. - Execute commands from a file in the current shell.
: - Null command
[ - Evaluate conditional expression
[[ ... ]] - Execute conditional command
alias - Define or display aliases
bg - Move jobs to the background
bind - Set Readline key bindings and variables
break - Exit for, while, or until loops
builtin - Execute shell builtins
caller - Return the context of the current subroutine call
case - Execute commands based on pattern matching
cd - Change the shell working directory
command - Execute a simple command or display information about commands
compgen - Display possible completions depending on the options
complete - Specify how arguments are to be completed by Readline
compopt - Modify or display completion options
continue - Resume for, while, or until loops
coproc - Create a coprocess named NAME
declare - Set variable values and attributes
dirs - Display directory stack
disown - Remove jobs from current shell
echo - Write arguments to the standard output
enable - Enable and disable shell builtins
eval - Execute arguments as a shell command
exec - Replace the shell with the given command
exit - Exit the shell
export - Set export attribute for shell variables
false - Return an unsuccessful result
fc - Display or execute commands from the history list
fg - Move job to the foreground
for - Execute commands for each member in a list
for (( - Arithmetic for loop
function - Define shell function
getopts - Parse option arguments
hash - Remember or display program locations
help - Display information about builtin commands
history - Display or manipulate the history list
if - Execute commands based on conditional
jobs - Display status of jobs
kill - Send a signal to a job
let - Evaluate arithmetic expressions
local - Define local variables
logout - Exit a login shell
mapfile - Read lines from the standard input into an indexed array variable
popd - Remove directories from stack
printf - Formats and prints ARGUMENTS under control of the FORMAT
pushd - Add directories to stack
pwd - Print the name of the current working directory
read - Read a line from the standard input and split it into fields
readarray - Read lines from a file into an array variable
readonly - Mark shell variables as unchangeable
return - Return from a shell function
select - Select words from a list and execute commands
set - Set or unset values of shell options and positional parameters
shift - Shift positional parameters
shopt - Set and unset shell options
source - Execute commands from a file in the current shell
suspend - Suspend shell execution
test - Evaluate conditional expression
time - Report time consumed by pipeline's execution
times - Display process times
trap - Trap signals and other events
true - Return a successful result
type - Display information about command type
typeset - Set variable values and attributes
ulimit - Modify shell resource limits
umask - Display or set file mode mask
unalias - Remove each NAME from the list of defined aliases
unset - Unset values and attributes of shell variables and functions
until - Execute commands as long as a test does not succeed
variables - Common shell variable names and usage
wait - Wait for job completion and return exit status
while - Execute commands as long as a test succeeds
{ ... } - Group commands as a unit