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I've downloaded a '.tar.gz' file from here. File size is 152 MB.

The downloaded file size is 450 MB on my computer !!

I tried to extract that file but I get below error :

gzip: stdin: invalid compressed data

format violated tar: Unexpected

EOF in archive tar: Error is not recoverable: exiting now

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That message mean that the archive file is broken. You should try to redownload it – Arch user May 19 '13 at 9:50
Is there any way to repair a broken file ? – Hamed Kamrava May 19 '13 at 9:53
@HamedKamrava - not really... how would you know if the repair has fixed what was broken? Best to re-download. – fossfreedom May 19 '13 at 10:16
up vote 3 down vote accepted

Your browser probably un-gzipped it automatically, leaving an uncompressed file in plain tar format rather than tar.gz; when I do this for that archive manually using gunzip, I get a file of about 468 MB. Try untarring it without the 'z' decompression flag:

tar xf scilab-5.4.1.bin.linux-i686.tar.gz

or, depending on the file name:

tar xf scilab-5.4.1.bin.linux-i686.tar
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