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C Language and how to manage list with node. In this example use struct for manage nodes. #nodes #list #fifo #lifo #c #gcc #unix #linux #backend #fullstack #programming #research #mathematics #physics      

  Unix BSD, how to permissions scheme. Below ana example how to create user , create group and add user to group. #unix #bsd #linux #administration #systems #systemegineering #systems #backend #cloud #aws #bash #shell #aix      

  Ethical Hacking and Penetration Testing. In thi example show 'nmap' command with parameter 'script http', for retrieve data about web server on router. #nmap #hacking #penetrationtesting #cybersecurity #script #malware #shellcode #unix #linux #vapt #apt #blackhat #offensive    

  Linux Administration and 'stat' function in Linux Systems. The 'stat' function display many information about file, for example, UID and GID user, block of allocation memory,access rights etc.. #linuxadministration #stat #filesystem #linux #unix #backend #shell #bash      

  Perl Language and Bioinformatics. In this example, show the 'POP' operations, for shift characters in the strings. #perl #bioinformatics #research #pop #fifo #lifo #script #unix #linux #shell #bash #backend #fullstack      

  Python Language and quadratic equation. Mathematics. #python #mathematics #physics #research #backend #fullstack #statistics #unix #linux      

  Linux Administration, working on scanner with 'sane' software and driver customized. #linuxadministration #sane #xsane #scanner #print #ocr #linux #unix #backend #fullstack #systemengineering #system      

  Mysql Administration and JSON function 'JSON_ARRAYAGG()'. The JSON_ARRAYAGG function is used to create an array of JSON documents from several rows. Example. #mysql #sql #dba #query #json #json_arrayagg #reporting #backend #fullstack #database #bigdata      

  Ethical Hacking and ARP Poisoning Spoofing, with framework 'metasploit'. Example. #ethicalhacking #cybersecurity #penetrationtesting #malware #shellcode #spoofing #arp #poisoning #meatsploit #backend #research #unix #linux    

  C Language and calculate indefinition integrate, with method 'Montecarlo'. Below an example. #c #gcc #mathematics #physics #montecarlo #research #statistics #backend #fullstack #unix #linux        

  Ethical hacking and Reverse Engineering with command 'od' and various parameters. Below any examples. #od #reverseengineering #ethicalhacking #cybersecurity #malware #shellcode #linux #unix #shell #bash #backend #penetrationtesting      

  C Language and Mathematics Examples. In the first, compile the program for Fibonacci Series. In the second, compile same program, with option for dynamic external library. #c #gcc #mathematics #fibonacci #mathematics #research #library #shared #backend #fullstack #unix #linux      

  Postgresql and how to use module 'earthdistance', for find the distance between two points, in miles. #postgresql #database #dba #sql #query #earthdistance #backend #fullstack #bigdata #unix #linux      

  Ethical Hacking/ Penetration Testing. How to use command 'ping' with clause '-n'. Ping sweep is used to identify the live host from a range of IP addresses by sending the ICMP ECHO request and the ICMP ECHO reply. #ethicalhacking #penetrationtesting #hacking #cybersecurity      

  Postgresql and how to use extension 'hstore'. This extension help to store sets of key/value pairs within a single PostgreSQL value. This can be useful in many cases. #postgresql #database #sql #dba #backend #fullstack #reporting #bigdata #json #query #unix #linux #plsql #pgsql      

  Mysql Database and C Language. How to connect and extract data by code, with paramaters for compiler, customized. Below an example. #mysql #database #dba #sql #reporting #c #gcc #backend #fullstack #c_ansi #c_unix #linux #unix #shell #bash      

  Linux Administration Script Language Bash, example for count line in file. #script #bash #shell #linux #linuxadministration #backend #sql #database #dba #unix #bigdata      

  Ethical Hacking. How to perform nmap execution with paramaters 'oa_externalrange', for stored report about work of retrieving data and penetration testing. #penetrationtesting #ethicalhacking #nmap #osint #cybersecurity #hacking #linux #unix      

  MsSqlServer/Transact Sql. How to create Stored Procedure. Below an example. #mssqlserver #tsql #sql #query #dba #stored #backend #fullstack #reporting      

  Postgresql and 'update' instruction with calc on 'set'. Example. #postgresql #sql #database #dba #update #set #calc #backend #fullstack #reporting      

  Linux Administration and 'sed' command for fast replace strings. Below an example. #linuxadministration #sed #bigdata #linux #unix #sql #csv #txt #text #replacefast #shell #bash #backend      

  Python Language and Distribution Report Sales, extract from database MySql. #python #mysql #reporting #statistics #mathematics #database #dba #sql #unix #linux #backend #fullstack