Recently I encountered a problem while trying to install Quantum Espresso 5.2.0, a Linux-based software, in Ubuntu 14.04. The source was a compressed tar.gz file. I typed the following command to extract the files contained in it :
tar - zxvf espresso-5.2.0.tar.gz
But the Terminal showed the following message :
tar: You must specify one of the '-Acdtrux', '--delete' or '--test-label' options Try 'tar --help' or 'tar --usage' for more information.
I followed the suggestions but couldn’t solve the problem. Could anybody help me with this?