Installing Parallels Tools in Linux Virtual Machine
Sometime happens you need to manually mount the cdrom to be able to install the Parallels Tools. Follow these instructions to do that: 1) Start the virtual machine. When the […]
Ubuntu
How to switch between different JVM in Ubuntu
Sometime is needed to install different JVM on Ubuntu server due to application compatibility or software development purposes. To switch between different JVM in ubuntu from command line, use this […]
ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
If the database is running, probably the database hasn’t registered yet with the listener. This occurs when the database or listener just starts up. To fix, connect as sysdba: SHOW […]
Ubuntu md5 hash of a string
Just use md5sum with no options: echo ‘String’ | md5sumecho ‘String’ | md5sum
Apt-get: Cannot initiate the connection to 8080:80
To fix this issue, open the apt.conf configuration file: vi /etc/apt/apt.confvi /etc/apt/apt.conf Add this row or check it if already exists: Acquire::http::proxy “http://proxy.localdomain:8080/”;Acquire::http::proxy “http://proxy.localdomain:8080/”;
Oracle admin on Ubuntu server
To be able to admin Oracle instance from sqlplus command line on Ubuntu server, for first you need to set the enviroment variables: source /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.shsource /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.sh At this point, is […]
Oracle 11gR2 Express Edition on Linux Ubuntu 11.10 howto
To install Orace 11gR2 Express Edition, please take a look to this tutorial (tutorial? THE TUTORIAL!) https://forums.oracle.com/forums/thread.jspa?threadID=2301639