Hi all,
I downloaded the Advanced Bash Scripting Guide the other day an have
started to work my way through it. I'm fairly new to bash so I get more
than a little confused when the output I get is nothing similar to what
the ABS Guide says it should be.
Here is what has me confused at the moment.
b=${a/23/BB}
echo "b = $b"
Now the ABS guide says that where I'm setting b it should be
substituting BB for 23. It also says that the output of 'echo "b - $b"'
should be: b = BB35
However, what I get as output is as follows:
[EMAIL PROTECTED]:~$ echo "b = $b"
b = total 520716
drwxr-sr-x 2 ffreeloader ftp 48 2005-10-13 07:50 script
-rw-r--r-- 1 ffreeloader ftp 532692172 2005-10-12 09:38 server_2003.zip
Now in my playing around this morning I've been using some command
substitution from the bash prompt that included cd'ing into a directory
that has the files in it that are listed above. I assume that somehow
setting $b to the value I set it to is calling the history command in
the bash shell and that's how I'm getting this output. However, I don't
know why or how it works.
Is there anyone around who can explain this to me? I sure would
appreciate it.
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