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Top Forums Shell Programming and Scripting Loading a tar file into the shell script Post 302590998 by archimedes on Wednesday 18th of January 2012 07:52:27 AM
Old 01-18-2012
hi,

the tar files are binary and so you cannot use the command cat directly on these .tar.gz files. If you do try to do that, it will show some binary characters on screen.

There is however a gzcat command that helps us read binary files.
using this all the content will be read in ascii format.

Code:
File_Load=`gzcat sample.tar.gz`
 
echo "$File_Load" > New_Sample.tar.gz
tar -xvf New_Sample.tar.gz

here, the contents of previous tar will be loaded in New_Sample.tar.gz, but that file will be ascii and not binary.

this what you can do -

Code:
File_Load=`gzcat sample.tar.gz`
 
echo "$File_Load" > New_Sample.txt
 
tar -cvf New_Sample.tar New_Sample.txt
gzip New_Sample.tar

Regards,
A!
 

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SCRIPT(1)						    BSD General Commands Manual 						 SCRIPT(1)

NAME
script -- make typescript of terminal session SYNOPSIS
script [-adfpqr] [-c command] [file] DESCRIPTION
script makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1). If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript. Option: -a Append the output to file or typescript, retaining the prior contents. -c command Run the named command instead of the shell. Useful for capturing the output of a program that behaves differently when associated with a tty. -d When playing back a session with the -p flag, don't sleep between records when playing back a timestamped session. -f Flush output after each write. This is useful for watching the script output in real time. -p Play back a session recorded with the -r flag in real time. -q Be quiet, and don't output started and ended lines. -r Record a session with input, output, and timestamping. The script ends when the forked shell exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not set) for the C-shell, csh(1)). Certain interactive commands, such as vi(1), create garbage in the typescript file. script works best with commands that do not manipulate the screen, the results are meant to emulate a hardcopy terminal. ENVIRONMENT
The following environment variable is used by script: SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically). SEE ALSO
csh(1) (for the history mechanism). HISTORY
The script command appeared in 3.0BSD. BUGS
script places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects. BSD
October 17, 2009 BSD
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