Linux命令:echo 分类： Ubuntu学习笔记 2015-07-26 21:29 61人阅读 评论(0) 收藏

NAME

echo - display a line of text

SYNOPSIS

echo [SHORT-OPTION]... [STRING]...

echo LONG-OPTION

DESCRIPTION

Echo the STRING(s) to standard output.

-n do not output the trailing newline

禁止自动在行尾输入换行符

-e enable interpretation of backslash escapes

使能特殊字符的处理

-E disable interpretation of backslash escapes (default)

关闭特殊字符的处理，默认方式

--help display this help and exit

--version

output version information and exit

If -e is in effect, the following sequences are recognized:

若加入－e参数，以下命令会被识别

\\ backslash

发出警告声

\a alert (BEL)

删除前一个字符

\b backspace

该符号后的字符不予输出，且不会自动换行

\c produce no further output

\e escape

\f form feed

\n new line

\r carriage return

\t horizontal tab

\v vertical tab

八进制表示的ASCII码

\0NNN byte with octal value NNN (1 to 3 digits)

十六进制表示的ASCII码

\xHH byte with hexadecimal value HH (1 to 2 digits)

NOTE: your shell may have its own version of echo, which usually supersedes the version described here. Please refer to your shell's docu‐

mentation for details about the options it supports.

AUTHOR

Written by Brian Fox and Chet Ramey.

REPORTING BUGS

Report echo bugs to bug-coreutils@gnu.org

GNU coreutils home page: <http://www.gnu.org/software/coreutils/>

General help using GNU software: <http://www.gnu.org/gethelp/>

Report echo translation bugs to <http://translationproject.org/team/>

COPYRIGHT

Copyright © 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.

This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

The full documentation for echo is maintained as a Texinfo manual. If the info and echo programs are properly installed at your site, the

command

info coreutils 'echo invocation'

should give you access to the complete manual.