wat does this * sign stand for??

[jeffrey_seeNJ]

any1 tell mi wat this' * 'sign stand for??

[pavlo_7]

It depends on the context.
For example, in a directory it means (substitutes for) all (not hidden) files.
So, if you need to copy all files from directory_A to directory_B, you can use * (asterisk, or star), instead of supplying every file name to the copy command:

cp directory_A/* directory_B/

or it could mean anything in the file name before *, or after the * (depends on how you use it):
For example, let's say you have some files in directory_A:

ls   directory_A
file.txt
file11.txt
file1.tar.gz
file2.tar.gz

and you want to move only tarball files to directory_B, but not the others. In this case it's also convenient to use * (so you do not have to type full names):

cd directory_A
mv *.tar.gz directory_B/

* is also used for many other things.
See Asterisk - Wikipedia, the free encyclopedia
for more information.

[jeffrey_seeNJ]

wat about this sign ^ ?? u noe wat that stand for?

[devils casper]

The asterisk (*), caret (^), and question mark (?) are all wildcard characters. All *nix shells can perform wildcard expansion.

Use the asterisk wildcard if you don't wish to view any hidden files. ls * would display all files and directories in the current directory except for those beginning with a dot (hidden).

If you wish to view only files with five-letter names beginning with a given letter, use the question mark wildcard. ls p???? will display only files with names with five letter files starting with 'p.' You can also use the square brackets for filename completion. ls [a-d]* displays all files and directories that begin with any letter between 'a' and 'd.'

The caret wildcard excludes files. mv *[^.php] ../ would move all files to the parent directory, excluding those with .php extension.

[jeffrey_seeNJ]

hw does ^ works?

[devils casper]

hw does ^ works?

did you try above mentioned example? you should search and do a few experiments yourself. thats the best way of learning IMHO.