DOS     Linux          Notes
BACKUP  tar -Mcvf device dir/  completely different
DOS: create a compressed "backup". For inverse function rf. to RESTORE
CD dirname\ cd dirname/ change directory; almost the same syntax
COPY file1 file2 cp file1 file2  copy source file to destination file
DEL file  rm file  delete file; beware - no undelete
DELTREE dirname  rm -R dirname/  delete complete directory; DOS and Linux ditto
DIR  ls  show the content of a directory; not exactly the same syntax
EDIT file  vi file  open a file in the editor; I think you won't like vi
emacs file  this is better
jstar file  feels like dos' edit
FORMAT  fdformat,
mount, umount  quite different syntax
HELP command  man command  same philosophy
MD dirname  mkdir dirname/  make a new directory; almost the same syntax
MOVE file1 file2   mv file1 file2  ditto
NUL  /dev/null  name of the recycle bin, ditto foir DOS and Linux
PRINT file  lpr file  ditto
PRN  /dev/lp0, /dev/lp1  ditto
RD dirname  rmdir dirname/  remove directory; almost the same syntax
REN file1 file2  mv file1 file2  DOS rename a file; move to another file name has in Linux the same effect as renaming it in DOS; not for multiple files
RESTORE  tar -Mxpvf device  different syntax
decompress the "backup" or tar file
TYPE file               less file Shows the content of a file. Much better
WIN  startx  Starts the graphical user interface. The effect seems poles apart!

  Messages from the kernel: have a look at /var/adm/messages or /var/log/messages as root to see what the kernel has to tell you, including bootup messages.

  Short description of commands are courtesy of Albrecht Grabner. Thanks!