Posts

Synchronizing time in a Linux server..

Login to server as root and update the time using 'rdate' command. for example, to update the time of server with Italian Time, # rdate -s time.ien.it here 'rdate -s' is the command and time.ien.it is one the public time server for Italy. u can find the name of public NTP servers of your country in the following link http://support.ntp.org/bin/view/Servers/WebHome

Good IP locating Sites

I find these 2 sites good in locating the location of  an IP address http://www.iplocation.net/ http://www.ip2location.com/

what to do when your IP is blocked by Gmail

While sending email to any gmail account or accounts configured with mx record of google, if you find the following error:- ================================== Remote host said: 550-5.7.1 [92.60.120.47 1] Our system has detected an unusual rate of 550-5.7.1 unsolicited mail originating from your IP address. To protect our 550-5.7.1 users from spam, mail sent from your IP address has been blocked. 550-5.7.1 ================================== take the required measurements for blocking spamming in your server following the link   http://www.google.com/mail/help/bulk_mail.html there is no option that the goggle can provide you a direct support for unblocking the IP. if the issue persists after few more days, use the google support contact form for submitting a request  with the problem you are facing... good luck! if you seems unblocked from gmail even after 2 weeks, use this non bulk contact form.. http://support.google.com/mail/bin/static.py?hl=en&ts=12282...

Oracle 10g installation steps in CentOS 5

 Download the Oracle 10g database from the Oracle website. Graphical environment should be installed correctly in the server before installing oracle. Open a terminal command line and Untar the zip file and go to the folder 'database'. From there type the below given command as a user other than root. Better create a user named 'oracle'. ./runInstaller -ignoreSysPrereqs If you find any error as shown below, ---------- Initializing Java Virtual Machine from /tmp/OraInstall2008-08-25_11-53-58AM/jre/bin/java. Please wait... Exception in thread "main" java.lang.UnsatisfiedLinkError: /tmp/OraInstall2008-08-25_11-53-58AM/jre/lib/i386/libawt.so: libXp.so.6: cannot open shared object file: No such file or directory  --------- Then install libXp as shown below, yum install libXp And then give the command 'runinstaller' . The software will then open a graphical interface and will check for the system requirements. If it shows some errors in th...

Installing RPMforge for CentOS 5

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The default RPMforge repository does not replace any CentOS base packages. In the past it used to, but those packages are now in a separate repository (rpmforge-extras) which is disabled by default. You can find a complete listing of the RPMforge package packages at http://packages.sw.be/ Download the rpmforge-release package. Choose one of the two links below, selecting to match your host's architecture. If you are unsure of which one to use you can check your architecture with the command uname -i i386 http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el5.rf.i386.rpm x86_64 http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.2-2.el5.rf.x86_64.rpm The preferred rpmforge-release package to retrieve and to install in order to enable that repository is one of the two listed above. Install DAG's GPG key rpm --import http://apt.sw.be/RPM-GPG-KEY.dag.txt Verify the package you have downloaded rpm -K rpmforge-release-0.5.2-2.el5.rf.*.rpm Securi...

Oracle command to lock,unlock and change password of a user

Oracle commands to lock and unlock a user alter user user_name account lock; alter user user_name account unlock; To change a user's password in Oracle, alter user user_name identified by new_password ; user_name is the user whose password you wish to change. new_password is the new password to assign. user_name must be substituted with the real username. new_password with the password.

When OE Inbox.dbx becomes too big

  You have two choices. If you do not have any messages that you need, you can just wipe out the Inbox by creating a new one. If you do have messages you need, do the following, but instead of deleting the Inbox.dbx, rename it to Inboxold.dbx. You will still have a new empty, and working Inbox, but will need a tool to retrieve the lost messages.  Tools | Options | Maintenance | Store Folder will reveal the location of your Outlook Express files. Write the location down and navigate to it in Windows Explorer or, copy and paste it into Start | Run. In WinXP, Win2K & Win2K3, the OE user files (DBX and WAB) are by default marked as hidden. To view these files in Windows Explorer, you must enable Show Hidden Files and Folders under Start | Control Panel | Folder Options Icon | View, or in Windows Explorer | Tools | Folder Options | View. With OE closed, find the Inbox.dbx. as mentioned above, if there isn't any mail such important, you can delete them directl...