rlogin, rsh and rcp

• Rlogin is a program to allow logins from trusted computers

• With an entry in /etc/hosts.equiv, no password is required.
  rlogin node1

• Rsh allows running a command on a remote computer
  rsh node1 date

• Omitting the command defaults to rlogin

• Rcp is a program to copy files between computers
  rcp my_data node1:
  rcp node1:data node2:

• The r-series is frequently disabled for security reasons