Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
IT 244
| Question | Answer |
|---|---|
| What command would you use to keep a record of every command you type and the output of those commands? | script |
| What key would you press to get the last command you typed? | up arrow |
| What keys would you hit to go to the beginning of the command line? | Control A |
| How do you you abort a running program? | Control C |
| What would you type at the command line to get the man page for the ls command? | man ls |
| If you wanted to use one of the characters that have special meaning to Unix in a filename, what TWO things could you do? | put a backslash in front of it or quote it |
| What would you type on the command line if you wanted to go to the directory /home? | cd /home |
| What would you type at the command line to delete the file named memo.txt? | rm memo.txt |
| What would you type at the command line to copy the file named memo.txt to memo.bak? | cp memo.txt memo.bak |
| What would you type at the command line to move the file named memo.txt into the directory named work? | mv memo.txt work |
| What key would you press to get the last command you typed? | ↑ |
| What keys would you hit to go to the end of the command line? | Control E |
| What is the text editor used by most system administrators? | vi or vim |
| How do you get the next screenfull when using man? | hit the Space bar |
| How do you exit the man program? | hit q |
| What is the other program, besides man, that you can use to get help? | info |
| Name the three whitespace characters. | Space, Tab and newline (Enter or Return) |
| What would you type on the command line if you wanted to go to the directory /courses? | cd /courses |
| What would you type at the command line to see what directory you are currently in? | pwd |
| What would you type at the command line to see ALL the files in the directory named /home/ghoffman? | ls -a /home/ghoffman |
| What would you type at the command line to print to the screen the contents of the file named memo.txt? | cat memo.txt |
| What would you type at the command line to create a directory named work? | mkdir work |
| What would you type at the command line if you wanted to see the value of the variable SHELL? | echo SHELL |
| What would you type at the command line if you wanted to know the network name of the Unix computer you were using? | hostname |
| Name one of the two pager programs that allow you to read a long file one screenful at a time. | more or less |
| If you started typing the name of a file on the command line and wanted Unix to supply the rest, what would you do? | hit the Tab key |
| What would you type at the command line if you wanted to find all lines in the file results.txt that contained the word "homework"? | grep homework results.txt |
| What would you type at the command line if you wanted to find all lines in the file results.txt that DID NOT contain the word "homework"? | grep -v homework results.txt |
| What would you type at the command line if you wanted to see the FIRST 10 lines of the file log.txt? | head log.txt |
| What would you type at the command line if you wanted to see the LAST 10 lines of the file log.txt? | tail log.txt |
| What would you type at the command line if you wanted to see all the lines in the file results.txt in sorted order? | sort results.txt |
| What would you type at the command line if you wanted to see all the lines in numbers.txt sorted in REVERSE NUMERIC order? | sort -nr numbers.txt |
| If you saw the following prompt, what USER was logged into the machine? | it244gh |
| If you saw the following prompt, what was the HOSTNAME of the machine? | vm75 |
| If you saw the following prompt, what is your CURRENT DIRECTORY? | /courses/it244/s19/ghoffman |
| What would you type at the command line if your wanted to find all lines in the file red_sox.txt that had the word "Win", but NOT the word "Rays"? | grep Win red_sox.txt | grep -v Rays |
| What would you type at the command line if your wanted to find all lines in the file red_sox.txt that had the word "Win", but NOT the word "Rays", and have the lines sorted alphabetically? | grep Win red_sox.txt | grep -v Rays | sort |
| What command would you use to find the date and time? | date |
| What program would you use to find where the program file for tar is located? | which or whereis |
| What would you type at the command line if you wanted to find all files with "link" as part of their name? | locate link |
| What command would you use to find out all the users currently logged on to the machine you are using? | finger or who |
| What would you type at the command line if you wanted to find out all you could about the user with account name wombat? | finger wombat |
| What is the name of the directory at the top of the Unix filesystem? | root |
| What symbol is used to represent the top of the Unix filesystem? | / |
| What do you call the directory directly above your current directory? | the parent directory |
| What do you call a directory inside your current directory? | a child directory |
| What would you type at the terminal to go to the top of the hierarchical file system? | cd / |
| Can you have two files with the same name in the same directory? | no! |
| Can you have two files named memo.txt and Memo.txt in the same directory? | yes. the filenames are different because Unix is case sensitive |
| Does Unix recognize filename extensions? | no |
| What directory are you in when you first log in to a Unix machine? | your home directory |
| In what directory is YOUR home directory located? | /home |
| What do you call a text file containing Unix commands that are run just before the shell gives you a prompt? | a startup file |
| Where are the files mentioned above located? | in your home directory |
| If you entered the following at the command line, where would you be? cd ~ | your home directory |
| If you entered the following at the command line, where would you be? cd ~ghoffman | in the home directory of ghoffman |
| What does the . (dot) in your current directory mean? | your current directory |
| What does the .. (dot dot) in your current directory mean? | the parent directory of your current directory |
| What do you call the list of directories you must go through to get from one directory to another? | a path |
| What directory is the starting point for EVERY absolute path? | the root directory |
| What directory is the starting point for a relative path? | the current directory |
| What character is used to separate directory and filenames in a path? | / |
| What would you type at the command line if you wanted to see the value of the variable SHELL? | echo $SHELL |
| If you started typing the name of a file on the command line and wanted Unix to supply the rest, what would you do? | hit the tab key |
| What would you type at the command line if you wanted to find all lines in the file results.txt that contained the word "homework"? | grep homework results.txt |
| What would you type at the command line if you wanted to find all lines in the file results.txt that DID NOT contain the word "homework"? | grep -v homework results.txt |
| What would you type at the command line if you wanted to see all the lines in numbers.txt sorted in REVERSE NUMERIC order? | sort -nr numbers.txt |
| If you saw the following prompt, what is your CURRENT DIRECTORY? it244gh@vm75:/courses/it244/s19/ghoffman$ | /courses/it244/s19/ghoffman |
| What would you type at the command line if your wanted to find all lines in the file red_sox.txt that had the word "Win", but NOT the word "Rays"? | grep Win red_sox.txt | grep -v Rays |
| What would you type at the command line if your wanted to find all lines in the file red_sox.txt that had the word "Win", but NOT the word "Rays", and have the lines sorted alphabetically? | grep Win red_sox.txt | grep -v Rays | sort |
| What program would you use to find where the program file for tar is located? | which or whereis |
| What command would you use to find out all the users currently logged on to the machine you are using? | finger or who |
| By default, which account is the owner of a file or directory? | the account that created it |
| Name the three types of access permissions. | read, write, and execute |
| Name the three categories of accounts which are used in assigning access permissions. | owner, group, and everyone else |
| Who can change the access permissions on a file or directory? | only the owner |
| What would you enter on the command line if you wanted to see the access permissions of entries in your current directory? | ls -l |
| What is the name of the command you would use to change the access permissions for a file or directory? | chmod |
| Three numbers can be used to specify access permissions when using the command above. Each of these numbers can only be in a certain range. What is the maximum and minimum for each of these three numbers? | 0 to 7 |
| If the file work.sh has the permissions given below, what could the owner of the file do? -rwxr-x--x 1 ghoffman grad 0 Sep 27 11:08 work.sh | read, write, and execute |
| For this file, what could the group do? -rwxr-x--x 1 ghoffman grad 0 Sep 27 11:08 work.sh | read and execute |
| For this file, what could every "other" account do? -rwxr-x--x 1 ghoffman grad 0 Sep 27 11:08 work.sh | only execute |
| What chmod command gives Owner, Group, and Everyone read/write permissions to notes.txt? | chmod 666 notes.txt |
| What chmod command gives Owner read/write and Group/Everyone read permissions to work/notes.txt? | chmod 644 work/notes.txt |
| What chmod command gives Owner read/write, Group read, and Everyone no permissions to it244/work/notes.txt? | chmod 640 it244/work/notes.txt |
| What chmod command gives Owner read/write/execute, Group read/execute, and Everyone read/execute permissions to work/label_now.sh? | chmod 755 work/label_now.sh |
| What chmod command gives Owner all permissions, Group read/execute, and Everyone no permissions to it244/work/label_now.sh? | chmod 750 it244/work/label_now.sh |
| What chmod command gives Owner write/execute, Group execute, and Everyone execute permissions to work/label? | chmod 311 work/label |
| What chmod command gives Owner all permissions, Group execute, and Everyone execute permissions to it244/work/label? | chmod 711 it244/work/label |
| What chmod command gives Owner read/execute, Group execute, and Everyone no permissions to ~ghoffman/it244/work/label? | chmod 510 ~ghoffman/it244/work/label |
| What chmod command gives Owner, Group, and Everyone all permissions to dir1? | chmod 777 dir1 |
| What chmod command gives Owner ls/create/delete/cd permissions, Group ls/cd permissions, and Everyone ls permissions to dir1/dir2? | chmod 754 dir1/dir2 |
| What chmod command gives Owner ls/cd permissions, Group ls/cd permissions, and Everyone no permissions to ~ghoffman/dir3? | chmod 550 ~ghoffman/dir3 |
| What chmod command gives Owner ls/cd permissions, Group cd permissions, and Everyone ls permissions to dir5? | chmod 514 dir5 |
| What does the PATH shell variable contain? | the list of directories the shell must search to find the file to run a command |
| In a for ... in loop, where does the loop variable get its values? | from the list of values following the keyword in |
| In a simple for loop, where does the loop variable get its values? | from the command line arguments |
| Should the loop variable in a for loop have a $ in front of it? | no |
| In a three statement for loop, what does the first statement do? | sets the initial value of a loop variable |
| In a three statement for loop, what does the second statement do? | it's a logical expression and the loop will continue as long as its value is true |
| In a three statement for loop, what does the third statement do? | changes the value of the loop variable after each pass through the loop |
| Why are the three statements in a three statement for loop surrounded by two parentheses? | so the values of all variables will be treated as numbers |
| When does a while loop stop running? | when the command following while returns an exit status that is not 0 |
| what does the continue command in a loop do? | stops that pass through the loop and returns to the top of the loop |
| What does the break command in a loop do? | jumps completely out of the loop |
Created by:
sumnerss
Popular Computers sets