Bash Syntax: What is "<<"?

Question

Can someone explain "<in the following code?

mysql test<<E0Q
Select * from signins

I would try to find it myself, but the characters are hard to find ...

Thanks Dan

Answer 1

This is the “file here”, see http://www.linuxjournal.com/article/3771

Answer 2

Here's the docs or a way to easily connect large text blocks to a program.

Answer 3

. , , Linux From Scratch, heredocs cat (>). :

[email protected] ~$ cat >test.c <<EOF
int main(void){return 0;}
EOF
[email protected] ~$

< < EOF EOF `test.c ', , EOF, .

Answer 4

. :

This type of redirection instructs the shell to read input from the
current source until a line containing only word (with no trailing blanks)  is
seen.   All  of  the lines read up to that point are then used as the standard
input for a command.

The format of here-documents is:

       <<[-]word
               here-document
       delimiter

Answer 5

echo read, , "", . -doc -, :

read -a var <<< "some text"

, , "-", -doc.

. this this.