Taking control
Special characters you should know
There's a whole plethora of control characters that can be used to make life easier for you when working in a command-line environment. Every OS is different, so here is a summary of those OpenVMS supports.| Control Character | Effect |
| A | Toggle insert/overstrike mode |
| B | Recall previous command (same as Up Arrow) |
| C | Cancel image execution |
| D | Move left one character |
| E | Move to end of line |
| F | Move right one character |
| H | Move to the beginning of line |
| I | Insert a <Tab> character |
| J | Delete word before cursor position |
| M | Same as pressing <Enter> or <Return> |
| O | Toggles output display on or off |
| Q | XON, resume output after XOFF |
| R | Redisplay entire command line currently entered |
| S | XOFF, pause output display |
| T | Show process statistics; with 7.x, Backup shows detailed I/O info; with 8.2+, Copy, Delete, and Purge, too. |
| U | Erase line before cursor position |
| X | Empty type-ahead buffer |
| Y | Interrupt current image execution (may be resumable with CONTINUE command for some processes) |
| Z | Send <End Of File> |
two comments:
On VMS 8.2+ the output of control T can be customised. On VMS 8.3 setting the new symbol DCL$CTRLT_PID to point to a remote process ID. If you have the necessary privileges, you can then display Ctrl/T information for that process. The remote process can be a different process on the same system or a process on a different system in the cluster.
Ian Miller () (URL) - 14-Dec-2006 - 11:26
I seem to recall Guy Peleg putting out a call for new features that he said would appear some day—I wasn’t sure if this had made it into a released version or not.
Thanks for the Tip!
Aaron () (URL) - 14-Dec-2006 - 19:13
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