Running "lp*" commands in RHEL results in "Connection refused" or "Transport endpoint not connected"

Solution Verified - Updated -

Issue

  • Running the lpadmin command to try and add a printer results in the following:

    # lpadmin -h localhost -p laser -v lpd://10.1.2.3/xerox_printer
lpadmin: Unable to connect to server: Connection refused

  • Running lpinfo results in the error "Transport endpoint is not connected":

    [root@lnx001 ~]# lpinfo -m
lpinfo: Transport endpoint is not connected

  • Running any CUPS command (lpadmin, lpstat, lp) results in "Connection refused"

Environment

  • Red Hat Enterprise Linux (RHEL), all versions
  • Common Unix Printing System (CUPS), all versions

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