Packt Publishing

really like Bitcoin. I own Bitcoins. It's a store of value, a distributed ledger. It's a great place to put assets, especially in places like Argentina with 40 percent inflation, where $1 today is worth 60 cents in a year, and a government's currency does not hold value. It's also a good investment vehicle if you have an appetite for risk. But it won't be a currency until volatility slows down."

Private keys are generated from large amounts of random data, called entropy

to become your own bank

private key is a large random number that acts as the key to spend your bitcoins.

While /var/log/httpd/ is the default location for Apache logs, this location can be changed with Apache's configuration files.

/var/log/messages

By default, this log file contains all syslog messages (except e-mail) of INFO or higher priority.

/var/log/secure

This log file contains authentication related message items such as:

SSH logins
User creations
Sudo violations and privilege escalation

rpm command with the –q (query) flag, and the –c (configfiles) flag, followed by the name of the package:

find /etc -type f -name "http*"

w – show who is logged on and what they are doing