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How to list installed packages in Debian or Ubuntu

If you want to see what packages are installed in Debian or Ubuntu system use following commands: To list all the package installed: dpkg-query -l This will return something similar to this: dpkg-query...

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Postgres 9.4 failed to start in container – How to Fix

After upgrading Postgres to version 9.4 in VM using container service failed to start with following message: /etc/init.d/postgresql start [....] Starting PostgreSQL 9.4 database server: main[....] The...

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