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Postgresql Administration and Geolocalization with PostGis. In this example, show how it's calculated distance in Km.

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  Postgresql Administration and Geolocalization with PostGis. In this example, show how it's calculated distance in Km. #postgresql #sql #pgsql #query #dba #database #administration #onpremise #aws #server #cloud #backend

Linux Encryption with command 'mcrypt'.

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  Linux Encryption with command 'mcrypt'. An example. #mcrypt #linux #cybersecurity #ethicalhacking #hacking #encryption #cryptography    

Linux Reverse Engineering C library, with command 'readelf'.

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  Linux Reverse Engineering C library, with command 'readelf'. An example. #linux #reverse #engineering #c #gcc #library #hacking #ethicalhacking #cybersecurity #programming

Postgresql Administration. How to recovery record deleted, with instrucions 'Begin transactions'.

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  Postgresql Administration. How to recovery record deleted, with instrucions 'Begin transactions'. An example. #postgresql #rollback #transaction #query #pgsql #dba #database #administration #backend #onpremise #aws #cloud #server

Cyber Security/Ethical Hacking. How to work Brute Force Attack. In this example, show a dissection of attack, with tool 'hydra' and a wordlist text generic.

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 Cyber Security/Ethical Hacking. How to work Brute Force Attack. In this example, show a dissection of attack, with tool  'hydra' and a wordlist text generic. #ethicalhacking #cybersecurity #penetrationtesting #hydra #wordlist #hacking 

Sql Server Administration. How to show text file content, with 'select'. An example.

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  Sql Server Administration. How to show text file content, with 'select'. An example. #sqlserver #dba #database #administration #tsql #sql #bulk #aws #cloud #server #backend

Postgresql Administration. An example of query instruction 'Left Join', making lead subset on the left.

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  Postgresql Administration. An example of query instruction 'Left Join', making lead subset on the left. #postgresql #administration #dba #query #pgsql #backend #database #aws #cloud #onpremise