I have a number of gzip archives; however they have a zip extension not gz: ***.zip
When I try to unzip them with
unzip, I get
not a zip archive error, and with gunzip I get
unknown suffix: zip
What is going on here really?
Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. It only takes a minute to sign up.Sign up to join this community
gzip will only decompress files with extensions from a limited list—rather than examining the file
magic to determine if it is a gzip'd file. From a comment in
/* ======================================================================== * Return a pointer to the 'z' suffix of a file name, or NULL. For all * systems, ".gz", ".z", ".Z", ".taz", ".tgz", "-gz", "-z" and "_z" are * accepted suffixes, in addition to the value of the --suffix option.
To use input files which are in fact gzip'd but are not named following
gzip's expected conventions, provide the suffix explicitly as per the
gzip manual page:
-S .suf --suffix .suf
... When decompressing, add .suf to the beginning of the list of suffixes to try, when deriving an output file name from an input file name.
$ gunzip -S .zip foo.zip
or use redirection to prevent
gzip from seeing the filename:
$ gunzip < foo.zip > foo.txt