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Running Built-ins in current shell

 
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Top Forums UNIX for Dummies Questions & Answers Running Built-ins in current shell
# 1  
Old 12-10-2008
Running Built-ins in current shell
Hi,

Can any one please describe why I am not able to run any built-in commands in current shell?

Thanks.
# 2  
Old 12-10-2008
Do you mind giving a bit more info like which shell, commands you use and which errors you get?
# 3  
Old 12-10-2008
For running in current shell, I issued the command in this way,
. /usr/bin/ls
or
source ls
# 4  
Old 12-10-2008
Quote:
For running in current shell, I issued the command in this way,
. /usr/bin/ls
or
source ls
You cannot source /usr/bin/ls unless you have replaced the /usr/bin/ls executable with a shell script. It is a standalone executable.

What shell are you using?
# 5  
Old 12-10-2008
I am using ksh.

Then Why cann't I run the command using . /bin/ls?
# 6  
Old 12-10-2008
Because sourcing an executable i.e. /bin/ls is not supported by any shell that I know of. You can only source a shell script.

Shell builtins and sourcing a shell script are two different things. To see the list of builtins available for your particular version of ksh simply type "builtin" at the shell prompt.
 
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