why unix commands can be divided into internal and external
commands?
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Answer / shaili
External- It is a compiled executable of a program.Shell
executes it.
Internal- Built in shell.Faster in execution.
Internal commands provides more flexibility and better
management. But, if all commands are internal, shell will
become larger and less responsive.
| Is This Answer Correct ? | 16 Yes | 1 No |
Answer / ankur
Internal command are built in commands in shell & shell
shell doesn't start a separate process to run internal
commands where as external command require the shell to
fork and exec a process which may take some time on a busy
system
| Is This Answer Correct ? | 7 Yes | 0 No |
Answer / niranjan
Ankur ur right... internal commands dont invoke a child process to excute the command. and there by faster execution.
Where as external commands forked as child process...
| Is This Answer Correct ? | 0 Yes | 0 No |
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Unix Commands 
