compress a file in unix


 
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# 1  
compress a file in unix

Hi,
I want to compress a dmp file and ftp to another machine.pls tell me the steps to compress and uncompress the file in unix
Thankyou
# 2  
This is the pseudo code for the question....The '$' signs are parameters passed to the script....

Make sure you check the path for your zip...

PHP Code:
/usr/local/pkware/pkzipc/pkzipc -add -path=none ${OUTPUTPATH}/${OUTPUTFILE} ${INPUTPATH}/${INPUTFILE
Once it is done, then FTP the zip file to the other server

PHP Code:
ftp -<< EOF
   verbose
   open 
${SERVER
   
$LOGON
   binary
   mput 
*.
   close
   bye
EOF 
# 3  
you can literally type in

compress file

and

uncompress file
# 4  
A word of warning on the compress command - "compress afile.txt" will compress "afile.txt" and rename it "afile.txt.Z", the original afile will no longer exist. So, if you need access to the original after compression, make a copy first!
The uncompress command (or compress -d) works whether you specify afile.txt or afile.txt.Z
# 5  
Here..

There are many compressing commands in UNIX/Linux: zip/unzip,gzip/gunzip,compress/uncompress,pax and so on...
Even tar command now knows to compress, for example
like tar -cvzf myarchive.tar.Z /somedirectory so there is no need to perform
compression as it does it automatically with "z" option added.

Hope it helps.

Get "UNIX in 24 hours" book or "UNIX Essentials and UNIX Core" DVD as they explain stuff like that.
# 6  
[QUOTE=amro1]Even tar command now knows to compress, for example
like tar -cvzf myarchive.tar.Z /somedirectory so there is no need to perform
compression as it does it automatically with "z" option added.
QUOTE]

This is not a standard behaviour in most UNIX systems. It is an extended feature of GNU tar, which may or may not be available.
 

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