zcat – Expands a compressed file to standard output
zcat uncompresses either a list of files on the command line or its standard input and writes the uncompressed data on standard output. zcat will uncompress files whether they have a .gz suffix or not.
zcat [ -f ] [ File … ]
To view the contents of zipped file
$ cat file1.txt abc def ghi $ gzip file1.txt $ zcat file1.txt.gz abc def ghi
Display the file content without worrying about whether it is compressed or not. When you are not sure whether a file is compressed or not, you can still view the file without worrying about it’s compression status as shown below.
zcat -f input-file