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