{"id":1328,"date":"2007-10-25T12:00:00","date_gmt":"2007-10-25T12:00:00","guid":{"rendered":"http:\/\/orcldoug.com\/blog\/?p=1328"},"modified":"2007-10-25T12:00:00","modified_gmt":"2007-10-25T12:00:00","slug":"which","status":"publish","type":"post","link":"http:\/\/orcldoug.com\/blog\/2007\/10\/25\/which\/","title":{"rendered":"Which?"},"content":{"rendered":"

No, I don’t mean the UK consumer organisation, but a simple *nix command. It’s so simple that I’ve hesitated about blogging about it, but when I keep sharing a small snippet of information and people don’t know it and find it useful, it’s probably worth mentioning here.<\/p>\n

If you work on Unix servers, you’ll be familiar with long $PATH settings. Sometimes it’s difficult to tell which particular version of a command you’re using when there are versions scattered around in various locations, some in the PATH and some not. If you want to check which copy of a command you’re running, just use the which<\/a> command. For example, in this PATH (which is pretty short compared to the PATHs on the servers at work)<\/p>\n

[oracle@ISP4400 ~]$ echo $PATH\n\/usr\/kerberos\/bin:\/usr\/local\/bin:\/bin:\/usr\/bin:\/usr\/X11R6\/bin:\/home\/oracle\/bin:\n\/u01\/app\/oracle\/product\/11.1.0\/db_1\/bin<\/pre>\n
if I type in<\/p>\n
[oracle@ISP4400 ~]$ java<\/pre>\n
where is the executable running from? Well, I can check with the which command<\/p>\n
[oracle@ISP4400 ~]$ which java\n\/usr\/bin\/java<\/pre>\n
I apologise to those for whom this is completely obvious, but there are clearly people out there who don’t know this command and I find it useful regularly.<\/p>\n","protected":false},"excerpt":{"rendered":"
No, I don’t mean the UK consumer organisation, but a simple *nix command. It’s so simple that I’ve hesitated about blogging about it, but when I keep sharing a small snippet of information and people don’t know it and find it useful, it’s probably worth mentioning here. If you work on Unix servers, you’ll be… Continue reading Which?<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1328","post","type-post","status-publish","format-standard","hentry","category-uncategorized","entry"],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":1264,"url":"http:\/\/orcldoug.com\/blog\/2007\/05\/06\/re-linking-oracle\/","url_meta":{"origin":1328,"position":0},"title":"Re-linking oracle","date":"May 6, 2007","format":false,"excerpt":"Hooray! 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This one's an old one, so many of you will know about it already, but for those that don't ...In\u2026","rel":"","context":"With 3 comments","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1417,"url":"http:\/\/orcldoug.com\/blog\/2008\/06\/08\/real-application-testing-and-more-relinking\/","url_meta":{"origin":1328,"position":2},"title":"Real Application Testing and more Relinking","date":"June 8, 2008","format":false,"excerpt":"I'd been thinking of blogging about the appearance of Real Application Testing in 10.2.0.4 since I noticed it post-upgrade, just before the course in Prague. Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production With the Partitioning, OLAP, Data Mining and Real Application Testing optionsIt looked like a\u2026","rel":"","context":"With 9 comments","img":{"alt_text":"","src":"\/serendipity\/uploads\/xRAT_7.png.pagespeed.ic.3MsqSFp_gp.png","width":350,"height":200},"classes":[]},{"id":1271,"url":"http:\/\/orcldoug.com\/blog\/2007\/05\/21\/10-2-0-2-listener-bug-new-child-listener-process-forked\/","url_meta":{"origin":1328,"position":3},"title":"10.2.0.2 Listener bug, new child listener process forked","date":"May 21, 2007","format":false,"excerpt":"Today I solved a nasty intermittent problem we'd been having on one of our Production servers so I thought I'd blog about it here in case it saves someone else some pain. The symptoms were 1) No-one was able to connect to the database. 2) There were two listener processes\u2026","rel":"","context":"With 16 comments","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1336,"url":"http:\/\/orcldoug.com\/blog\/2007\/11\/04\/rac-and-aix-continued\/","url_meta":{"origin":1328,"position":4},"title":"RAC and AIX – continued","date":"November 4, 2007","format":false,"excerpt":"If I was to believe Metalink Note 368916.1 (see previous post), then the HACMP software must be installed on the server we were installing 9.2.0.8 on. However, having reviewed \/etc\/inittab and investigating whether cluster services were running, it looked like HACMP wasn't in use. We checked with one of our\u2026","rel":"","context":"Similar post","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":895,"url":"http:\/\/orcldoug.com\/blog\/2005\/12\/07\/oracle-enterprise-manager-10gr2\/","url_meta":{"origin":1328,"position":5},"title":"Oracle Enterprise Manager 10gR2","date":"December 7, 2005","format":false,"excerpt":"First of all, let me be clear that I'm not a fan of GUI tools. That's not based on a misguided macho opinion that somehow you need to be able to struggle with a command line interface to prove that you're a good DBA but because :- I'm a contractor\u2026","rel":"","context":"With 9 comments","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"http:\/\/orcldoug.com\/blog\/wp-json\/wp\/v2\/posts\/1328","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/orcldoug.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/orcldoug.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/orcldoug.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/orcldoug.com\/blog\/wp-json\/wp\/v2\/comments?post=1328"}],"version-history":[{"count":0,"href":"http:\/\/orcldoug.com\/blog\/wp-json\/wp\/v2\/posts\/1328\/revisions"}],"wp:attachment":[{"href":"http:\/\/orcldoug.com\/blog\/wp-json\/wp\/v2\/media?parent=1328"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/orcldoug.com\/blog\/wp-json\/wp\/v2\/categories?post=1328"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/orcldoug.com\/blog\/wp-json\/wp\/v2\/tags?post=1328"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}