Udacity lesson 3

Question 1

display information about the existing commits

Answer 1

with cd situate bash in a directory with a repo

git log

Question 2

display information about a given commit

Answer 2

git show

Question 3

“scroll” through the log to see more updates

Answer 3

j or ↓ to move down one line at a time

d to move by half the page screen

f to move by a whole page screen

Question 4

quit the “pager”

Answer 4

q

Question 5

scroll up in Less

Answer 5

k or ↑ to move _up_ one line at a time

u to move by half the page screen

b to move by a whole page screen

Question 6

how to adjust what a command on the command line will do?

Answer 6

use a flag

ls -l

• here -l is a flag

Question 7

how to make the git log output shorter?

Answer 7

use the flag –oneline

Question 8

I want to know which files were changed in the commit. what to do?

Answer 8

git log –stat

Question 9

what do the numbers mean?

Answer 9

number of lines changed (insertion or delition in the line)

Question 10

I want to see what exactly the changes in each commit were. How to do that?

Answer 10

git log -p

or –patch, it’s the same

Question 11

what does this all mean?

Answer 11

diff: difference between the original and the changed versions of the file

a and b are for the first and the second versions of the file. The file is .css, it’s written there

index: the hash of the file before the change and after the change

@@ shows where in the file the edits were made: first what were the lines in the original file (the sequence began at line 38 and lasted 6 lines), the second one - where the lines are in the edited file (begins at 38, lasts 11 lines)

lines in green and with + mean these lines were the actual change, they were added

Question 12

only look at the specific commit, not on all the commits

Answer 12

git log -whatever_flag first_7_characters_of_SHA

but will show all the commits before this one too

or

git show _flag first_7_characters_of_SHA