The linux tail command creates a self-extracting tar file

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The Tail command parameter has a parameter-n,-- lines=N, which can directly output the * * N lines in a file.

With this parameter, combined with the tar command, you can create a self-decompression similar to winrar under windows under linux.

#! / bin/sh

[$#! = "1"] & & echo "Usage: $0 tarfile" & & exit 0

DESTFILE= "$1.sh"

Echo "#! / bin/sh" > $DESTFILE

Echo "LINES=\ `wc-l\ $0 | awk'{print\ $1}'\ `" > > $DESTFILE # calculate the number of lines in the target file

Echo "LINES=\ `expr\ $LINES-4\ `" > $DESTFILE # calculates the lines that need to be output, which is the total number of lines-4 (4 lines execute script)

Echo "tail-n\ $LINES\ $0 | tar-xv" > > $DESTFILE # output and release (you can release the compressed file in combination with-zmermerj)

Echo "exit 0" > > $DESTFILE

Chmod + x $DESTFILE

Cat $1 > > $DESTFILE # add the tar file to the end of the file

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