null command; returns zero exit status|
read and execute commands in file|
exit from current enclosing for, select, until, or while loop|
exit from nth enclosing for, select, until, or while loop|
change directory to dir(default $HOME)|
change to directory where dir1 in current pathname is substituted with dir2|
change directory to previous directory|
read and execute commands|
perform I/O redirection on file descriptors|
replace current process with command|
exit from current program with exit status of the last command. If given at command prompt, terminate the login shell.|
n|| exit from current program with ...|
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