To see what user you are logged in as. Not all shells will display the username you are logged in under, so it is useful to know if you are a normal user (so you don't have to worry about accidentally destroying your system), or root (so you don't screw up your personal files by modifying them as root).
The whoami command.
With the whoami command.
The "whoami" command should show you what account you are currently using.
Open a terminal (short-cut key combination: Ctrl + Alt + T) and type a lower-case w and press enter. You can also use whoor whoami with differing results.
At the command prompt, type 'man [command]' (removing the brackets and substituting the command for which you need information).
cp.
For Unix/Linux, use the command 'cd /' For Windows, you can also use the same command or 'cd \'
k is not a standard command in Linux.
For Linux, use the 'mv' command, which is a rename
mount
Viewing a file:"less [filename]"viewing the standard output of a command:"[command] | less"
The c99 command is a wrapper program that actually calls 'cc'. This is the standard c compiler for Linux. Since other Unix based systems use a c99 command to call the compiler with the 1999 standards there is a similar command to do the same thing under Linux.