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    <p><code>tar</code> only knows how to process one .tar file at a time: the one specified with <code>f</code>. If you specify additional names on the command line they are interpreted as files to extract from the specified .tar file. </p> <p>Most of the answers so far do not account for unusual file names e.g., those containing spaces, newlines or other special characters).</p> <p>The correct answer is this:</p> <pre><code>for file in *.tar.gz ; do tar xzf "$file" fi </code></pre> <p>The other acceptable answer would be to use <code>find</code></p> <pre><code>find . -maxdepth 1 -type f -name '*.tar.gz' -exec tar xzf {} \;` </code></pre> <p>Why can't I...</p> <ul> <li><p>Use <code>ls *.tar.gz | ...</code> ?</p> <p>Because <code>ls</code> will clobber certain characters in file names (ie, it is not safe). If you must use <code>ls</code> for this you should be careful to use <code>ls -1</code> and then be careful that you treat newline and only newline as a record seperator. This is still not safe, but it's safer.</p></li> <li><p>Use <code>$file</code> without the quotes?</p> <p>Because a file with spaces in the name, among other things, will be interpreted in ways you do not expect. Example: A file named <code>monthly backup.tar.gz</code> will be interpreted as <code>tar xzf monthly backup.tar.gz</code> and you will get an error because the archive <code>monthly</code> does not exist.</p></li> <li><p>Use <code>echo | xargs tar</code> ?</p> <p>Because <code>echo</code> will mangle file names, specifically ones with spaces in the name. </p></li> </ul> <p>When performing a <code>while read</code> loop you almost always want to use <code>read -r</code>, which will prevent backslashes in the input from being interpreted as escape sequences. If you had a file named <code>foo\bar</code> then <code>read</code> without <code>-r</code> would not read it correctly.</p> <p>EDIT:</p> <p>Per comments, here's a method for extracting tarballs into subdirectories.</p> <pre><code>for file in *.tar.gz ; do # strip any leading path information from the file name name_only="${file##*/}" # strip the extension .tar.gz without_extension="${name_only%.tar.gz}" # make a directory named after the tar file, minus extension mkdir -p "$without_extension" # extract the file into its own directory tar xzf "$file" -C "$without_extension" done </code></pre> <p>Above I extract into directories named after the tarball. However, any scheme for making unique directory names would be sufficient. For example, here's a version that extracts to sequentially numbered directories:</p> <pre><code>let n=0 for file in *.tar.gz ; do mkdir -p "$n"; tar xzf "$file" -C "$n" let n=n+1 done </code></pre>
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    1. POHow can I untar a bunch of same packages inside a same folder?
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    1. POHow can I untar a bunch of same packages inside a same folder?
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    1. COgood answer, but a follow up question is that, now every tar.gz has the same filename inside, when I untar all of them , the new files will override the old files. How can i avoid it by renaming the file name automatically?
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    2. CO@Kit Ho: This would require a slightly more complicated script which creates a new sub-directory for each script. I will update my answer to include a sample of how to do that.
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    3. COvery detail answer! thanks
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