Hi All,
can you help me with "*" wildcard character in sed, i am a bit confused. I am going through a reference and found that below code

sed -n '/a*c/' file

output :
close the window properly

a* - zero or more occurrences of a

It's capturing the 'c'. If you change the 'c' to a 'z', then nothing will be returned since there is neither an 'a' or 'z' in the string.

$ sed -n '/a*c/p' file
close the window properly

$ sed -n '/a*z/p' file
$

Hi Vgresh, My output doesn't contain any occurrence of "a"

---------- Post updated at 11:52 PM ---------- Previous update was at 11:46 PM ----------

Thanks in2nix4life,
Yes i do understand that its capturing the 'c', but my problem is to understand the functionality of '*'. How does it work, and what does it really look for in a string??

as I said, 'a*' stands for zero or more occurrences of a.
If you want to get lines where an 'a' is followed by anything and a 'c': a.*c

Thanks Vgresh for your quick help, but i think i am not able to explain my problem properly.
can you please also explain a bit about '*' in sed?
I tried but i am really getting confused with this.

Why don't you explain what you're actually after?
What exactly are you trying to do?