cp $@ ~/backup

jcky · 03-21-2013, 12:45 AM

Hello all,

cp $@ ~/backup

This command executed not successfully but the book <<Linux shell cookbook>> did this.

Who can help me to explain what's the meaing of this command and waht's $@ ?

Thanks

chrism01 · 03-21-2013, 01:39 AM

Section 3.2.5 http://tldp.org/LDP/Bash-Beginners-G...ml#table_03_01

shivaa · 03-21-2013, 02:13 AM

I guess, it's a part of some script. The $@ is used for positional parameters, starting from one. For example you invoke:

Code:

~$ ./script file1 file2...

Then $@ means "file1 file2..." i.e.

Code:

cp file1 file2... ~/backup

kooru · 03-21-2013, 03:52 AM

http://www.gnu.org/software/bash/man...Shell-Features
section - 3.2.5. Special parameters