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Explanation for bash code using tar

Posted on 2014-03-11
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Last Modified: 2014-03-11
Question:

Using the tar utitlity, give the specific command(s) you would use to move files a, b, and c from directory
/users/student/rios to /etc/tmp
 

Answer:
( cd /users/student/rios && tar cf - a b c) | (cd /etc/tmp && tar xvpf - )

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can someone tell me what tar cf does and why we need the &&. also does the  | mean we are moving the items to the left? why the xvpf - ?

thanks
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Question by:Mark_Co
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Accepted Solution

by:
Dan Craciun earned 500 total points
ID: 39921374
&& will do the second action only if the first action returns 0 - which means the action was successful

tar x wil e(x)tract the files. v is usually from verbose.

| will pipe the output of the left command to the command on the right

HTH,
Dan
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LVL 35

Assisted Solution

by:Dan Craciun
Dan Craciun earned 500 total points
ID: 39921389
Look at the man page for tar here: http://unixhelp.ed.ac.uk/CGI/man-cgi?tar

c - create
x - extract
v - verbose
p - preserve permissions
f - file
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Author Closing Comment

by:Mark_Co
ID: 39921606
Much obliged
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Expert Comment

by:Dan Craciun
ID: 39921610
Glad I could help!
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