Installing JDK on Ubuntu

OpenJDK

To install Open JDK 11 LTS

sudo apt-get install openjdk-11-jdk

sudo apt install default-jdk

Oracle JDK

For Oracle JDK you have to manually download from the Oracle JDK website and install it. PPA doesn't work well anymore.

Manage JAVA

If you have multiple JDK on your machine, you can configure which version to be used using the following command by selecting one.

sudo update-alternatives --config java

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Remove Log files from Checkpoint

Here is how you can delete checkpoint old log files 1. Go to Gaia Terminal 2. Enter expert mode 3. echo $FWDIR to get the log file location 4. Go to the Log directory cd $FWDIR/log 5. rm 2013-10-01* to remove 1st Oct 2013 logs

Clear Zimbra Mail Queue

If you want to clear mail queue from specific email address run the following command in your terminal. Below will remove mail queues, by checking FROM sender. eg. remove all mail queues sent by info@example.com /opt/zimbra/postfix/sbin/mailq | tail -n +2 | grep -v '^ *(' | awk 'BEGIN { RS = "" } { if ($7 == "info@example.comt") print $1 } ' | tr -d '*!' | xargs -rn1 /opt/zimbra/postfix/sbin/postsuper -d Below will remove mail queues, by checking TO sender. eg. remove all mail queues sent to info@example.com /opt/zimbra/postfix/sbin/mailq | tail -n +2 | grep -v '^ *(' | awk 'BEGIN { RS = "" } { if ($8 == "info@example.comt") print $1 } ' | tr -d '*!' | xargs -rn1 /opt/zimbra/postfix/sbin/postsuper -d

Know your Lha Zha, Sog Zha, Shi Zha

There is believe in Buddhism, that an individual person have got their own lucky day and bad luck day in a week. They are derived from the twelve animals similar to chiness horscope. Your birth year tells you which Buddhism zodiac sign you below to. Lha Zha and Sog Zha are belived to be good day while Shi zha is consider bad day.

Bhutan ICT

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