thor@host01 /opt$ ll
total 4
-rw-r–r-- 1 root root 196 Mar 12 04:42 apache-tomcat-8.tar.gz
thor@host01 /opt$ sudo tar -xvf apache-tomcat-8.tar.gz
tar: This does not look like a tar archive
gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error is not recoverable: exiting now
thor@host01 /opt$