 ed 的命令行状态 w readme.text <- 将文件命名为“readme.text”并保存（注意：如果是编辑已经存在的文件，只需要敲入 w 即可） q <- 完全退出 ed 编辑器
This is the contents of the file are:
$ cat readme.text My name is Titan. I am 24 years old. And I love Perl vrey much.