Vax 613 0S Instruction Manual download pdf (Page 24)

MDP

APPLICATIONS

Issue 3 - Vol 2

USER

GROUP

NEWS

about

"/ete/update"

and"

/etc/cron").

"/ete/rc"

will also

"mount"

any additional

hard

disks for

you

(something like -

"/ete/mount

/dev/hdl

/usrl").

"/etc/init"

will

make

multiple copies

of

itself;

one"

/etc/

init" for every

tty

device. This is done by reading

the"

/etc/ttys".

The

first column contains

either

a 1

or

o.

The

1 means

the

tty

device is a "login" port.

The

0 means

the

tty

device

is

not

a "login"

port

and

therefore do

not

spawn

an

"/ete/init"

for

that

tty

device.

The"

/etc/init"

is

what

controls eaeh

port

on

the 8560/61.

The

second column in

"/etc/ttys"

will be used by

"/etc/getty"

for

the

default

terminal

speed

(see:

8560 System Reference Manual, section 8, on

the"

getty" process).

6)

"/etc/getty"

sets

the

default

terminal

speed used

and

sends

the

"Login: " message

to

the terminal.

At

this

point, the user

enters

a correct user

name

(or incorrect if you like) and if there is one,

will

prompt

for

the

password. Should there exist a Message

Of

The

Day (MOTD),

the

file"

/etc/motd"

is

sent

to

the

terminal.

MOTD

is

good for

broadcasting

messages

of

general interest

to

all users.

The

login process

will

invoke

the

program"

/bin/sh".

This

is

the program

that

allows

TNIX

the machine

to

work with

YOU

the

human.

The

"shell" program can do many things for

the

user

and

I suggest one read

the

8560 System User Manual, sec-

tion 5 for more inCormation. Next the

file"

/etc/profile"

is executed.

This

file, should

it

exist,

is

good for

issuing

commands

to

every user who logs in

to

the

8560.

It

might, for example,

print

the"

date" for every

one who logs into the

8560. Once

the"

/etc/profile"

has completed,

the"

/usr/usernamej.profile"

is exe-

cuted. Every user may have their own profile

command

file

to

customize

the

system

to

their

needs.

".profile" might

contain

commands

to

program a terminal for special uses.

Others

might

have

it

print

all

the

current

users on

the

system.

Doug Roberts, Washington,

D.C. Field Office

DELAYED

EXECUTION

OF

COMMANDS

One of the 856x's more useful features is the ability

to

do tasks

at

some later time, usually

in

the middle of

the

night. This is generally accomplished by the use of the

'at'

command

(part

of

the

Auxiliary Utilities Package).

Users may find it difficult

to

keep

track

of all the different jobs. Use a

command

file

(/usr/byronl/.later)

to

put

all

"later"

tasks

into a single place:

20

:

this

file

executes every day

at

5

AM

under

control of

at

set

'date'

:

the

following

commands

are executed every day

cp

SHOME/calendar

$HOME/cal.backup

case

$1

in

Sat)

Sun}

uucp

/usr

/byronl/logfile

red!/public/logfile;;

cd

/usr

/spool/uucp

cp

LOGFILE

.LOGFILE

cp SYSLOG .SYSLOG

>LOGFILE

>SYSLOG;;

Mon) echo

"S~nd

Status

Report

Today"

Imail byronl;;

esac

sleep

360

Tue};;

Wed};;

Thu);;

Fri};;

TEKTRONIX

December Ig83

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