1 |
Linux [Internet], https://www.linux.org/
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2 |
Top 7 PCs Shared by World / Domestic [Internet], http://catalk.kr/information/desktop-operating-systems.html
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3 |
Ubuntu [Internet], https://ubuntu.com/
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4 |
Historical trends in the usage statistics of Linux subcategories for websites [Internet], https://w3techs.com/technologies/history_details/os-linux.
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5 |
S. Kim and T. Cho, "A Study on Vulnerabilities of Linux Password and Countermeasures," CUTE 2019. paper No.9, 2019.
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6 |
Michael Kerrisk, Linux Programmer's Manual [Internet], http://man7.org/linux/man-pages/man5/group.5.html. GitHub.
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7 |
Michael Kerrisk, File Formats and Conversions-SHADOW [Internet], http://man7.org/linux/man-pages/man5/shadow.5.html, GitHub.
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8 |
Michael Kerrisk, User Command-PASSWD [Internet], http://man7.org/linux/man-pages/man1/passwd.1.html, GitHub.
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