Shell Programming and Scripting

Hi,

Trying to change the prompt. I have the following code.

Code:

export PS1='
[$PWD]
<${USER}@`hostname -s`>$ '

The hostname is not displayed

Code:

[/users/home/abc]
<abc@`hostname -s`>$ uname -a
AIX xyz 1 6 00F736154C00

[/users/home/adcwl4h]
<adcwl4h@`hostname -s`>$

If I use double quotes, then the hostname is printed properly but the path on the screen display does not change even when I change the directory. I'm using korn shell in AIX.

So...
1) what is the diff b/w single and double quote
2) what is the correct code to display my path, user and hostname as I'm trying with the above code.

Appreciate your help.

Single quotes turn of meta meanings entirely, so I prefer them, generally. When setting PS1:

That means

Code:

export PS1='
[$PWD]
<${USER}@'`hostname -s`'>$ '

If user and hostname are not dynamic, why not evaluate them once?

Code:

export PS1='
[$PWD]
<'"$USER@`hostname -s`>"'$ '