Linux ed command

Linux Command Reference

The Linux ed command is a text editor used for text editing.

ed is the simplest text editing program in Linux, capable of editing only one line at a time rather than full-screen operation.

The ed command is not a commonly used command; the vi command is generally used more often. However, the ed text editor is useful for editing large files or for performing text editing in shell scripts.

Syntax

ed [-][-Gs][-p<字符串>][--help][--version][文件] 

Parameters：

• -G or --traditional Provides backward compatibility features.
• -p<string> Specifies the prompt character for ed in command mode.
• -s, -, --quiet or --silent Does not perform the check function when opening files.
• --help Display help.
• --version Display version information.

Examples

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 

The content of this file is:

$ cat readme.text 
My name is Titan. 
I am 24 years old. 
And I love Perl vrey much. 

Linux Command Reference