buntu system codecs why the incorrect ? ? ?

root @ ubuntu :/ tmp # tar vxjf gmp-5.1.2.tar.bz2
tar (child): gmp-5.1.2.tar.bz2: can not open: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error is not recoverable: exiting now
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you this archive should do is hit the illustrated bz2 tar jcvf gmp-5.1. 2.tar.bz2 decompression can be
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. bz2 suffix , you must first use bunzip2 first extract into gcc-4.5.1.tar, then tar extract
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er er, I try, but before I can use that command to extract gcc-4.5.1.tar .. bz2, to it die, this is how the matter
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but before extracting the files on the same suffix will file will not be damaged or something , because all I was downloading. . .
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If you worry about damage to re-download the chant , but my impression is bz2 bunzip2 first fishes
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er er, well, thank