Shell Programming and Scripting

zipped="abc.csv.gz"
unzipped=`basename "${zipped}" ".gz"`
echo "${unzipped}"
abc.csv

for file in ${DIR}/*\.zip
	do
	       unzip -oqq $file
	done

       [-d exdir]
              An optional directory to which to extract files.  By default, all files and subdirectories are recreated in the current directory; the  -d  option
              allows  extraction  in  an arbitrary directory (always assuming one has permission to write to the directory).  This option need not appear at the
              end of the command line; it is also accepted before the zipfile specification (with the normal options), immediately after the zipfile  specifica-
              tion,  or between the file(s) and the -x option.  The option and directory may be concatenated without any white space between them, but note that
              this may cause normal shell behavior to be suppressed.  In particular, ''-d ~'' (tilde) is expanded by Unix C shells into the name of  the  user's
              home directory, but ''-d~'' is treated as a literal subdirectory ''~'' of the current directory.

for file in ${DIR}/*\.zip
	do
	       unzip -d $DIR -oqq $file
	done

gunzip $file