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absolute path for a script ran with relative path

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# 8  
Old 04-07-2010
quite useful suggestion.(probably reducing d work shell has to do)
# 9  
Old 04-13-2010
Question
I was looking for that trick by long time, thanks for the post.

Just a silly question ... i thought that that command in backticks `command` was equivalent with command like this $( command ) but ..ehm.. i realized now that's not really the same. I tested the alister's trick with $( command ) instead of backticks.. but no success.

So what's the real difference between `command` and $( command ) please?

Thanks and regards.

Mau
# 10  
Old 04-13-2010
The two command substitution syntaxes are not interchangeable; they are subject to different quoting behavior.

Code:
if cd "`dirname \"$0\"`"; then

would be translated to
Code:
if cd "$(dirname "$0")"; then

For more info, see Shell Command Language and https://www.unix.com/302409782-post20.html

In short, using the old style, obsolete backtick syntax can get hairy when used within double quotes and/or when you try to nest command substitutions. The newer syntax, $(...) parses commands just as if they were the top-level, without any special quoting requirements (sooooo much nicer).

Regards,
Alister
# 11  
Old 04-13-2010
MySQL
Thank You very much alister for the clear explanation and links.

Best regards,
Mau
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