IT 244: Introduction to Linux/Unix

IT 244: Introduction to Linux/Unix
Quiz 2 Answers

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
```