[Linux] I just learned shell and encountered a problem. The total error occurred during execution: Unexpected Operator

I just learned shell and encountered a problem. The total error occurred during execution: Unexpected
Operator. I used Ubuntu 9. 04. I learned from laruence to go to the shell script section,

The script is as follows:

#! /Bin/bash

# Program:

#       This program shows the user's choice

# History:

#2005/08/25       Vbird       First release

Path =/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin :~ /Bin

Export path


Read-P "Please input (y/N):" YN

["$ YN" = "Y"-o "$ YN" = "Y"] & Echo "OK, continue" & Exit 0

["$ YN" = "N"-o "$ YN" = "N"] & Echo "Oh, interrupt! "& Exit 0

Echo "I don't know what your choice is" & Exit 0


Error prompted during execution

Root @ dustsnow-LAPTOP :~ /Scripts # sh sh06.sh

Please input (y/N): Y

[: 10: Y: Unexpected Operator

[: 11: Y: Unexpected Operator

I don't know what your choice is


But it is correctly executed in the fedora 11 System of the VM.


The solution cannot be found online.

Have you encountered the same problem,

Thank you first


Solution: solve the problem on the Ubuntu Chinese forum.

Because the default SH of Ubuntu is connected to dash, and the dash and bash are incompatible, an error occurs. during execution, you can replace sh with the bash file name. sh to execute. successful. dash is something. After checking it, it should also be a shell, which seems to be a lot of criticism from users.

By the way, modify sh to connect to bash by default:
Sudo dpkg-reconfigure dash

Select No.

Reference: http://hi.baidu.com/nako521/blog/item/248fee953b52454fd1135eb7 . Html

I do not know whether the summary is accurate. If any error occurs, please correct me.Reprinted: http://blog.sina.com.cn/s/blog_63484d2d0100mdfn.html