dd is an abbreviation for "data definition." It is often jokingly said to stand for "destroy data."
Unix command for copyunixhelp.ed.ac.uk/CGI/man-cgi?cp
There is no traditional 'execute' command in Unix.
There is no standard 'format' command in Unix.
The 'CD' command is not standard for Unix. The 'cd' command, however, will change directories (folders). It is a means of navigating the Unix file system.
In Unix, use the 'man' command.
"dd" is a command within UNIX and Linux based operating systems that allows one to perform low level copies of devices. dd may have at one point stood for "disk duplicator"
The "who" command.
cat /proc/version The above answer will only work on certain systems. For most Unix systems, use the 'uname' command to get the Unix version. AIX uses the oslevel command.
dig
nslookup
Believe it or not, nslookup.
Unix To Unix Copy Protocol