ud command The ud BASIC program invokes the Update processor to edit ADIs or file-defining items in the dictionary of the specified file.
um command The um command displays the conversion units set by the set-units, set-dozens, set-decimal, or set-thousands commands.
unix command The unix command invokes the sh command, to push a shell, and then automatically returns to D3 on completion.
unlink-pibdev command The unlink-pibdev BASIC program unlinks a process from a port.
unlock-file command The unlock-file command clears file locks which have not been cleared through normal system operation.
unlock-frame command The unlock-frame command clears the memory corelock previously core-locked with a lock-frame command.
unlock-group command The unlock-group command in the DM account clears group locks.
unlock-item command The unlock-item BASIC program clears item locks that have not cleared through usual system operation.
unset command The unset BASIC program deletes a D3 user shell variable.
update command The update command invokes the Update processor for adding, changing, deleting, or cruising through data in a given file.
update-abs-stamp command The update-abs-stamp command in the DM account is invoked by the abs.fid command. This command also produces the actual output.
update-logging command The update-logging command toggles or displays the status of the transaction logger subsystem.
update-md command The update-md BASIC program updates command definitions in a specified account master dictionary, or in a list of master dictionaries. Any conflicts found are logged in the clashes file, with a new data section added for each account.
update-prot command The update-prot command toggles or displays the status of the file update protection scheme. When enabled, this feature globally protects all item updates so that a power-off condition does not cause a file inconsistency.
user.coldstart command The user.coldstart command is invoked by the coldstart to call the user.coldstart routine.
user-coldstart macro The user.coldstart macro performs the last step of the coldstart process and is the place where users can customize their own sequence of activities to perform each time the system is powered on or rebooted.
user-shutdown macro The user-shutdown macro is called by the shutdown command as the first procedure in shutting down the machine.
useralarm command The useralarm BASIC program is an alarm handler used by the trap command when a task is scheduled to be executed at a given time. When the alarm goes off, it scans the item dm,alarm.file,username to find what to do next. This command is not normally executed at TCL.