I have tar ball "data.tar" which consists of many files from different directories.
If I untar a file using following command, it will untar file to location /input/data
Code:
tar -xvf data.tar /input/data/abc.txt
I want the file to be untar in current directory and or any other directory of my choice. Also it should not overwrite if there is a file with the same name in the directory.
I searched and found that pax command could do it. But could not find the exact command for my need.
I found the following command but looks like the below command will untar all files and not specific file.
It should extract only input.txt to the current directory, and should not try to create the directory structure (/foo/bar in this case) above it. If you use the 'p' option on the substitution parameter (-s) it will print all of the filenames, not just the ones that match the ones given on the command line. The -k option should issue a warning, and not overwrite the file already on disk, if a file exists.
I used bangs (!) in the substitution parameter as it avoids needing to escape the slant and thus is easier to read.
I also believe you can use a pattern so somethingg like "/foo/bar/*.txt" would pull all .txt files from the archive and place them in the current directory. (Quotes are needed here to prevent glob expansion matching anything in the current driectory.)
Hope this gets you a bit further along.
Last edited by agama; 03-26-2012 at 09:33 PM..
Reason: icode tags :)
It should extract only input.txt to the current directory, and should not try to create the directory structure (/foo/bar in this case) above it. If you use the 'p' option on the substitution parameter (-s) it will print all of the filenames, not just the ones that match the ones given on the command line. The -k option should issue a warning, and not overwrite the file already on disk, if a file exists.
I used bangs (!) in the substitution parameter as it avoids needing to escape the slant and thus is easier to read.
I also believe you can use a pattern so somethingg like "/foo/bar/*.txt" would pull all .txt files from the archive and place them in the current directory. (Quotes are needed here to prevent glob expansion matching anything in the current driectory.)
Hope this gets you a bit further along.
Thanks agama this works great except a minor change is needed.
Instead of untarring the file in current directory i would like to untar it to any other directory of my choice. What should be the change.
I understood what the command is doing except the following piece.
Code:
-s "!.*/!!"
I understand it is replacing the directory path but not completley understand it.
If I were writing a script to do this I would cd to the target directory for unload, and then invoke pax. You can put it all in parens (example below) which will eliminate the need to cd back to the original directory:
Code:
( cd /path/to/desired/directory; pax ......)
The substitute command removes all characters from the front of the string through the last slant so that the directory name is removed. It's the same as this sed expression: s/.*\//. I use bangs (!) so as to avoid needing to escape the slant in the pattern.
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