The user smith issued the egrep "^[[:upper:]]" words.txt command. What does this command do?

In bash you can use these quote marks for command substitution.

What happens if you try to write to /dev/null and /dev/zero?

What will 'cat /proc/mdstat' tell you?

what the 'netstat -a' command do?

The backslash on the command line indicates

You can type the _____ command, with no arguments, to learn your current username and nothing more?

You can execute ____ main types of linux commands.

The ____ directory contains the kernel (operating system) images.

You can create user accounts on the linux system by using the ____ command.

The early standard linux file system was ____.