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43 Cards in this Set
- Front
- Back
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Who developed the language of C? Unix?
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Dennis Ritchie & Ken Thompson
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What is an operating system?
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> programs which make the computer work
>talks to all the hardware for you (ex. printers) |
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What do you need in order to be a computer?
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RAM = random access memory CPU = computer processing unit
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What's a kernal?
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* master control program
* schedules tasks * manages resources * core of the computer/runs the computer |
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What is a file system?
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files & directories
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What are utilities?
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software tools/commands
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What is a geographical user interface (GUI) ?
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provides and easy to use environment
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What is UNIX made up of?
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> kernal
> shell > programs |
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What is a shell?
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A program that accepts commands.
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Examples of shells.
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P.I.N.E. = Pine is not Elm
G.N.U. = Gnu is not Unix |
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What is the root of the hard drive?
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C:\
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What is the root directory?
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/
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Label. /home/faculty/myers
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/home = root directory
/faculty = folder /myers = file |
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Is unix case sensitive?
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hell yea
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Absolute path names
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start at the root.
/home/lister/guitar |
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Relative path names
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path from where you are right now
home/lister/guitar |
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What does ~ do?
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Refers to your own home directory.
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What does pwd stand for?
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print working directory
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what does ftp stand for?
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file transfer protocol
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What's a parameter?
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not a flag.
Ex: cd (..) cd (../testfiles/part1) |
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What does "man" do?
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shows you the flags
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What is force quit?
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control c
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When do you use quotes?
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Mainly if there's a space
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What is a space character?
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\
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ls -a
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list the dot files
Ex: .docx .txt |
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What does touch do?
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creates files/updates time stamps
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what's an alias?
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not a real unix command
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wc?
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Word Count
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Will this create a new directory?
cp temp2/directory5? |
no
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what does -r mean?
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recursive / referring back
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What does rm * do?
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removes everything in the folder, but not the directories
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What's the shell called that we're working in now?
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ssh shell
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what does ? do
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matches any single character
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What does [w.e.] do?
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gives a range for numbers or letters
Ex: rm [a-z]at rm chp[1-0] |
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r(ead) w(rite) e(xecute)
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r = 4
w = 2 e = 1 |
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What's a way of changing the permissions without using binary code?
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chmod g(roup)=rwx,u(ser)=rwx,o(ther)=rwx
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du
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disk usage
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date
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print or set the system time or date (don't put a file name after this)
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date "+%y"
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last two digits of the year
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date "+%D"
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02/03/10 mm/dd/yy
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Pico -
get in copy paste save get out |
> pico
> ctl k = kill (cut) > ctl u = unkill (paste) > ctl x = exit and save > press yes. to overwrite and stuff |
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Emacs -
get in copy paste save get out get help |
> no backspace button. delete.
> ctl k = kill (cut) > ctl y = yank (paste) > ctl x + w = save as > ctl z = suspend (exit) > ctl -h = get help |
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Vi -
get in copy paste save get out |
>dd = delete
> copy = yy select w.e > paste = p > :w save as > :q! = quit without saving > :wq = quit and save as something |
