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Common Linux Commands

df shows free and used disk space
top shows memory usage – updates in real time
ps Process Status – lists running processes
ps -ef show system processes
find . -name FILENAME -print locate a file named FILENAME and show it’s location
grep -r “pattern” * search through all files and subdirectories from the current directory for the given pattern and print matches
uname -a displays the current kernel version
lsb_release -a displays Ubuntu installation version
fdisk -l lists partition info

Ubuntu/Debian Package Management

Install an app: sudo apt-get install name

Remove: sudo apt-get remove name (‘apt-get remove –purge name’ to remove all config files also)

List installed packages: sudo dpkg –list | more

RPM Commands (Red Hat/Fedora and derivatives)

rpm -ivh PACKAGE installs a new RPM
rpm -e PACKAGE uninstalls an RPM
rpm -qi PACKAGE Queries that a package is unstalled and displays information about it
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IBM and BEA join together to submit JSR for cross App Server tools

As part of the Java Tools Community initiative announced in the news yesterday, IBM and BEA Systems have announced they have created 3 Java Specification Requests (JSRs) for 3 new technologies which will be developed using the Java Community Process (JCP) and will be implemented on both IBM Websphere as well as BEA Weblogic.

The 3 new specifications are:

  • Service Data Objects: will provide a common mechanism to pull data from multiple sources such as XML sources and databases
  • Timer for Application Servers, a mechanism for scheduling processing jobs
  • Work Manager for Application Servers, for setting up processing tasks in parallel

Industry analysts have commented that the omission of Sun in the group developing these new specifications is significant, and probably signifies the beginning end of Sun’s involvement in the development of new technologies based on Java technology. IBM and BEA are the dominant market players in the Application Server market space, and with this announcement are now together shaping new future technologies on the Java platform.

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Java Tools Community forms to promote cross tool integration

Several major Java tools vendors, including Oracle and Sun, are forming a standards group in order to promote interoperability between different toolsets, and in particular, IDEs.

The move is seen as one attempt to promote and construct IDEs that are comparable in functionality to Microsoft’s VisualStudio.NET – last year at JavaOne Sun made several statements refering to the need to reduce development complexity in the Java API arena, and produce quality tool sets.

This group may be looking at the ability to build a common add-on framework so that most IDEs can share add-ons and plug-ins.

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