diskutil Disk utilities - Format, Verify, Repair
ditto Copy files and folders
dscl Directory Service command line utility
du Estimate file space usage
echo Display message on screen
ed A line-oriented text editor (edlin)
enable Stop or start printers and classes.
env Set environment and run a utility
eval Evaluate several commands/arguments
exec Execute a command
exit Exit the shell
expect Programmed dialogue with interactive programs
Also see AppleScript
expand Convert tabs to spaces
expr Evaluate expressions
false Do nothing, unsuccessfully
fdisk Partition table manipulator for Darwin UFS/HFS/DOS
find Search for files that meet a desired criteria
fmt Reformat paragraph text
fold Wrap text to fit a specified width
for Expand words, and execute commands
foreach Loop, expand words, and execute commands
fsck Filesystem consistency check and repair
fsaclctl Filesystem enable/disable ACL support
fs_usage Filesystem usage (process/pathname)
ftp Internet file transfer program
GetFileInfo Get attributes of HFS+ files
getopt Parse positional parameters
goto Jump to label and continue execution
grep Search file(s) for lines that match a given pattern
groups Print group names a user is in
gzip Compress or decompress files
head Display the first lines of a file
hdiutil Manipulate iso disk images
history Command History
hostname Print or set system name
id Print user and group names/id's