The flashcards below were created by user Tjr31 on FreezingBlue Flashcards.

  1. why do scripting
    • automated maintenance
    • automated reports
    • schedule when needed
  2. What kind of command language
    interpreted command language
  3. How many shell script UNIX commands to preform a task
    It can contain multiple commands
  4. An executable premission and is in the path name. What do you write at the command prompt
    $ myfile
  5. If it had executable permission and is not in the path name, how do you specify the path
    $ ./myfile
  6. It does not have executable permission
    $ sh myfile
  7. To make it an executable file
    for everyone
  8. for the owner
  9. for the group
  10. others outside the group
  11. File permissions
  12. write
  13. execute
  14. none
  15. permissions can be
  16. denied
  17. explicitly set
  18. to view current permissions
    ls -l
  19. to change premissions
  20. All programs including scripts can be written using a combination of 3 structures.
    execute the commands in order
  21. selection
    • if then or if then else statements
    • test for a criteria
  22. looping
    repeat a set of instructions, until the criteria is met and number of times
  23. cat -n
    the files with line numbers
  24. in the file what does this mean #
    Its a comment line and not executed
  25. what does command display
    current date and time
  26. pwd
    current working directory
  27. wc
    count words lines and characters
  28. cp
    copy a file
  29. echo"any text"
    displays the info after the echo
  30. echo "no text"
    makes blank line
  31. read var1 [var2 var3]
    accepts the keyboard data and places it in one or more variables
  32. how to use data in a variable
  33. exit[number]
    • end of the program and stop it
    • can assign error code of 0 means successful
  34. what is a variable
    • a memory location that has a name and stores a piece of data called a value
    • can store text, number or other type of data
  35. can a variable be changed in a script as it runs
  36. what is iggnored by unix
  37. Run the script and save the data in a file, overwriting any data already in the file
    $ sh won3> capturefile
  38. •Run the script and save the data in a file, appending the data at the end of any data already in the file
    $ sh won3>> capturefile
  39. •Run the script, display the data to the screen and save the data in a file, overwriting any data already in the file
    $ sh won3 | tee capturefile
  40. when running $ sh box 10 20 each is assigned a variable number
    • $ is value box
    • $1 is vlue 10
  41. reads commands but doesn’t execute them
    sh -n
  42. shows the shell input lines as they are read
    sh -v
  43. shows the commands and their arguments as they are executed
    sh -x
Card Set:
2010-12-01 04:27:38

part 1
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