1) JMX Issue: while making an Application JMX enabled.
use "history -c".
Resolution: Add to your VM options:
JAVA_OPTS="$JAVA_OPTS $DEFAULT_JAVA_DEBUG_OPTS -Djava.net.preferIPv4Stack=true -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=8007 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=12.221.32.4 -Dremoting.bind_by_host=false"
-Dsun.lang.ClassLoader.allowArraySyntax=true2) How do I create a soft link (symbolic link) under UNIX or Linux operating system?
A. To make links between files you need to use ln command. A symbolic link (also known as a soft link or symlink) consists of a special type of file that serves as a reference to another file or directory. Unix/Linux like operating systems often uses symbolic links.
Two types of links
There are two type of links.
- symbolic links: Refer to a symbolic path indicating the abstract location of another file
- hard links : Refer to the specific location of physical data.
How do I create soft link / symbolic link?
To create a symbolic link in Unix or Linux, at the shell prompt, enter the following command:
ln -s {target-filename} {symbolic-filename}
ln -s {target-filename} {symbolic-filename}
For example create softlink for /webroot/home/httpd/test.com/index.php as /home/vivek/index.php, enter the following command:
ln -s /webroot/home/httpd/test.com/index.php /home/vivek/index.php
ls -lOutput:
lrwxrwxrwx 1 vivek vivek 16 2007-09-25 22:53 index.php -> /webroot/home/httpd/test.com/index.php3) How to clear the history in linux?
Resolution:use "history -c".
