Which - Revision history

Jimbo: Reverted edits by 82.114.160.35 (Talk); changed back to last version by Jimbo

2007-11-19T17:44:47Z

Reverted edits by 82.114.160.35 (Talk); changed back to last version by Jimbo

Jimbo at 20:47, 25 August 2004

2004-08-25T20:47:41Z

Dave at 19:51, 25 August 2004

2004-08-25T19:51:38Z

Jimbo at 19:17, 25 August 2004

2004-08-25T19:17:38Z

Jimbo at 19:12, 25 August 2004

2004-08-25T19:12:36Z

New page

This is a very useful system command used to find out exactly what is going to get executed when you ask for a command without specifying a path. For instance, the [[csh]] shell has a [[built-in]] function called [[time]], but there is also a version at '''/bin/time'''. So '''which''' one gets executed if you simply type "time"?

'''ph34r#''' which time
'''time: shell built-in command.'''
'''ph34r#'''

See also [[where]] for figuring out how many different versions of the same command or file you have strewn throughout your [[path]].

[[Category:System Commands]]

← Older revision		Revision as of 19:51, 25 August 2004
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−	'''which''' is a very useful system command used to find out exactly what is going to get executed when you ask for a command without specifying a path. For instance, the [[csh]] shell has a [[built-in]] function called [[time]], but there is also a version at '''/usr/bin/time'''. So '''which''' one gets executed if you simply type "time"?	+	'''which''' is a very useful system command used to [[find]] out exactly what is going to get executed when you ask for a command without specifying a path. For instance, the [[csh]] shell has a [[built-in]] function called [[time]], but there is also a version at '''/usr/bin/time'''. So '''which''' one gets executed if you simply type "time"?

	'''ph34r#''' which time		'''ph34r#''' which time

@@ Line 1: / Line 1: @@
 '''which''' is a very useful system command used to [[find]] out exactly what is going to get executed when you ask for a command without specifying a path.  For instance, the [[csh]] shell has a [[built-in]] function called [[time]], but there is also a version at '''/usr/bin/time'''.  So '''which''' one gets executed if you simply type "time"?
-  '''ph34r#''' which time
+  ph34r#''' which time'''
- '''time: shell built-in command.'''
+ time: shell built-in command.
-  '''ph34r#'''
+  ph34r#
 This is particularly useful to know in the case of the [[time]] command above, because [[csh]]'s [[built-in]] "time" does not have the same featureset described in the [[man]] page for [[time]], which is based on the version to be found at '''/usr/bin/time'''.