How to see which files were changed in last commit

In this commit message, it says that 2 files have been changed.

$ git commit -m "fixed .gitignore"
[master c30afbe] fixed .gitignore
 Committer: Sahand Zarrinkoub <sahandzarrinkoub@n133-p41.eduroam.kth.se>
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 2 files changed, 5 insertions(+), 4 deletions(-)

This is a little surprising for me. I thought I'd only staged one file to be changed. Now, I'd like to see which files have been changed and how. What is the way to do this?

Get all changed files since last commit

git diff --name-only HEAD HEAD~1

You can try git log --stat

Here --stat will display the number of insertions and deletions to each file altered by each commit.

Example: Below commit added 67 lines to the Demo.java file and removed 38 lines:

commit f2a238924456ca1d4947662928218a06d39068c3
Author: X <X@example.com>
Date: Fri May 21 15:17:28 2020 -0500
Add a new feature
Demo.java | 105 ++++++++++++++++++++++++-----------------
1 file changed, 67 insertion(+), 38 deletions(-)

You can do this in a number of ways. This is what I came up with without looking into docs.

$ git log -1 --name-only

commit 3c60430b752bca26bd3c80604df87ffb2ae358 (HEAD -> master, origin/master, origin/HEAD)
Author: Name Surname <name.surname@email.com>
Date:   Mon Apr 2 18:17:25 2018 +0200

    Example commit

.gitignore
README
src/main.c

Or:

$ git log -1 --name-only --oneline

commit 3c60430 (HEAD -> master, origin/master, origin/HEAD) Example commit
.gitignore
README
src/main.c

Or:

$ git log -1 --stat --oneline

commit 3c60430 (HEAD -> master, origin/master, origin/HEAD) Example commit
.gitignore |  2 ++
README     |  8 ++++++++
src/main.c | 12 ++++++++++++
3 files changed, 22 insertions(+)

In addition to Nitin Bisht's answer you can use the following:

git log -1 --stat --oneline

It will show condensed information on which files were changed in last commit. Naturally, instead of "-1" there can by any number of commits specified to show files changed in last "-n" commits.

Also you can skip merged commits passing "--no-merges" flag:

git log -1 --stat --oneline --no-merges

git log  // this will give you the hash-code 
git show hash-code   

git diff-tree --no-commit-id --name-only <commit_hash>