Tag: Linkedin Osama Mustafa

Configure Linux NFS File System

Posted on by Osama Mustafa in Operating system
NFS : Network File System

Before Start Configure NFS you have to Understand When to use it ? and What is it ?

NFS file system usually read from Source Called Server , If this server goes down, it will not be available for the other resource, From this we understand that i should configure NFS On both Side Server and Client.

Read More About it Here.

Note : 

Server IP : 192.168.1.100
Client IP : 192.168.1.101

In this Blog I will Use NFSV4 

1- You need to install two Package ( as root user )
**nfs-ultis-lib
**portmap ( if you are asking nfs4 this is not needed anymore )

2-  As Root Run the below Command to Start nfs Serivces :

[root@TEST share]# /etc/init.d/nfs start
Starting NFS services:                                     [  OK  ]
Starting NFS quotas:                                       [  OK  ]
Starting NFS mountd:                                      [  OK  ]
Stopping RPC idmapd:                                    [  OK  ]
Starting RPC idmapd:                                      [  OK  ]
Starting NFS daemon:                                     [  OK  ]

3- Create folder under /u01/app/shared , give permission to oracle and chmod 775 
4- on NFS Server ( you will own the folder ) , vi /etc/exports add the below line :

/u01/app/shared [Client-IP] (rw,sync,no_root_squash) 

5- NFS Server is done , Go to NFS Client ( Node 2 )  as root user run the below command :

#/etc/init.d/nfs start
#showmount -e 192.168.1.101

The Output Will be like the below :

Export list for 192.168.1.100:
/u01/app/shared 192.168.1.101

6-On Node 2 ( As Root User ) –> #  mount -t nfs 192.168.1.100:/u01/app/shared/ /u01/app/shared/
7- Check using df -h 

**Remove:-

8- umount /u01/app/shared ( on Node 2 ) 

Important Command :
showmount -e : Shows the available shares on your local machine
exportfs -v : Displays a list of shares files and options on a server

Thank you
Osama Mustafa

WorkFlowCA: NullError : Could not Connect to the Remote Server

Posted on by Osama Mustafa in Application

This Error Appear When Trying to Run Oracle Ware-House Builder On Linux , in this tools you are connecting to Database to Setup some configuration for Workflow in DWH, Every Thing Run Successfully Till i received the error in the picture :

WorkFlowCA: NullError : Could not Connect to the Remote Server

You Can ignore this error simply , I didn’t configure Oracle Enterprise manager in my database , which is the reason for this Error.if you want create enterprise manager and re run the tool again.

Thank you
Osama Mustafa 

Connection refused; No available router to destination On Weblogic Node Manager Log

Posted on by Osama Mustafa in Fusion Middleware

Caused by: java.net.ConnectException: t3://exalytic.domain:8001: Destination unreachable; nested exception is:

The Above Error Appear when i was trying to access BPM, the main Cause for this error there’s no configuration protocol on SOA Server Which mean No Listening Host.

To Avoid and Solve this error Follow the below Steps :

  • Access to weblogic Console using Administrator Password.
  • Click on Servers -> Protocols -> Channels like the below screen
  • Now you have to create new Protocol Click on “Configure a new Network Channel,”with the below confguration 

Name: Loopback
Protocol: t3
Listen Address: localhost
Listen Port: 8001 (same as Server Host/port)

  • Restart The Server and test the connection Again 

Thank you
Osama Mustafa

Steps To Create ODBC Connection in Linux

Posted on by Osama Mustafa in Articles, Operating system


In this Document i will describe how to create ODBC Connection in Linux Step by Step. I uploaded my document to slideshare as usual you can download it from here.

Thanks for my friend Ilmar Kerm . 

Thank you 
Osama mustafa 

Steps to Create Linux Container

Posted on by Osama Mustafa in DevOps Tools
After my last post about Docker Project, i start testing Linux Container but this time for lxc which is another amazing Package and should be used, if you installed and follow my steps in Previous steps here  then you can use lxc command without any suffer of installation 🙂

lxc stand for Linux Container.

Now i will start to describe how to create container using this command 

  • You need to know when lxc installed, it’s create file under /etc/lxc/ called default.conf this file should contain your network interface name and you need to add it.

[root@OEL6 ~]# cat /etc/lxc/default.conf
lxc.network.type = veth
lxc.network.link = docker0
lxc.network.flags = up

Sample output for ifconfig command :

docker0   Link encap:Ethernet  HWaddr 00:00:00:00:00:00
          inet addr:172.17.42.1  Bcast:0.0.0.0  Mask:255.255.0.0
          inet6 addr: fe80::28ce:eeff:fe80:1fc8/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:17 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1112 (1.0 KiB)  TX bytes:408 (408.0 b)

I used docker0 Interface because i already installed it , and configure the IP Address, if you don’t modify this file when you start container you will receive error :

[root@OEL6 container]# lxc-start –name test-container
lxc-start: failed to attach ‘vethaITNmu’ to the bridge ‘virbr0’ : No such device
lxc-start: failed to create netdev
lxc-start: failed to create the network
lxc-start: failed to spawn ‘test-container’

Anyway now after add the file with the right Interface name, you will be able to run and start working on lxc just follow the below steps :
  • Before Create any container you need to create Directory under /, if you don’t do this step another error will be appeared asking for this directory and telling you /container not found.

mkdir /container will solve the problem.

Now Let’s Start Creating new container called Test-container :

[root@OEL6 lxc]# lxc-create -n test-container -t oracle — -R 6.5

lxc-create: No config file specified, using the default config /etc/lxc/default.conf
Host is OracleServer 6.5
Create configuration file /container/test-container/config
Downloading release 6.5 for x86_64
Loaded plugins: refresh-packagekit, security
ol6_u5_base                                                     | 1.4 kB     00:00
ol6_u5_base/primary                                             | 3.2 MB     00:32
ol6_u5_base                                                                  8573/8573
Setting up Install Process

the above command will take some while to finish the configuration, it’s installing some packages needed by container you can have more than one container with different name.
After the creation is done you should be notice the below line :

Complete!
Rebuilding rpm database
Configuring container for Oracle Linux 6.5
Added container user:oracle password:oracle
Added container user:root password:root
Container : /container/test-container/rootfs
Config    : /container/test-container/config
Network   : eth0 (veth) on virbr0
‘oracle’ template installed
‘test-container’ created

the container is not started yet !!! so we need to do this using the below command :

[root@OEL6 lxc]# lxc-start -n test-container
                Welcome to Oracle Linux Server
Setting hostname test-container:                        [  OK  ]
Checking filesystems
                                                                        [  OK  ]
Mounting local filesystems:                                [  OK  ]
No such file or directory
Enabling /etc/fstab swaps:                                 [  OK  ]
Entering non-interactive startup
Bringing up loopback interface:                         [  OK  ]
Bringing up interface eth0:
Determining IP information for eth0… failed.
                                                                      [FAILED]
Starting system logger:                                    [  OK  ]
Mounting filesystems:                                      [  OK  ]
Generating SSH1 RSA host key: No such file or directory
                                                                      [  OK  ]
Generating SSH2 RSA host key: No such file or directory
                                                                     [  OK  ]
Generating SSH2 DSA host key: No such file or directory
                                                                     [  OK  ]
Starting sshd:                                                 [  OK  ]
Oracle Linux Server release 6.5
Kernel 3.8.13-16.2.1.el6uek.x86_64 on an x86_64
test-container login:

I will fix FAILED Later now you need to connect to the container using the above User name and password given to you in the above line.
After this 
[root@test-container ~]#
I am connected 🙂 

You can delete the container using command 

lxc-destroy -n test-container  

Reference :
1- Oracle Linux containers Here 
2- Oracle Linux 6.5 and Docker Here

Thank you
Osama mustafa

Enable Docker On Linux

Posted on by Osama Mustafa in DevOps Tools
Oracle Linux Released Before 2 week, i already blogged about this and mean while i was testing new features for Oracle Linux 6.5 which is simply amazing i will start writing about it.

Enable Docker , What is the Docker you can check the official Website to take look what i mean by Docker here .

If you tried to install Docker Directly you will get the below error :

[root@OEL6 u01]# rpm -ivh docker-io-0.7.0-14.el6.x86_64.rpm

warning: docker-io-0.7.0-14.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 0608b895: NOKEY
error: Failed dependencies:
lxc is needed by docker-io-0.7.0-14.el6.x86_64

and if you need to install lxc package :

[root@OEL6 Packages]# rpm -ivh lxc-0.9.0-2.0.5.el6.x86_64.rpm 

warning: lxc-0.9.0-2.0.5.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
error: Failed dependencies:
libvirt is needed by lxc-0.9.0-2.0.5.el6.x86_64

So Let’s Start :

root@OEL6 Packages]# rpm -ivh libvirt-0.10.2-29.0.1.el6.x86_64.rpm 

warning: libvirt-0.10.2-29.0.1.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
error: Failed dependencies:
/usr/bin/qemu-img is needed by libvirt-0.10.2-29.0.1.el6.x86_64
ebtables is needed by libvirt-0.10.2-29.0.1.el6.x86_64
libnetcf.so.1()(64bit) is needed by libvirt-0.10.2-29.0.1.el6.x86_64
libnetcf.so.1(NETCF_1.0.0)(64bit) is needed by libvirt-0.10.2-29.0.1.el6.x86_64
libnetcf.so.1(NETCF_1.2.0)(64bit) is needed by libvirt-0.10.2-29.0.1.el6.x86_64
libnetcf.so.1(NETCF_1.3.0)(64bit) is needed by libvirt-0.10.2-29.0.1.el6.x86_64
libnetcf.so.1(NETCF_1.4.0)(64bit) is needed by libvirt-0.10.2-29.0.1.el6.x86_64
lzop is needed by libvirt-0.10.2-29.0.1.el6.x86_64
numad is needed by libvirt-0.10.2-29.0.1.el6.x86_64
radvd is needed by libvirt-0.10.2-29.0.1.el6.x86_64

First:

[root@OEL6 Packages]# rpm -ivh lzo

lzo-2.03-3.1.el6.x86_64.rpm       lzop-1.02-0.9.rc1.el6.x86_64.rpm
[root@OEL6 Packages]# rpm -ivh lzop-1.02-0.9.rc1.el6.x86_64.rpm 
warning: lzop-1.02-0.9.rc1.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
Preparing…                ########################################### [100%]
   1:lzop                   ########################################### [100%]

Second :

[root@OEL6 Packages]# rpm -ivh numa

numactl-2.0.7-8.el6.i686.rpm
numactl-2.0.7-8.el6.x86_64.rpm
numactl-devel-2.0.7-8.el6.i686.rpm
numactl-devel-2.0.7-8.el6.x86_64.rpm
numad-0.5-9.20130814git.el6.x86_64.rpm

[root@OEL6 Packages]# rpm -ivh numad-0.5-9.20130814git.el6.x86_64.rpm 

warning: numad-0.5-9.20130814git.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
Preparing…                ########################################### [100%]
   1:numad                  ########################################### [100%]

Third:
[root@OEL6 Packages]# rpm -ivh radvd-1.6-1.el6.x86_64.rpm 
warning: radvd-1.6-1.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
Preparing…                ########################################### [100%]
   1:radvd                  ########################################### [100%]
Fourth :

[root@OEL6 Packages]# rpm -ivh augeas-libs-1.0.0-5.el6.x86_64.rpm
warning: augeas-libs-1.0.0-5.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
Preparing…                ########################################### [100%]
   1:augeas-libs            ########################################### [100%]

[root@OEL6 Packages]# rpm -ivh netcf-libs-0.1.9-4.el6.x86_64.rpm
warning: netcf-libs-0.1.9-4.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
Preparing…                ########################################### [100%]
   1:netcf-libs             ########################################### [100%]

Now you need to enable qemu-img like the below :

[root@OEL6 Packages]# rpm -ivh libgfortran-4.4.7-4.el6.x86_64.rpm
warning: libgfortran-4.4.7-4.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key                                                                              ID ec551f03: NOKEY
Preparing…                ########################################### [100%]
        package libgfortran-4.4.7-4.el6.x86_64 is already installed

[root@OEL6 Packages]# rpm -ivh qemu-img-0.12.1.2-2.415.el6.x86_64.rpm
warning: qemu-img-0.12.1.2-2.415.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature,                                                                              key ID ec551f03: NOKEY
error: Failed dependencies:
        libgfapi.so.0()(64bit) is needed by qemu-img-2:0.12.1.2-2.415.el6.x86_64
        libusbredirparser.so.1()(64bit) is needed by qemu-img-2:0.12.1.2-2.415.e                                                                             l6.x86_64
[root@OEL6 Packages]# rpm -ivh glusterfs-api-3.4.0.36rhs-1.0.1.el6.x86_64.rpm
warning: glusterfs-api-3.4.0.36rhs-1.0.1.el6.x86_64.rpm: Header V3 RSA/SHA256 Si                                                                             gnature, key ID ec551f03: NOKEY
Preparing…                ########################################### [100%]
   1:glusterfs-api          ########################################### [100%]
[root@OEL6 Packages]# rpm -ivh qemu-img-0.12.1.2-2.415.el6.x86_64.rpm
warning: qemu-img-0.12.1.2-2.415.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature,                                                                              key ID ec551f03: NOKEY
error: Failed dependencies:
        libusbredirparser.so.1()(64bit) is needed by qemu-img-2:0.12.1.2-2.415.e                                                                             l6.x86_64
[root@OEL6 Packages]# rpm -ivh usbredir-0.5.1-1.el6.x86_64.rpm
warning: usbredir-0.5.1-1.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, ke ID                                                                              ec551f03: NOKEY
Preparing…                ########################################### [100%]
   1:usbredir               ########################################### [100%]

[root@OEL6 Packages]# rpm -ivh qemu-img-0.12.1.2-2.415.el6.x86_64.rpm
warning: qemu-img-0.12.1.2-2.415.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature,                                                                              key ID ec551f03: NOKEY
Preparing…                ########################################### [100%]
   1:qemu-img               ########################################### [100%]

Finally the last Package :

[root@OEL6 Packages]# rpm -ivh ebtables-2.0.9-6.el6.x86_64.rpm
warning: ebtables-2.0.9-6.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
Preparing…                ########################################### [100%]
   1:ebtables               ########################################### [100%]

[root@OEL6 Packages]# rpm -ivh libvirt-0.10.2-29.0.1.el6.x86_64.rpm

warning: libvirt-0.10.2-29.0.1.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
Preparing…                ########################################### [100%]
   1:libvirt                ########################################### [100%]

we have to download two more package 

[root@OEL6 Packages]# rpm -ivh lxc-0.9.0-2.0.5.el6.x86_64.rpm

warning: lxc-0.9.0-2.0.5.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
Preparing…                ########################################### [100%]
   1:lxc                    ########################################### [100%]

[root@OEL6 u01]# rpm -ivh docker-io-0.7.0-14.el6.x86_64.rpm
warning: docker-io-0.7.0-14.el6.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 0608b895: NOKEY
Preparing…                ########################################### [100%]
   1:docker-io              ########################################### [100%]

Now you Can Use Docker 🙂 I will post more blog about this Package and how to use.
Thank you 
Osama Mustafa

Oracle Linux 6.5 released

Posted on by Osama Mustafa in Operating system
Oracle Announced the release of Oracle Linux 6.5, The Latest Version Of Oracle Linux, It’s only Other Operating System Because this version Contain Some New Features :

  • Unbreakable Enterprise Kernel Release 3
  • Support DTrace.
  • Delivering Better Performance, scalability   and reliability For Companies.
  • New File System : btrfs enable administrators to implement an efficient incremental backup mechanism using file system snapshots.
And More Features.
You Can download Oracle Linux 6.5 Here
It will be Available soon On Oracle Software Delivery Here