Linux command
echo 命令
文本
复制后可按需替换文件名、目录或参数。
常用示例
Print text
echo "[Hello World]"
Print without trailing newline
echo -n "[text]"
Interpret escape sequences
echo -e "[Line 1\nLine 2]"
Print an environment variable
echo $[PATH]
Write text to a file
echo "[content]" > [file.txt]
Append text to a file
echo "[more content]" >> [file.txt]
说明
echo displays a line of text to standard output. It's one of the most basic and frequently used commands, essential for scripts, logging, and displaying information to users. The command exists as both a shell built-in and standalone program.
参数
- -n
- Don't output trailing newline
- -e
- Enable interpretation of backslash escapes
- -E
- Disable interpretation of backslash escapes (default)
FAQ
What is the echo command used for?
echo displays a line of text to standard output. It's one of the most basic and frequently used commands, essential for scripts, logging, and displaying information to users. The command exists as both a shell built-in and standalone program.
How do I run a basic echo example?
Run `echo "[Hello World]"` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does -n do in echo?
Don't output trailing newline