Operating syst

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Operating systém GNU Linux
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History

• First computers
• WW II
• The Bomb (Alan Turing)
• Colosus (Thomas Flowers)

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History

• ENIAC 1946 (US Army)

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History

• 1936 Z1-Z3 Computers (Konrad Zuse, Germany)
• Destroyd 1944

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1950-1959

• Jobs system
• Languages of Symbolic Adreses (Assembler)
• UNIVAC (1. commercial product)

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1960-1965

• Early computers with Operating systems
• MFT (IBM,1962)
• Multics (Multiplexed Information and Computing
  servicies, Bell laboratories, 1964)

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UNIX

• 1969 Ken Thompsen, Dennis Ritchie (Bell
  Laboratories, ATT)
• Computer game Space Travel
• Multitasking
• Multiuser
• Written in Hight Programming Language (C)
• File system

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History of UNIX
http//upload.wikimedia.org/wikipedia/commons/1/11
/Unix-history.svg
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LINUX

• 1991 (Linux Thorvald)
• Linux Distribution
• Debian, Fedora, Red Hat,
• GNU Linux
• SLAX

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PC Operation Systems

• 1981 MS DOS
• 1985 MS Windows
• .

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Architecture of OS
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Shell

• Application sw for communication between user and
  OS kernel
• Bourne shell (bs)
• Borne again shell (bash)
• C shell (csh)
• Secure shell (ssh)

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Bourne again shell

• GNU shell used in various distribution of GNU
  Linux
• UNIX compatible

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File system

• ls
• ls l
• pwd
• cd
• rm,cp,mv
• type
• more

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Linux file system

• bin --- basic executable files
• boot --- start szstem files
• etc --- tables
• home --- home directories of users
• lib --- libraries
• mnt --- mounted devicies
• usr --- applications

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Redirection of input, output

• echo Hello friends
• echo Hello friends gtfile
• type file
• type file, file gt file
• type file more
• mail vanicek_at_fsv.cvut.cz ltfile

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Rules of acces

• rwxrwxrwx
• rwxr- -r--
• chmod
• chown

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Processes

• ps
• ps aux
• while 1 do echo hallo
• while 1 do echo hallo gt file
• running on background
• kill PID

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Users

• /etc/passwd
• adduser

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Exercise

• Create new user with your login name
• Create user vanicek
• Create file with a greeting
• Send this file by mail to user vanicek
• Set rights to this file to everyone
• Start a process iteratively sending an greeting
  email to user vanicek
• Stop this process