Day: November 10, 2014

Interstellar movie shows real physics when depicting a black hole.

by

The new Interstellar movie is one that showcases science in a positive light as the possible saviour of mankind. We do need to find other planets to settle on, but why not settle on Mars? It has sunlight that we could use for generating power and water. But travelling through a wormhole is one way … Read more

Count how many times users have successfully logged into your Linux machine.

by

This command will display a count of successful logins to your Linux machine. jason-H55-USB3% grep ‘session opened’ /var/log/auth.log | wc -l 67jason-H55-USB3% grep ‘session opened’ /var/log/auth.log | wc -l 67 This will display a count of failed login attempts to your Linux machine. jason-H55-USB3% grep ‘FAILED LOGIN’ /var/log/auth.log | wc -l 3jason-H55-USB3% grep ‘FAILED LOGIN’ … Read more