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.
For Unix/Linux, use the command 'cd /' For Windows, you can also use the same command or 'cd \'
Because CD is short for "Change Directory"
CD /
There is no traditional 'execute' command in Unix.
There is no standard 'format' command in Unix.
The command 'abcde' has a function in the computer world. It is a CD ripper for Linux and UNIX-like operating systems on computers. It is a software package that can be purchased.
cd, pwd, export, help, ulimit, source, eval, if-then-else-elif-fi, ...
In Unix, use the 'man' command.
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