SunOS5.8 is a radical departure from SunOs4.X in many ways. one of the important differences is the handling of devices. Adding devices under SunOS4.x required a kernel reconfiguration, recompliation and reboot. Under SunOS5.X, this has changed with the ability to add some drivers on the fly.... (1 Reply)
One cool thing about unix is that it predicts disk blocks that you may need and tries to have them in core before you need them. Over the years, various unix vendors tried various algorithms to improve performance. HP has patented their latest algorithm...
Multi-threaded Read Ahead Prediction... (0 Replies)
Hi all,
I am trying to boot a an OS from RAM...(its a opensolaris based distro)
For this i have picked up 2 key lib files that when copied to /tmp and mounted to respective places will do the job..
The sizes of these files combined comes upto 600mb.(i have 2gb ram)
Now i have also located the... (0 Replies)
I want to check process status at regular interval of time ...
so i ha wirtten this BUT its not working when i placed this peace of code in .sh ..
please help me out
#!/bin/sh
w = ps -ef|grep processname | wc - l
echo $w
if ; then
Banner "Proceesname Problem"
else
Banner " Running... (5 Replies)
I would like to search a router config file for "ip address $ip", once found, I want to grab the line just before that contains "interface $interfacetype"
basically saying, 10.3.127.9 is assigned to "Loopback1" given the below as an example.
interface Loopback1
ip address 10.3.127.9... (1 Reply)
Hi Guys,
I wonder if after enabling CIO/DIO at the filesystem level and assuming that CIO/DIO will bypass the JFS2 read ahead available when not using CIO/DIO my questionis what parameters I can play with to tune/improve the CIO in order to obtain similar performance for sequential reads (... (7 Replies)
Hey!
I'm working on a script that will add a user, create some configfiles, and add a crontab for the user.
The crontab looks like the following:
@reboot /home/user/program config.conf &
I would like for this process to start at the end of my script under the corresponding username by... (0 Replies)
Time on unix server shows 8:00a CST
Time on Windows 7 Box shows 8:00a CST
However when you access an NFS share the time stamp on the files show an hour ahead? Talking about a newly created file shows an hour ahead so at 8:00a the file will show a time stamp of 9:00a CST
the problem it... (1 Reply)
Hi,
I have a code that will show one day ahead, how to make it show two days ahead
p-dev1-db-tst:/$ day=$(TZ=IST-24 date +%d)
p-dev1-db-tst:/$ echo $day
17
p-dev1-db-tst:/$
Regards, Adam (5 Replies)
Discussion started by: answer
5 Replies
LEARN ABOUT OPENSOLARIS
let
let(1) User Commands let(1)NAME
let - shell built-in function to evaluate one or more arithmetic expressions
SYNOPSIS
ksh
let arg...
ksh93
let [expr...]
DESCRIPTION
ksh
Each arg is a separate arithmetic expression to be evaluated.
ksh93
let evaluates each expr in the current shell environment as an arithmetic expression using ANSI C syntax. Variables names are shell vari-
ables and they are recursively evaluated as arithmetic expressions to get numerical values. let has been made obsolete by the ((...)) syn-
tax of ksh93(1) which does not require quoting of the operators to pass them as command arguments.
EXIT STATUS
ksh
ksh returns the following exit values:
0 The value of the last expression is non-zero.
1 The value of the last expression is zero.
ksh93
ksh93 returns the following exit values:
0 The last expr evaluates to a non-zero value.
>0 The last expr evaluates to 0 or an error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO ksh(1), ksh93(1), set(1), typeset(1), attributes(5)SunOS 5.11 2 Nov 2007 let(1)