Refactor: change "folder" to "directory" where needed.

This commit fixes every instance in which the word "folder" is
incorrectly used instead of "directory".

pages/osx/ditto.md

@@ -1,8 +1,8 @@
 # ditto
 
-> Copy files and folders.
+> Copy files and directories.
 
-- Overwrite contents of destination folder with contents of source folder:
+- Overwrite contents of destination directory with contents of source directory:
 
 `ditto {{path/to/source}} {{path/to/destination}}`
 
@@ -10,6 +10,6 @@
 
 `ditto -V {{path/to/source}} {{path/to/destination}}`
 
-- Copy a given file or folder, while retaining the original file permissions:
+- Copy a given file or directory, while retaining the original file permissions:
 
 `ditto -rsrc {{path/to/source}} {{path/to/destination}}`

pages/osx/drutil.md

@@ -6,6 +6,6 @@
 
 `drutil eject`
 
-- Burn a folder as an ISO9660 filesystem onto a DVD. Don't verify and eject when complete:
+- Burn a directory as an ISO9660 filesystem onto a DVD. Don't verify and eject when complete:
 
 `drutil burn -noverify -eject -iso9660`

pages/osx/du.md

@@ -1,27 +1,27 @@
 # du
 
-> Disk usage: estimate and summarize file and folder space usage.
+> Disk usage: estimate and summarize file and directory space usage.
 
-- List the sizes of a folder and any subfolders, in the given unit (KB/MB/GB):
+- List the sizes of a directory and any subdirectories, in the given unit (KB/MB/GB):
 
-`du -{{k|m|g}} {{path/to/folder}}`
+`du -{{k|m|g}} {{path/to/directory}}`
 
-- List the sizes of a folder and any subfolders, in human-readable form (i.e. auto-selecting the appropriate unit for each size):
+- List the sizes of a directory and any subdirectories, in human-readable form (i.e. auto-selecting the appropriate unit for each size):
 
-`du -h {{path/to/folder}}`
+`du -h {{path/to/directory}}`
 
-- Show the size of a single folder, in human readable units:
+- Show the size of a single directory, in human readable units:
 
-`du -sh {{path/to/folder}}`
+`du -sh {{path/to/directory}}`
 
-- List the human-readable sizes of a folder and of all the files and folders within it:
+- List the human-readable sizes of a directory and of all the files and directories within it:
 
-`du -ah {{path/to/folder}}`
+`du -ah {{path/to/directory}}`
 
-- List the human-readable sizes of a folder and any subfolders, up to N levels deep:
+- List the human-readable sizes of a directory and any subdirectories, up to N levels deep:
 
-`du -h -d {{N}} {{path/to/folder}}`
+`du -h -d {{N}} {{path/to/directory}}`
 
-- List the human-readable size of all .jpg files in subfolders of the current folder, and show a cumulative total at the end:
+- List the human-readable size of all .jpg files in subdirectories of the current directory, and show a cumulative total at the end:
 
 `du -ch */*.jpg`

pages/osx/sips.md

@@ -15,7 +15,7 @@
 
 `sips -Z {{1920}} {{300}} {{image.ext}}`
 
-- Resample all images in a folder to fit a width of 960px (honoring aspect ratio):
+- Resample all images in a directory to fit a width of 960px (honoring aspect ratio):
 
 `sips --resampleWidth {{960}} {{path/to/images}}`
 

pages/osx/tree.md

@@ -18,7 +18,7 @@
 
 `tree -i -f`
 
-- Print the size of each node next to it, in human-readable format, with folders displaying their cumulative size (as in the `du` command):
+- Print the size of each node next to it, in human-readable format, with directories displaying their cumulative size (as in the `du` command):
 
 `tree -s -h --du`