[CALUG] init OR telini Q/q

[Rajiv Gunja]

Dave,
You made me look up a book!! Here is another look at Q/q

Source: Essential System Administration 3rd Edition. This is an exact "cut &
paste" from the book and I have not edited it.


Table 4-2. System V-style run levels

Run Level

Name and customary purpose

0

Halted state: conditions under which it is safe to turn off the power.

1

System administration/maintenance state.

S *and* s

Single-user mode.

2

Multiuser mode: the normal operating state for isolated, non-networked
systems or networked, non-server systems, depending on the version of Unix.

3

Remote file sharing state: the normal operating state for server systems on
networks that share their local resources with other systems (irrespective
of whether networking and resource sharing occurs via TCP/IP and NFS or some
other protocol).

4, 7, 8, 9

Administrator-definable system states: a generally unused run level, which
can be set up and defined locally.

5

Same as run level 3 but running a graphical login program on the system
console (e.g., xdm).

6

Shutdown and reboot state: used to reboot the system from some running state
(s, 2, 3, or 4). Moving to this state causes the system to be taken down (to
run level 0) and then immediately rebooted back to its normal operating
state.

Q *and* q

A pseudo-state that tells init to reread its configuration file */etc/
inittab*.

a, b, c

Pseudo-run levels that can be defined locally. When invoked, they
cause initto run the commands in
*/etc/inittab* corresponding to them without changing the current (numeric)
run level.


Table 4-3. Run levels defined by various operating systems

AIX

HP-UX

Linux

Tru64

Solaris

Default run level

2

3

3 or 5

3

3

Q

yes

yes

yes

yes

yes

7, 8, 9

yes

no

yes

yes

no

a, b, c

yes

yes

yes

no

yes


-- 

Rajiv G Gunja
System Analyst / Engg
SUN / AIX / HPUX / Linux Admin
IM: AOL / Yahoo / MSN : ggvrsn
Skype: rajiv_gunja
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