How to change /var/log/messages permission in Linux

Add below lines in /etc/logrotate.d/syslog

[root@test001 log]# cat /etc/logrotate.d/syslog

/var/log/messages /var/log/secure /var/log/maillog /var/log/spooler /var/log/boot.log /var/log/cron {

create 0644 root root

rotate 6

weekly

    sharedscripts

    postrotate

/etc/init.d/syslog reload

    endscript

}

[root@test001 log]# cat /etc/cron.daily/logrotate

#!/bin/sh

/usr/sbin/logrotate --force /etc/logrotate.conf

EXITVALUE=$?

if [ $EXITVALUE != 0 ]; then

    /usr/bin/logger -t logrotate "ALERT exited abnormally with [$EXITVALUE]"

fi

exit 0

Network configuration in Oracle VM Manager

 Click on Networking --> VLAN Interfaces --> serverpool --> ovm server -- click on "+"

Select NIC card  --> Next

Enter VLAN ID RANGE --> Next

 After finsh--> Once job got completed-->Click on Network -->create a Local Network on a single server

Select server --> click on finish

VMs appear as "ORPHAN" error

Error VMs appear as "ORPHAN".

Solution

1. Repositories -> Refresh

2. Server -> Rescan Physical Disks

3. Server -> Rediscover Server

Oracle VM Server 3.3 installation steps

Download Oracle VM server software iso and then upload it vmware or server hardware through console.

Oracle VM Manager 3.3 installation steps

For installing oracle virtual manager download below zip file from oracle site

 mount iso image on /mnt

Run createOracle.sh command checking and adding prerequisites on host

 Run installer  from /mnt

Enter admin password (weblogic,oracle,ovs-agent)

Please enter IP address of host and then continue

In 3.3 https is default
After successfully installed you will see Oracle VM Manager UI .Open browser and enter https://vmgrtest:7002/ovm/console

How to discover ORACLE VM server on different ORACLE VM

Go to /etc/ovs-agent directory and remove existing db directory

Restart ovs-agent services

Go to new vmanager and click on discover server and enter VM agent password and VM server IP

Check the status in Navigation window

may contain holes - can't swap on it

Error

root@test001# mkfile 5G swap1
root@test001# swap -a /test/app02/swap1
"/test/app02/swap1" may contain holes - can't swap on it.

Solution

root@test001# zfs create -V 5G -b 8k newpool/swap1
root@test001# swap -a /dev/zvol/dsk/newpool/swap1

zfs swap: Too fragmented in solaris

Error

root@test001# zfs create -V 5G newpool/swap1
root@test001# swap -a /dev/zvol/dsk/newpool/swap1
/dev/zvol/dsk/newpool/swap1 : Too fragmented

Solution

root@test001# zfs create -V 5G -b 8k newpool/swap1

root@test001# swap -a /dev/zvol/dsk/newpool/swap1 

How to update Firmware on T-series server from OPS CENTER 12C

Note: Server will reboot while updating firmware.

Go to plan management and select Update firmaware

Click on create profile and select latest downloaded firmware

Click on apply deployment plan

Select Server (it should added asset as a server hardware while adding asset( ILOM , ELOM , ALOM or RSC) )

Schedule now or later time and click on apply

How to install Oracle Enterprise Manager Ops Center 12c

Pre requirements

Download Ops Center 12c from below link

http://www.oracle.com/technetwork/oem/ops-center/oem-ops-center-188778.html

Download OCDoctor--latest.zip
unzip and the run below command

cd OCDoctor./OCDoctor.sh --ec-prereq

Unzip and untar the enterprise-controller

 

Download below 2 file from oracle and copy into /var/tmp/download directory

 Swap minimum should be  equal to RAM size

/usr/bin/ulimit -n is 256, needs 65536

/var/opt should be more than 100GB

Installation steps:

Go to downloaded XVM bundle directory and then run ./install

After completed installation open below link from browser

Complete below steps after login into ops center 12c first time

Add new asset into ops center 12c

Click on Add Assets

Click on create profile

Enter Name and select Asset Type

Add Name and IP Ranges (you can add multiple host IP's separate it by comma(,))

Select SSH and click on New

Click on Create and then Next

Click on Finish

Add same IP's and click on Add Now



Check job in jobs bar