PostgreSQL (or simply Postgres) is powerful and extremely popular database management system. It comes with easy to use tool that makes it possible to export output of any query into text file. If you are familiar with Mysql you may know about SELECT … INTO OUTFILE syntax already so here is its equivalent to output PostgreSQL to file: 1. Connect to PostgreSQL DBA: $ psql -U postgres -p 5432...
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Wget is an elegant command line tool for downloading files over HTTP, HTTPs or FTP. Many of us are using it to just to get or reget files (reget means continue downloading of partially-downloaded file), save web pages with all contents (known as recursive download). Wget can also be used to download files via proxy. It takes address of the proxy from environment variable so in order to download...
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Most of Linux users are using wget from time to time, sometimes even when they don’t know about it – many GUI download managers for Linux are based on wget. Anyways wget is command line tool for downloading files over HTTP, HTTPs and FTP protocols within single session. It works like a charm with default settings for downloading simple static files, at the same time if content is...
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As any other monitoring system Nagios can produce false alarms. Usually it happens when Nagios fails to get the reply from the host being monitored during some pre-defined timeout. In order to mark service as down Nagios does three checks and if all of them are failed then the service is marked down and administrator will got an alert about its critical status. At the same time even if one of...
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Nfsen is open source sensor: it accepts netflow data from multiple netflow probes (servers, routers, vpn concentrators etc) and then visualizes it into human readable form. So using Nfsen you can see traffic statistics of every network device in your network in one place (actually Nfsen provides much more features). By default Nfsen makes it possible to see only inbound and outbound traffic...
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The term “Ubuntu” hails from South Africa and is defined as “humanity or kindness”… The meaning of this word is the whole philosophy behind the operating system named after it — Ubuntu. The company of Ubuntu believes that software should be available free of charge, that tools should be usable by people in their native language and despite any disabilities, and that users have the...
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