dBuggr » linux

How to Upgrade Oracle Linux OS from 5.5 to 5.7 or Later

smallwei — Wed, 04 Jan 2012 19:31:44 +0000

How to upgrade Oracle Linux OS from 5.5 to 5.7 or later Related posts:Resolving Oracle Problem “… Error While Loading Shared Libraries … Libnnz11… Oracle Database Max Block Size (DB_BLOCK_SIZE) for Windows/Linux/Unix/Mac Commands to Turn Off, Restart, and Shutdown Linux Linux Server/computer Related posts:

Resolve and Remove “BAD PASSWORD: It is Based on a Dictionary Word “in Linux

smallwei — Thu, 17 Nov 2011 01:24:51 +0000

Resolve and Remove “BAD PASSWORD: it is based on a dictionary word “in Linux If you know what you’re doing and want to use weak password in Linux (CentOS, RedHat … etc), follow the steps below. Related posts:How to Disable Graphic Mode (KDE/GNOME/X11) in Linux During Startup Boot Time Steps on How to Reset OC4J Admin Password How to [...] Related posts:

Useful Linux Trace Command to Troubleshoot Issues

milly — Mon, 22 Aug 2011 18:20:45 +0000

Useful Linux trace command to troubleshoot issues If you need to troubleshoot issues in Linux, you can use the following command to get detail system calls information Related posts:How to Enable/start Log Trace/tracing in Oracle Database Useful Linux Command to Purge/flush/clean/free Up Memory (drop Cache) How to Dump Data in Linux System (dd Command) Related posts:

Fix Java.sql.SQLRecoverableException: I/O Exception: Connection Reset Issue on L…

milly — Thu, 28 Jul 2011 18:06:56 +0000

Fix java.sql.SQLRecoverableException: I/O Exception: Connection reset issue on Linux
If you encounter “java.sql.SQLRecoverableException: I/O Exception: Connection reset” issue on Linux or Sun, the following tip might be able to help you.

java.security.SecureRandom is a standard API provided by sun. Among various methods offered by this class void nextBytes(byte[]) is one. This method is used for generating random bytes. Oracle 11g JDBC drivers use this API to generate random number during login.

You might see errors similar to the following:

java.sql.SQLRecoverableException: IO Error: Connection reset
        at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:1028)
        at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1307)
        at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3449)
        at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3550)
        at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:1374)
        at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at oracle.ucp.jdbc.proxy.StatementProxyFactory.invoke(StatementProxyFactory.java:230)
        at oracle.ucp.jdbc.proxy.PreparedStatementProxyFactory.invoke(PreparedStatementProxyFactory.java:124)
        at $Proxy86.execute(Unknown Source)

Useful Linux Command to Purge/flush/clean/free Up Memory (drop Cache)

milly — Wed, 22 Jun 2011 18:47:19 +0000

Useful Linux command to purge/flush/clean/free up memory (drop cache) Linux usually cache as much data as possible to faster access. It automatically manage the memory for you. However, sometimes you might want to free up the memory yourself in case Linux is not doing it’s job. Here are the commands for you to do that. Related posts:Clearing [...] Related posts:

How to Automate Encryption/decryption in Linux/Windows/Unix Using GPG with Passp…

milly — Tue, 14 Jun 2011 21:07:51 +0000

How to automate encryption/decryption in Linux/Windows/Unix using GPG with passphrase Here are two commands that you can use for encryption and decryption of files without manually entering the passphrase. You simply store the passphrase in a file. This is create for cron job type of batch operation. Related posts:LINUX UNIX Useful Commands Commands to tar gzip and unpack [...] Related posts:

How to Show Hidden Control Characters Using Vi in Unix/Linux

milly — Fri, 20 May 2011 17:03:57 +0000

How to show Hidden Control Characters using vi in Unix/Linux If you need to show hidden control characters such as tab, return carriage, you can use the following command in vi Related posts:How to Show Hidden Files in the Apple Mac OS X Finder How to Search and Insert a Carriage Return Character at the End of the [...] Related posts:

How to Automatically Set the $DISPLAY Variable for Current Session in UNIX/Linux…

milly — Tue, 05 Apr 2011 01:57:49 +0000

How to automatically set the $DISPLAY variable for current session in UNIX/Linux If you use XWindows, sometimes you need to set the DISPLAY for the session to transfer to your local laptop/desktop. With the following tip you can allow Unix/Linux to automatically setting it for you. Related posts:How to Display Current Year and Month in PHP Script The [...] Related posts:

How to Install VMware .bundle File on Linux (Ubuntu, RedHat, SUSE, Mint Etc) OS

smallwei — Tue, 07 Dec 2010 09:34:04 +0000

How to install VMware .bundle file on Linux (Ubuntu, RedHat, SUSE, Mint etc) OS If you just downloaded VMWare workstation or player .bundle file from VMware for Linux and don’t know what to do with it, you can follow the simple tip below to continue the installation Related posts:How to Install Adobe Reader in Ubuntu or Other [...] Related posts:

How to Install Adobe Reader in Ubuntu or Other Linux Distributions

milly — Mon, 06 Dec 2010 02:18:59 +0000

How to Install Adobe Reader in Ubuntu or other Linux Distributions If you need to read pdf file in Linux, follow the instruction below. Related posts:How to Install VMware .bundle File on Linux (Ubuntu, RedHat, SUSE, Mint Etc) OS How to Download Adobe Acrobat Reader X Using Firefox or IE Directly Simple Steps to Install PHP5 and Apache on [...] Related posts: