Oracle Linux 6 Login

Hi
I installed oracle linux 6 in my machine. After installation, linux is asking user name password. I specified the same password at time of installation, but i dont know the username.
Anyone know, using which account I get into login?

If you expect a graphical interface you will need to install it. If you are not experienced than I think your best option will be to reinstall the OS, select the "Customize now" button and add the Desktop packages such as X-windows and Gnome desktop.

Similar Messages

  • Oracle linux  login

    hi i am new to oracle on linux........
    i just performed the installation of oracle 10gR2 on linux 5
    but now how i work on terminal...just like windows we set oracle_sid=ora, C:/ sqlplus/nolog
    is there something that must be set before to work on database................
    as i have done the installation as user oracle, is this user needed further to work on database or just root user is enough?
    thanks & regards
    girish

    Pavan - a DBA wrote:
    link is wonderful...thanks for providing...
    but OP told he already done with installation and about to work and asking how to work in terminal....Its also avialable on this blog.How to set path enviornment and like.

  • Oracle Linux Exam Help!

    Hello!
    I will kindly ask for your honest opinions as I want to study for an Oracle Linux exam and I need to get the below indicated topics covered, but unfortunately I could not find a book to cover them all (as I did for Oracle 11g).
    Please help me locate a book, two or how many are necessary to help me study for the exam and cover the following topics:
    Thank you all!
    Installing Enterprise Linux
    Install Enterprise Linux on any supported architecture.
    Create partitions, software RAID and LVM storage configurations.
    Select Packages for Installation.
      PC Hardware & Linux
    Get detailed information about all PCI & USB devices that are connected to a Linux system
    Identify, load, unload and configure kernel modules
    Tune the running kernel using the /proc/ filesystem
      Post-Install System Configuration
    Set and maintain the system clock with date, hwclock and NTP
    Install, update and remove RPM packages with the rpm & yum commands
    Configure printers with CUPS
    Create and use Kickstart files for automated, hands-off installations
      Boot Process & SysV Init
    Configure the GRUB boot loader
    Manage SysV Init scripts, including customizing files under the /etc/sysconfig/ directory to tune SysV Init scripts
    Configure and use SysV runlevels
    Shutdown & reboot Linux systems
      User/Group Administration and NFS
    Describe and apply the User Private Group scheme
    Create, delete and configure user and system accounts
    Create, delete and configure groups
    Customize the PAM configuration
    Configure and control access to su and sudo
    Configure Linux systems to use centralized authentication and user information stores for system logins
    Implement a file server to share files with NFS v3 & v4
    Configure the automounter (autofs) allowing un-privileged users to mount filesystems on-demand
      Filesystem Administration
    Work with device nodes and udev
    Partition hard drives after installation
    Create and tune filesystems
    Mount filesystem, including persistent configuration in the /etc/fstab file
    Create, manage and tune swap devices
    Configure, manage, assign and maintain quotas on filesystems
    Create, use and remove File Access Control Lists (FACLs)
      LVM & Raid
    Configure Logical Volume Manager volume groups and logical volumes
    Create and use software RAID devices
    Grow and shrink logical volumes and the filesystems on them
    Use LVM snapshots to create consistent, reliable backups
      Task Automation & Process Accounting
    Use the at & batch facilities to run one-time tasks
    Manage cron jobs for recurring tasks, both system-wide and per-user
    Configure syslog for central system logging
    View, manage and kill running processes
    Monitor system and application logs on a daily basis with logwatch
    Configure process accounting and examine the resulting logs
    Limiting and measuring resource usage (ulimit, pam, sar, vmstat, iostat)
      Client Networking
    Configure TCP/IP networking on Linux systems
    Configure static routing on a Linux system
    Aggregate multiple network links into a single interface via the bonding driver's Etherchannel and 802.3ad support
    Configure a Linux system to participate in multiple VLANs on a managed switch via 802.1q frame tagging
    Configure and maintain a DHCP server
    Using networking diagnostics tool (ping,arp,ethtool)
    Enterprise Linux Fundamentals
    What is Linux?
    Identify the origins of UNIX and how Linux is related to UNIX
    Describe the major goals of the Free Software Foundation and the GNU project
    List key elements of a Linux distribution and name several distributions
    List several standards that apply to Linux
    Describe the basic mechanisms that make UNIX so powerful
      Multi User Concepts
    Describe the differences between the administrative (root) user and normal user accounts and explain when each should be used
    Log into the system
    Switch between accounts using the 'su' command
    Use basic commands to gather information about the system
    Use system help facilities to learn about commands and their options.
      The Linux File System
    List the standard system directories and explain what type of files are contained in each
    Navigate the file system
    Explain standard POSIX file permissions including special permissions such as the SUID, SGID and Sticky bits on both files and directories
    Change permissions of files
    Explain how file ownership (user: group) relates to file permissions
    Change ownership of files
    Describe how the User Private Group (UPG) scheme works and the problem it solves
      Manipulating Files
    Be able to create, delete, copy, move and rename files and directories
    Describe the various types of files that can be stored on UNIX and Linux file systems
    Explain hard links and symbolic links, their pros & cons and when & where they can or can not be used
    Identify the type of content of any file
    View the contents of both text-based and binary files
    Search the file system for files and directories with specific properties
      Text Processing
    Search inside of files for specified information
    Perform file editing, sorting, cutting & merging text files from the command linee
      Shell Basics
    Understand the varied roles the command shell plays in everyday UNIX/Linux usage
    Pipe several commands together to perform more complex and useful processing
    Use file redirection on the command line
    Create and use shell and environment variables to configure and control the operation of the system, the command shell and programs
    Use and escape special characters when they are used on the command line
      Regular Expressions Construct regular expressions for matching text patterns
    Archiving and Compression
    Use tar & cpio to create archives and extract files from them
    Compress and decompress files using the UNIX compress, GNU gzip, bzip2 and zip formats
      Text Editing
    Use simple text editors like pico and nano
    Perform basic and intermediate text editing functions efficiently with vi & Vim
    Perform basic and intermediate text editing functions with GNU Emacs
      Command Shells
    List the history and relationships of the various popular shell implementations available on UNIX and Linux systems
    Identify and switch between the various shell implementations
    Customize the command prompt on Bourne and BASH shells
    Use command line history, command completion, aliases and command line editing
    Customize command shell operation system wide and for individual users
      Introduction to Shell Scripting
    Process arguments passed into a shell script
    Get input from the user of a shell script
    Generate formatted output from a shell script
    Perform tasks conditionally using if, case and while loops in a shell script
    Perform repeated actions over a set of values with for loops on the command line and within shell scripts
    Do math in a shell script
      Process Management and Job Control
    Describe the differences between process and threads
    Find and control running programs with ps, top, kill, and nice
    Use the jobs, fg and bg commands to view and access several tasks at once on a single shell
    Use the screen command to run several programs and disconnect from running programs on remote systems
      Messaging
    Send local messages with the write and wall commands
    Use talk and ytalk to chat with other users
    Send and read email with the mail and pine commands
      The Secure Shell
    Configure the ssh client and sshd server programs securely
    Establish secure, remote connections to other systems
    Use SSH's key-based authentication
      Managing Software
    Find and download software via FTP & HTTP with text & graphical client programs like wget, lftp, links, Konqueror and Mozilla Firefox
    Install binary programs in RPM packages
    List software already installed on the system with RPM
    Compile and install software from source releases
    Compile and install software from a source RPM (SRPM or .src.rpm) package
      Printing
    Use CUPS to connect to available local and network printers
    Use various commands to process and convert files in preparation for printing
    Send jobs to a printer
    Monitor and remove print jobs
      Mounting FileSystems and Managing Removable Media
    Use the mount command
    Access NFS and SMB filesystems over the network
    Use autofs for on-demand mounting of filesystems without root privileges
      X Window System
    Start the graphical environment manually
    Select different desktop environments
    Launch graphical applications
    Use Linux as an X terminal
    Customize the graphical environment and auto-start applications at login and X startup
    Securely tunnel remote graphical applications through SSH

    Hello!
    I will kindly ask for your honest opinions as I want to study for an Oracle Linux exam and I need to get the below indicated topics covered, but unfortunately I could not find a book to cover them all (as I did for Oracle 11g).
    Please help me locate a book, two or how many are necessary to help me study for the exam and cover the following topics:
    Thank you all!
    Installing Enterprise Linux
    Install Enterprise Linux on any supported architecture.
    Create partitions, software RAID and LVM storage configurations.
    Select Packages for Installation.
      PC Hardware & Linux
    Get detailed information about all PCI & USB devices that are connected to a Linux system
    Identify, load, unload and configure kernel modules
    Tune the running kernel using the /proc/ filesystem
      Post-Install System Configuration
    Set and maintain the system clock with date, hwclock and NTP
    Install, update and remove RPM packages with the rpm & yum commands
    Configure printers with CUPS
    Create and use Kickstart files for automated, hands-off installations
      Boot Process & SysV Init
    Configure the GRUB boot loader
    Manage SysV Init scripts, including customizing files under the /etc/sysconfig/ directory to tune SysV Init scripts
    Configure and use SysV runlevels
    Shutdown & reboot Linux systems
      User/Group Administration and NFS
    Describe and apply the User Private Group scheme
    Create, delete and configure user and system accounts
    Create, delete and configure groups
    Customize the PAM configuration
    Configure and control access to su and sudo
    Configure Linux systems to use centralized authentication and user information stores for system logins
    Implement a file server to share files with NFS v3 & v4
    Configure the automounter (autofs) allowing un-privileged users to mount filesystems on-demand
      Filesystem Administration
    Work with device nodes and udev
    Partition hard drives after installation
    Create and tune filesystems
    Mount filesystem, including persistent configuration in the /etc/fstab file
    Create, manage and tune swap devices
    Configure, manage, assign and maintain quotas on filesystems
    Create, use and remove File Access Control Lists (FACLs)
      LVM & Raid
    Configure Logical Volume Manager volume groups and logical volumes
    Create and use software RAID devices
    Grow and shrink logical volumes and the filesystems on them
    Use LVM snapshots to create consistent, reliable backups
      Task Automation & Process Accounting
    Use the at & batch facilities to run one-time tasks
    Manage cron jobs for recurring tasks, both system-wide and per-user
    Configure syslog for central system logging
    View, manage and kill running processes
    Monitor system and application logs on a daily basis with logwatch
    Configure process accounting and examine the resulting logs
    Limiting and measuring resource usage (ulimit, pam, sar, vmstat, iostat)
      Client Networking
    Configure TCP/IP networking on Linux systems
    Configure static routing on a Linux system
    Aggregate multiple network links into a single interface via the bonding driver's Etherchannel and 802.3ad support
    Configure a Linux system to participate in multiple VLANs on a managed switch via 802.1q frame tagging
    Configure and maintain a DHCP server
    Using networking diagnostics tool (ping,arp,ethtool)
    Enterprise Linux Fundamentals
    What is Linux?
    Identify the origins of UNIX and how Linux is related to UNIX
    Describe the major goals of the Free Software Foundation and the GNU project
    List key elements of a Linux distribution and name several distributions
    List several standards that apply to Linux
    Describe the basic mechanisms that make UNIX so powerful
      Multi User Concepts
    Describe the differences between the administrative (root) user and normal user accounts and explain when each should be used
    Log into the system
    Switch between accounts using the 'su' command
    Use basic commands to gather information about the system
    Use system help facilities to learn about commands and their options.
      The Linux File System
    List the standard system directories and explain what type of files are contained in each
    Navigate the file system
    Explain standard POSIX file permissions including special permissions such as the SUID, SGID and Sticky bits on both files and directories
    Change permissions of files
    Explain how file ownership (user: group) relates to file permissions
    Change ownership of files
    Describe how the User Private Group (UPG) scheme works and the problem it solves
      Manipulating Files
    Be able to create, delete, copy, move and rename files and directories
    Describe the various types of files that can be stored on UNIX and Linux file systems
    Explain hard links and symbolic links, their pros & cons and when & where they can or can not be used
    Identify the type of content of any file
    View the contents of both text-based and binary files
    Search the file system for files and directories with specific properties
      Text Processing
    Search inside of files for specified information
    Perform file editing, sorting, cutting & merging text files from the command linee
      Shell Basics
    Understand the varied roles the command shell plays in everyday UNIX/Linux usage
    Pipe several commands together to perform more complex and useful processing
    Use file redirection on the command line
    Create and use shell and environment variables to configure and control the operation of the system, the command shell and programs
    Use and escape special characters when they are used on the command line
      Regular Expressions
    Construct regular expressions for matching text patterns
    Archiving and Compression
    Use tar & cpio to create archives and extract files from them
    Compress and decompress files using the UNIX compress, GNU gzip, bzip2 and zip formats
      Text Editing
    Use simple text editors like pico and nano
    Perform basic and intermediate text editing functions efficiently with vi & Vim
    Perform basic and intermediate text editing functions with GNU Emacs
      Command Shells
    List the history and relationships of the various popular shell implementations available on UNIX and Linux systems
    Identify and switch between the various shell implementations
    Customize the command prompt on Bourne and BASH shells
    Use command line history, command completion, aliases and command line editing
    Customize command shell operation system wide and for individual users
      Introduction to Shell Scripting
    Process arguments passed into a shell script
    Get input from the user of a shell script
    Generate formatted output from a shell script
    Perform tasks conditionally using if, case and while loops in a shell script
    Perform repeated actions over a set of values with for loops on the command line and within shell scripts
    Do math in a shell script
      Process Management and Job Control
    Describe the differences between process and threads
    Find and control running programs with ps, top, kill, and nice
    Use the jobs, fg and bg commands to view and access several tasks at once on a single shell
    Use the screen command to run several programs and disconnect from running programs on remote systems
      Messaging
    Send local messages with the write and wall commands
    Use talk and ytalk to chat with other users
    Send and read email with the mail and pine commands
      The Secure Shell
    Configure the ssh client and sshd server programs securely
    Establish secure, remote connections to other systems
    Use SSH's key-based authentication
      Managing Software
    Find and download software via FTP & HTTP with text & graphical client programs like wget, lftp, links, Konqueror and Mozilla Firefox
    Install binary programs in RPM packages
    List software already installed on the system with RPM
    Compile and install software from source releases
    Compile and install software from a source RPM (SRPM or .src.rpm) package
      Printing
    Use CUPS to connect to available local and network printers
    Use various commands to process and convert files in preparation for printing
    Send jobs to a printer
    Monitor and remove print jobs
      Mounting FileSystems and Managing Removable Media
    Use the mount command
    Access NFS and SMB filesystems over the network
    Use autofs for on-demand mounting of filesystems without root privileges
      X Window System
    Start the graphical environment manually
    Select different desktop environments
    Launch graphical applications
    Use Linux as an X terminal
    Customize the graphical environment and auto-start applications at login and X startup
    Securely tunnel remote graphical applications through SSH
    How about posting this question in the Certification Forum
    Since Oracle Linux is based on Red Hat Enterprise Linux, you can use and search "RHEL books". There should some.

  • How to use LDAP authentication in Oracle Linux

    Hi All,
    In Oracle Linux 2.6.18-194 el5, goes to system->Administration->Authentication, enabled LDAP in both User Information and Authentication, tried to use network user account information to log in the linux machine but it did not work.
    The login screen waits over 10 minutes after enter username and password each and then says usename and password is not corrent.
    LDAP Settings only asked two information LDAP Search Base on and LDAP Server. We have another application which uses same LDAP server works fine.
    How to make Oracle linux server as LDAP client for user longin?
    Tanks in advance for yur help.

    I have no idea, but you might find it helpful to read Redhat's documentation concerning this subject:
    http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Deployment_Guide/ch-ldap.html

  • Where to download and how to install X Window System for Oracle Linux 5 ?

    Folks,
    Hello. I am using Oracle Linux 5 and Oracle Database 11g for PIA.
    Before install Oracle DB 11g into Oracle Linux 5, we need to install X Window System according to the document page 2 http://download.oracle.com/docs/cd/B28359_01/install.111/b32285.pdf
    But I don't know where to download and how to install X Window System for Oracle Linux 5.
    Can any folk provide a link to download X Window System and tutorial to install it for Oracle Linux 5 ?

    You can address the problem in a number of different ways.
    You can install X-windows from the installation DVD or setup access to the Oracle public software repository as described in http://public-yum.oracle.com. In which case, the command to install X-windows is: yum groupinstall "X Window System"
    Or, you login remotely and and use SSH with X-forwarding, in which case the software on the server will use the X-Windows server on your client system. This is probably the preferred way since you do not have X-windows installed on the server. For more details about SSH forwarding and howto, please see Install Oracle 11gR2 on Ubuntu Linux 11.04 (64-bit) Howto part 2 Oracle Universal Installer.

  • Oracle-Linux-Doubts

    I have installed Oracle linux 6.2. I need GUI mode. What should i do to get that?
    Also i dont have internet connnection on my server for accessing yum repo(online). So where can i download the repository image(offline) for oracle linux 6.2
    Please clarify my questions. Its very urgent...
    Thanks,
    Veijar

    In addition to the previous reply, the following will configure YUM to use your local installation DVD:
    Login as root and paste the following to the system command prompt:
    <pre>
    cat > /etc/yum.repos.d/dvd.repo <<EOF
    [Install_DVD_base]
    name=Install DVD
    baseurl=file:///mnt/Server
    gpgcheck=0
    enabled=1
    skip_if_unavailable=True
    EOF
    </pre>
    To use the yum software repository of the OS installation DVD, it will be necessary to mount it:
    <pre>
    cd /
    umount /dev/cdrom
    mount -o loop -t iso9660 /dev/cdrom /mnt
    yum clean all
    yum repolist
    </pre>
    Note: The oracle-rdbms-server-11gR2-preinstall package is not on the installation DVD, unless you use Oracle Linux 6.3.

  • How to connect Oracle Linux 6 on vmware without GUI

    Hi Guys,
    I've setup Oracle Linux 6 as Vmware Guest (on External Driver) and Windows 7 as Host. And I'm running Oracle EBS R12 on Linux.
    When I'm login to VMWare the Linux starts up with GUI which is just a waste of resources.
    Please let me know how can I run the Linux 6 in text mode on VMWare.
    Regards
    Vijay

    VijayDhapola wrote:
    Hi Guys,
    I've setup Oracle Linux 6 as Vmware Guest (on External Driver) and Windows 7 as Host. And I'm running Oracle EBS R12 on Linux.
    When I'm login to VMWare the Linux starts up with GUI which is just a waste of resources.
    Please let me know how can I run the Linux 6 in text mode on VMWare.
    Regards
    Vijay
    In addition to Dude's comments ... it sounds like you are connecting to your vm machine via the vmware console.   Personally, I treat that console just like I treat the console on my physical servers in my data center.  That is, I don't run down to the data center whenever I need to log on to a linux server.  That's what remote console programs such as putty are for.  I have a suite of 10 linux vm's on my Win7 desktop, and one of my 4 "Prime Directives" is that I access them using exactly the same Windows desktop tools I use to access my physical servers. 

  • In Oracle Linux 6 update 3, a question about Language

    Hi, I'm operating Oracle Linux 6 update 3.
    I have some question.
    After it is booting, We can select various Languages in fisrt login display. So then does it(Oracle Linux 6 update 3 vesrion) support all Languages without installing a Language Packs?
    thanks for reading this contens.
    If you know about this, plz...inform this.

    leave_for wrote:
    Hi, I'm operating Oracle Linux 6 update 3.
    I have some question.
    After it is booting, We can select various Languages in fisrt login display. So then does it(Oracle Linux 6 update 3 vesrion) support all Languages without installing a Language Packs?
    thanks for reading this contens.
    If you know about this, plz...inform this.At least if you select "desktop" during installation, then the answer is yes. But you have to run the ibus program, log out then log in to complete the process. You only need to run it once.

  • VNC on Oracle Linux 6.3

    Hi,
    I have just installed Oracle Linux 6.3 and I have noticed there is vncserver located in /usr/bin.
    So I start the vncserver using
    cd /usr/bin
    ./vncserver
    I am prompted for a password, which I supply. An authority file /root/.Xauthority is created
    A new desktop is created ( lab1.nms:1 )
    A default startup script /root/.vnc/xstarup is created and the application is started
    On my server I can now see the vncserver processes
    root      2501     1  0 15:19 pts/1    00:00:00 ./Xvnc :1 -desktop lab1.nms:1 (root) -auth /root/.Xauthority -geometry 1024x768 -rfbwait 30000 -rfbauth /root/.vnc/passwd -rfbport 5901 -fp catalogue:/etc/X11/fontpath.d –pn
    However when I launch my VNC viewer ( Real VNC 5.0.3 for Windows ) on my remot windows client and provide the connection as lab1.nms:1 ( which is in my local hosts file on my remote client ) I simply get a timeout
    There is no firewall between my client and server ( I am able to ssh, sftp, ping etc )
    Any ideas of what is wrong ? Do I need to do some further config in VNC ?
    Jim

    Add /etc/hosts entries in the following format - IP    FQDN   hostname
    Edit /etc/sysconfig/vncservers as follows:
         VNCSERVERS="1:<username>"
         VNCSERVERARGS[1]="-geometry 1280x1024"
    # server vncserver start
    # server iptables stop
    # chkconfig iptables off
    # chkconfig vncserver on
    Login to your VNC server as xxx.xxx.xxx.xxx:1

  • Oracle Linux 5.8 in VM Workstation 8

    Dear Gurus,
    I have downloaded Oracle Linux 5.8 (V31119-01), I want to install in VMware workstation 8.0.4 built 744019.
    Please advice
    Chakrapani.S

    Print Button is Greyed out / Disabled on Evince. (Issue Resolved)
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    LibreOffice 4.1.4 Hangs and Does not work properly. Files are not opening.
    LibreOffice 4.1.4 Crashed / Closed on CRTL + S shortcut Key . Also If you have Save a File it will crashed / Closed. You will have to Save the file by Save As.......
    Which Office Version is compatible and stable with Sun Ray 5.4.2 (LibreOffice or Apache Open Office) ?
    SunRay Session is not restored after power reset the DTU or Doest not Restored from Standby Mode. Error Message Shows Login Incorrect Please Try Again and CLICK OK.
    we have to manually Terminate the Session Through /opt/SUNWut/sbin/utsession -k -d
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  • Oracle Linux virtual machines failing to boot

    We have 2 oracle linux virtual machines on one host machine, both running Oracle Linux release 6 update 2 for X86_64. Both were built identically with oracle 11 installed on them. Both machines were working ok until this morning when the host machine rebooted. After the reboot, the virtual machines now hang during the boot process. The login prompt never comes up. The database does not start up on both machines. The machines are up enough that I could putty into them. In  startup.log, the following is listed for the two machines. One is named demo, the other test.
    SQL*Plus: Release 11.2.0.1.0 Production on Fri Oct 4 12:24:02 2013
    Copyright (c) 1982, 2009, Oracle.  All rights reserved.
    SQL> Connected to an idle instance.
    SQL> ORACLE instance started.
    Total System Global Area  438423552 bytes
    Fixed Size            2214136 bytes
    Variable Size          331351816 bytes
    Database Buffers      100663296 bytes
    Redo Buffers            4194304 bytes
    Database mounted.
    ORA-00313: open failed for members of log group 2 of thread 1
    ORA-00312: online log 2 thread 1: '/u02/oradata/demo/redo02.log'
    ORA-27037: unable to obtain file status
    Linux-x86_64 Error: 2: No such file or directory
    Additional information: 3
    SQL> Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
    With the Partitioning, OLAP, Data Mining and Real Application Testing options
    /u01/app/oracle/dbhome_1/bin/dbstart: Database instance "demo" warm started.
    SQL*Plus: Release 11.2.0.1.0 Production on Fri Oct 4 13:06:49 2013
    Copyright (c) 1982, 2009, Oracle.  All rights reserved.
    SQL> Connected to an idle instance.
    SQL> ORACLE instance started.
    Total System Global Area  438423552 bytes
    Fixed Size            2214136 bytes
    Variable Size          331351816 bytes
    Database Buffers      100663296 bytes
    Redo Buffers            4194304 bytes
    Database mounted.
    ORA-03113: end-of-file on communication channel
    Process ID: 3665
    Session ID: 1 Serial number: 5
    SQL> Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
    With the Partitioning, OLAP, Data Mining and Real Application Testing options
    /u01/app/oracle/dbhome_1/bin/dbstart: Database instance "test" warm started.
    The demo machine is looking for a redo log file. The file does not exist. If that file ever existed, what would make that file disappear? The test machine does not have any redo log files either but the test one is not even looking for it.
    What could have gone wrong with these?

    user7222768 wrote:
    We have 2 oracle linux virtual machines on one host machine, both running Oracle Linux release 6 update 2 for X86_64. Both were built identically with oracle 11 installed on them. Both machines were working ok until this morning when the host machine rebooted. After the reboot, the virtual machines now hang during the boot process. The login prompt never comes up. The database does not start up on both machines. The machines are up enough that I could putty into them. In  startup.log, the following is listed for the two machines. One is named demo, the other test.
    SQL*Plus: Release 11.2.0.1.0 Production on Fri Oct 4 12:24:02 2013
    Copyright (c) 1982, 2009, Oracle.  All rights reserved.
    SQL> Connected to an idle instance.
    SQL> ORACLE instance started.
    Total System Global Area  438423552 bytes
    Fixed Size            2214136 bytes
    Variable Size          331351816 bytes
    Database Buffers      100663296 bytes
    Redo Buffers            4194304 bytes
    Database mounted.
    ORA-00313: open failed for members of log group 2 of thread 1
    ORA-00312: online log 2 thread 1: '/u02/oradata/demo/redo02.log'
    ORA-27037: unable to obtain file status
    Linux-x86_64 Error: 2: No such file or directory
    Additional information: 3
    SQL> Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
    With the Partitioning, OLAP, Data Mining and Real Application Testing options
    /u01/app/oracle/dbhome_1/bin/dbstart: Database instance "demo" warm started.
    SQL*Plus: Release 11.2.0.1.0 Production on Fri Oct 4 13:06:49 2013
    Copyright (c) 1982, 2009, Oracle.  All rights reserved.
    SQL> Connected to an idle instance.
    SQL> ORACLE instance started.
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