Aladdin, or careful what you wish.

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Have you heard of the Linux user called Aladdin? He came across a command called "alias" one day, and the manual told him that it would make his wishes come true - that options that he wanted to be default would be, and that he could even make up his own new commands.

Aladdin felt this was too good to be true, so he created a little alias called "hello" that echoed back "hello to you too". And it worked! Wow!

Now Aladdin had always wanted the rm command (the one that deletes files) to ask if he was sure, so he created an alias to do that ((it's quite easy - the -i option)). And, again, Wow!

But the Aladdin was deleting files and tidying up for the system administrator who was away on holiday in Skeggy, and there were whole big directories of spam that needed deleting. And Aladdin got really rather bored with typing in "Y" hundreds of time .... so his third use of the alias command was to undo what he had done with the second use.

And the moral is ... Aliases can be useful, but the operating system designers probably put rather more thought that you will have done into what's the default, and they probably got it just about right for most of us.

[Advert] Learn more about using Linux ... [/Advert]

(written 2004-12-15, updated 2006-06-05)

Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles

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  [2299] How much space does my directory take - Linux - (2009-07-20)
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  [1651] ls command - favourite options - (2008-05-23)
  [1527] Selecting file names in a shell - one word or another - (2008-02-02)
  [1438] Copy and paste / cut and paste and other vi techniques - (2007-11-20)
  [1408] Wireless hotel tips - FTP and Skype connections failing - (2007-10-26)
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  [1012] Moving files between Windows / DOS and Linux / Unix - (2006-12-30)
  [984] Cardinal numbers and magic numbers - (2006-12-14)
  [749] Cottage industry or production line data handling methods - (2006-06-07)
  [711] THE home directory or MY home directory - (2006-05-06)
  [710] Linux training Glasgow, Python programming course Dundee - (2006-05-05)
  [703] Copying files and preserving ownership - (2006-04-28)
  [679] More or less on the edge of the page - (2006-04-11)
  [659] Web Application Components - (2006-03-28)
  [593] Finding where the disc space has gone - (2006-02-06)
  [431] File permissions of Linux and Unix systems - (2005-08-31)
  [430] Linux commands - some basics - (2005-08-31)
  [249] An easy way out - (2005-03-17)
  [74] pushd and popd - (2004-10-05)
  [73] vi - full circle - (2004-10-04)

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