Unzipping multiple files

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# 1  
Unzipping multiple files

I have some 10 to 20 .ZIP files in a given UNIX Directory and how to extract all the files into a one output file and preferably a .GZ file.

Pls suggest.
# 2  
.gz files can only contain one file, so we use something like tar to create an archive and then gzip to compress it:

mkdir tmp
cd tmp
for files in ../*.zip
unzip $files
tar -cf - . | gzip -c > ../all.tgz

I hope this helps
# 3  
Further help required

in unix we use gzcat *.gz | grep or awk like that.

In a similar way how to work on the .zip files without completely extracting them

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