Linux and Unix Shell Programming

24.1. Complete list of shell built-in commands

Table 24.1 shows a complete list of the standard built-ins.

Table 24.1. Standard built-in commands

:	Null, will always return true
.	Read files from the current shell
break	Exists from a for, while, until or case statement
cd	Change the current directory
continue	Carry on with the next iteration of the loop
echo	Write output to the standard output
eval	Read the argument and execute the resulting command
exec	Execute the command but not in this shell
exit	Exit the shell
export	Export the variables so that they are available to the current shell
pwd	Display the current directory
read	Read a line of text from standard input
readonly	Make this variable read-only
return	Exit the function with a return ...