We help IT Professionals succeed at work.

Check out our new AWS podcast with Certified Expert, Phil Phillips! Listen to "How to Execute a Seamless AWS Migration" on EE or on your favorite podcast platform. Listen Now

x

Enviroment

jccp
jccp asked
on
Medium Priority
298 Views
Last Modified: 2010-04-21
In a SYSVr4 environment, what is the command you would use to bring the host to single user mode?

What do the different levels(0-9) refer to in dump/restore?

What is the difference between a SCSI-2 fast wide and a SCSI-2 fast wide differential bus?

What is the difference between RAID Level 3 and RAID Level 5?

Most system level scripts are written in the bourne shell, why?

What is the difference between a "su - <user>" and an "su <user>" command?


I was told to answer these questions by any means neccessary
so any of them that you could answer would help me out alot.
Comment
Watch Question

Commented:
Is this your computer class homework ??

Author

Commented:
Edited text of question
Unlock this solution and get a sample of our free trial.
(No credit card required)
UNLOCK SOLUTION
1.   init s
     init S
     or
          shutdown -iS -g0 -y

2.   level 0 is a full backup
     levels 1-9 are incremental backups
     (incremental backups backup to most recent backup at lower level)

3.   Differential signalling enables you to increase the cable length, by
     generating two electrical signals, where one is the inverse of the other
     instead of a single electrical signal

4.   RAID 3 -- disk striping with a single parity disk
     RAID 5 -- disk striping with parity split over multiple discs

5.   Sometimes the only shell available will be the bourne shell
     (when in system maintenance after failed boot)

6.   su - <user> inherits <user> environment (sources users shell control files etc)
     su <user> does not inherit <user> environment

pretty much as ahoffmans answer!
gormenghast,
3. and 4.  not bad
6. if someone knows about real vs. effective UIDs, (s)he would
   get used to the environment difference too ;-)
Unlock the solution to this question.
Thanks for using Experts Exchange.

Please provide your email to receive a sample view!

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.