Bash Shell's built-in commands and reserved words

Reprinted from: http://blog.chinaunix.net/uid-25880122-id-2941630.html

command	meaning
!	Reserved words, logical NOT
:	Do not do anything, only parameter expansion
.	Read the file and execute it in the shell
alias	Set command or command alias
bg	The job runs in the background
bind	The key sequence readline function or macro bundle
break	Reserved words, out for, while, until, select the cycle
builtin	Invoke the command built-in command format, and disable the function of the same name. Or command the same name extensions
case	Reserved word, multiple choice
cd	Switch the current working directory
command	Find out the built-in and external commands; look for built-in command rather than a function of the same name
continue	Reserved words, to reach the next for, while, until, select the cycle
declare	Declare variables define the variable properties
dirs	Displays the current list of stored
disown	The job is removed from the list
do	Part of a reserved word, for, while, until, select the cycle
done	Part of a reserved word, for, while, until, select the cycle
echo	Print parameters
elif	Part of reserved words, if the structure of
else	Part of reserved words, if the structure of
enable	Open and close the built-in command
esac	Part of reserved words, case of
eval	The process parameters as command again again
exec	Substituted shell as a shell in a specific program or change I / O
exit	Exit shell
export	Declaring a variable as environment variable
fc	Run with command history
fg	The job runs in the background
be	Part of reserved words, if the cycle
for	Part of reserved words, for loop
function	The definition of a function
getops	Handling command-line options
hash	Record command and specify the path name
help	Built-in command to display help information
history	Display historical information
if	Part of reserved words, if the cycle
in	Part of a reserved word, case, for, select the cycle
jobs	Display running in the background job
kill	Transmit signals to processes
let	The variable perform arithmetic operations
local	Define local variables
logout	Log off from the Shell
popd	Pops the directory from the directory stack
pushd	The directory pushed onto the stack
pwd	Displays the current working directory
read	Reads a line from the standard input
readonly	The variable is defined as read-only
return	Return from the function or script
select	保留字，生成菜单
set	设置Shell选项
shift	变换命令行参数
suspend	终止Shell的执行
test	评估条件表达式
then	保留字，if结构的一部分
time	保留字，输出统计出来的命令执行时间，其输出格式由TIMEFORMAT变量来控制
times	针对Shell及其子Shell，显示用户和系统CPU的时间和
trap	设置扑捉程序
type	确定命令的源
typeset	声明变量，定义变量属性，与declare等价
ulimit	设置和显示进程占用的资源限制
umask	设置和显示文件权限码
unalias	取消别名定义
unset	取消变量或函数定义
until	保留字，一种循环结构
wait	等待后台作业完成
while	保留字，一种循环结构