Differences between version 2 and previous revision of ShellBuiltinNotes.
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| Newer page: | version 2 | Last edited on Thursday, August 16, 2007 8:03:15 pm | by BenStaz | Revert |
| Older page: | version 1 | Last edited on Thursday, August 16, 2007 7:17:33 pm | by BenStaz | Revert |
@@ -4,10 +4,19 @@
*type <command_name>
<verbatim>
-staz@tokra:~/test
$ type cd
+$ type cd
cd is a shell builtin
-staz@tokra:~/test
$ type mkdir
+$ type mkdir
mkdir is /bin/mkdir
</verbatim>
+
+!But I want to use an external program rather than a shell-builtin.
+
+If a command specified to the shell contains a slash ''/'', the shell will not execute a builtin command. Thus, while specifying ''echo'' causes a builtin command to be executed under shells that support the builtin echo command, specifying ''/bin/echo'' does not.
+
+!Why can I not use ''sudo <shell_builtin>'' ?
+
+A shell builtin is not an executable file so sudo does not know about it.
+You will need to use the command ''sudo -s'' to get a new shell with root privileges or alternatively you can do ''sudo bash -c "<shell_builtin>" [args]''.
