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% - Resume job in foreground.
(( ... )) - Evaluate arithmetic expression.
. - 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.