ed
Estimate Departure time Estimated take-off time; Engineering Development Engineering development; Effective Dose Effective dose
Linuxedcommand syntax
Function: The ed command is a text editor, used for text editing. ed is the simplest text editing program in Linux. It can only edit one line at a time instead of full-screen operation.
Syntax: ed [-][-Gs][-p<string>][--help][--version][file]
Linuxedcommand example
The following is a complete example analysis of 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 content of the file:
$ cat readme.text My name is Titan. I am 24 years old. And I love Perl vrey much.