Compress/archive

[a13x]

Ok, I know how to compress a file.

 

zip -r archive.zip file

 

But, how can I split it in several archives of given size ?

 

For example, I have a 5 MB file. I compress it and it's size is reduced to 1.5 MB. I would like the compression utility to break the archive in 2 750KB archives.

 

How do I do this ?

 

[moved from Software by spinynorman]

[Gowator]

I think yopu might need to use bzip2 (although Im not sure)

I know this CAN do it becuase its used as backend for some progs that do it...

[aRTee]

Check the command split, if you just want to split that thing up into 2 files half the size.

man split

Remember, it is already compressed.

 

I hope this is what you need, in which case it's really funny, since you said it already:

But, how can I split it in...

 

Makes me thing back of that time I wanted to rename who ranges of files and finally found that I was looking for the 'rename' command...

Edited October 13, 2004 by aRTee

[a13x]

I was hoping to do it all from one command.

 

Anyway, I played a little with split and it does what I want. How do I merge all those files to one (the 'merge' command ?) ?

 

I've read the bzip2 man page but it doesn't mention any splitting.

[DragonMage]

Well.. I don't usually zip files from cli, but there is a command called zipsplit that splits a zip file into a few files.

[Guest duncangareth]

How about a shell script:

 

Something like:

 

# gzsplit - gzip a file, then split it

# Change default size if you like - this is 10K

DEFAULTSIZE=10240

NARGS=$#

case $NARGS in

2) SIZE=$1; FILE=$2 ;;

1) SIZE=$DEFAULTSIZE; FILE=$1;;

*) echo "Usage: tgzsplit <filename>";

exit 1;;

esac

if [ -r $FILE ]

then

gzip -9 $FILE ; split -b $SIZE $FILE.gz $FILE

else

echo "gzsplit: file $FILE not found."

exit 1

fi

 

To re-assemble the file, simply say:

 

cat filename?? > filename.gz

 

then gunzip it.

[a13x]

Hey, this looks nice. Thx.

 

 

 

 

I'll take that the problem are solved and mark the thread solved - Artificial Intelligence