主要命令介绍：ECHO(1) User Commands ECHO(1)NAME echo - display a line of textSYNOPSIS echo [OPTION]... [STRING]...DESCRIPTION Echo the STRING(s) to standard output. -n do not output the trailing newline -e enable interpretation of backslash escapes -E disable interpretation of backslash escapes (default) --help display this help and exit --version output version information and exit If -e is in effect, the following sequences are recognized: \0NNN the character whose ASCII code is NNN (octal) \\ backslash \a alert (BEL) \b backspace \c suppress trailing newline \f form feed \n new line \r carriage return \t horizontal tab \v vertical tab NOTE: your shell may have its own version of echo, which usually super‐ sedes the version described here. Please refer to your shell’s docu‐ mentation for details about the options it supports.AUTHOR Written by FIXME unknown.REPORTING BUGS Report bugs to
.COPYRIGHT Copyright © 2006 Free Software Foundation, Inc. This is free software. You may redistribute copies of it under the terms of the GNU General Public License
. 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 echo should give you access to the complete manual.echo 5.97 March 2007 ECHO(1)

ECHO(1) User Commands ECHO(1)NAME语法: echo [参数]... [字符串]...描述: 将字符(串)输出到标准输出流 -n 输出不换行 -e 反斜杆解释有效 -E 不解释反斜杆(默认) --help 输出本消息并退出 --version 输出版本信息并退出如果 -e 参数存在,下列字符将被解释: \0NNN 输出 ASCII码为 NNN 的数(NNN为八进制数) \\ 反斜杆 \a 警报(响铃) \b 退格 \c 阻止输出新行 \f 换页 \n 新行 \r 回车 \t 水平Tab \v 纵向 Tab

#!/bin/bash#
# 可能是语言解释器选择命令k=1#
# 定义变量while ((k<10))doecho "$k"##输出((k=k+1))done本人的第一个shell程序，输出1-10

我比较熟悉Windows的shell“编程”。。哈哈