openvms:openvms-cheatsheet
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Table of Contents
[CHEATSHEET] OpenVMS
Keywords
sort code | Full name | Translation to linux |
---|---|---|
UAF | User authorization File | It's a combination of etc/passwd , etc/group and SElinux/DB concepts with grants and roles |
UIC | User Identification CODE | UID the user identificator, in OpenVMS is [1,100] . As in linux should NOT be unique |
DCL | Digital Command Language | bash |
CDU | Command definition utility | It's a kind of IDE or getops , allow command line definitions |
key concepts
Login
OpenVMS | Linux |
---|---|
SYS$MANAGER:SYLOGIN.COM | /etc/bashrc |
SYS$LOGIN:LOGIN.COM | ${HOME}/.bashrc |
Cancel command input
OpenVMS | Linux | Comment |
---|---|---|
CTRL/Y | CTRL+C | when writing a command and you have a mistake, cancel the input (similar to sqlplus and CTRL+C ) |
CTRL/Z | CTRL+C | Similar but on a interactive input prompt (running a cmd in interactive input mode) |
Startup
Show available boot devices
show device
boot from device
boot [DEVICE]
ex:
boot DKA0
Login
root is SYSTEM
:
Welcome to OpenVMS (TM) Alpha Operating System, Version V8.3 Username: SYSTEM Password:
Logout
LOGOUT
LOGOUT/FULL
Basic Commands
df
SHOW DEVICE SYS$SYSDEVICE
See system parameters
To check the values of your system parameters, enter the following command:
RUN SYS$SYSTEM:SYSGEN
And then under SYSGEN>
prompt, you can list parameters, for example:
SHOW WSMAX
Show system pagelets
WRITE SYS$OUTPUT F$GETSYI("CONTIG_GBLPAGES")
Show free pagelets
WRITE SYS$OUTPUT F$GETSYI("FREE_GBLSECTS")
Generate more pagelets
AUTOGEN
Find how many pagelets are used by EXE
In this case DCLTABLES.EXE
DIRECTORY/SIZE SYS$LIBRARY:DCLTABLES.EXE
System config
change system config
You have to edit:
SYS$SYSTEM:MODPARAMS.DAT
Still don't know how to edit…
update system parameters and reboot
@SYS$UPDATE:AUTOGEN GETDATA REBOOT
Change dynamic parameters using SYSGEN
Run SYSGEN
RUN SYS$SYSTEM:SYSGEN
SYSGEN: Modify parameter
And (example):
SYSGEN> USE ACTIVE SYSGEN> SET GBLPAGES 100000 SYSGEN> WRITE ACTIVE SYSGEN> EXIT
SYSGEN: List all parameters
SHOW /ALL
empty
openvms/openvms-cheatsheet.1688022736.txt.gz · Last modified: 2023/06/29 07:12 by dodger