xv6

MIT's Operating System Engineering course formerly used the original V6 source code. xv6 was created as a modern replacement, because PDP-11 machines are not widely available and the original operating system was written in archaic pre-ANSI C. Unlike Linux or BSD, xv6 is simple enough to cover in a semester, yet still contains the important concepts and organization of Unix.[1]

One feature of the Makefile for xv6 is the option to produce a PDF of the entire source code listing in a readable format. The entire printout is only 99 pages, including cross references.[2] This is reminiscent of the original V6 source code, which was published in a similar form in Lions' Commentary on UNIX 6th Edition, with Source Code.

xv6 has been used in operating systems courses at many universities, including:

• Ben-Gurion University[3]
• Binghamton University
• CentraleSupélec
• Columbia University[4]
• Ghulam Ishaq Khan Institute[5]
• Federico Santa María Technical University
• George Washington University[6]
• Georgia Tech[7]
• IIIT Allahabad
• IIT Bhubaneswar and PEC Chandigarh
• IIT Bombay[8]
• IIT Delhi
• IIT Madras
• IIIT Delhi
• IIIT Bangalore
• IIIT Hyderabad
• Iran University of Science and Technology[9]
• Johns Hopkins University[10]
• Karlsruhe Institute of Technology[11]
• Linnaeus University[12]
• Milwaukee School of Engineering
• Motilal Nehru National Institute of Technology Allahabad
• National Taiwan University[13]
• National University of Córdoba[14]
• National University of Río Cuarto[15]
• New York University
• Northeastern University[16]
• Northwestern University[17]
• Portland State University[18]
• Rutgers University[19]
• Slovak University of Technology in Bratislava[20]
• Southern Adventist University[21]
• Stony Brook University[22]
• Technion – Israel Institute of Technology[23]
• Tsinghua University[24]
• Federal University of Minas Gerais[25]
• University College Dublin[26]
• University of Belgrade School of Electrical Engineering[27]
• University of California, Irvine
• University of California, Riverside[28]
• University of Hyderabad
• University of Illinois at Chicago[29]
• University of Leeds[30]
• University of Modena and Reggio Emilia[31]
• University of Otago[32]
• University of Palermo[33]
• University of Pittsburgh[34]
• University of Strasbourg[35]
• University of South Florida[36]
• University of Tehran[37]
• University of Utah[38][39]
• University of Virginia[40]
• University of Wisconsin–Madison[41]
• Yale University[42]

• Operating Systems Engineering (6.828)

RISC-V:

• xv6 source code
• xv6 book source code
• xv6: a simple, Unix-like teaching operating system, xv6 book rev3.

x86 (unmaintained):

• xv6 source code
• xv6 book source code
• xv6: a simple, Unix-like teaching operating system, xv6 book rev11.
• Printable version of the xv6 source code, rev11.