Path of this command

mah454 · 12-08-2009, 01:41 AM

Hello ...

Where is PATH of this commands:

Code:

while,do,done,for,if,fi,then,case,esac,...

My distro is Ubuntu 9.04

EricTRA · 12-08-2009, 01:47 AM

Hello,

These are not commands, they are loops used in scripts and programming tasks. Have a look at Bash Guide for Beginners for more detailed explanation. If you want to find the path to a command, like rm for example you can use:

Code:

which <commandname>

and it will show you its path. But gain, what you're stating here are not commands. They are built-in in the bash shell for one.

Kind regards,

Eric

catkin · 12-08-2009, 02:07 AM

They are not commands by shell keywords, as shown by the type command

Code:

c:~/d/src/linux-2.6.29.6$ type while do done for if fi then case esac
while is a shell keyword
do is a shell keyword
done is a shell keyword
for is a shell keyword
if is a shell keyword
fi is a shell keyword
then is a shell keyword
case is a shell keyword
esac is a shell keyword

According to the Linux Documentation Project: "A keyword is a reserved word, token or operator. Keywords have a special meaning to the shell, and indeed are the building blocks of the shell's syntax. As examples, for, while, do, and ! are keywords. Similar to a builtin, a keyword is hard-coded into Bash, but unlike a builtin, a keyword is not in itself a command, but a subunit of a command construct".