Add Caching Credentials as a git til.

README.md

@@ -32,6 +32,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 
 - [Accessing a Lost Commit](git/accessing-a-lost-commit.md)
 - [Amend Author Of Previous Commit](git/amend-author-of-previous-commit.md)
+- [Caching Credentials](git/caching-credentials.md)
 - [Checkout Old Version Of A File](git/checkout-old-version-of-a-file.md)
 - [Checkout Previous Branch](git/checkout-previous-branch.md)
 - [Clean Out All Local Branches](git/clean-out-all-local-branches.md)

git/caching-credentials.md

@@ -0,0 +1,23 @@
+# Caching Credentials
+
+When public key authentication isn't an option, you may find yourself typing
+your password over and over when pushing to and pulling from a remote git
+repository. This can get tedious. You can get around it, though, by
+configuring git to cache your credentials. Add the following lines to the
+`.git/config` file of the particular project.
+
+```
+[credential]
+    helper = cache --timeout=300
+```
+
+This will tell git to cache your credentials for 5 minutes. Use a much
+larger number of seconds (e.g. 604800) to cache for longer.
+
+Alternatively, you can execute the command from the command line like so:
+
+```bash
+$ git config credential.helper 'cache --timeout=300'
+```
+
+[source](http://git-scm.com/docs/git-credential-cache)