The eval command allows you to run the contents of variables as commands and can be very useful, especially in scripts. There are probably a lot of Linux users who have never encountered the eval ...

A vulnerability in the Linux sudo command has been discovered that could allow unprivileged users to execute commands as root. Thankfully, this vulnerability only works in non-standard configurations ...

There's a lot of hubbub out there now about a security hole in the Unix/Linux family's sudo command. Sudo is the command, which enables normal users to run commands as if they were the root user, aka ...