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Top Forums UNIX for Dummies Questions & Answers Simple question on unix file permission Post 302511744 by luft on Thursday 7th of April 2011 12:33:51 PM
Old 04-07-2011
Simple question on unix file permission

As I understand the file permissions in UNIX is basically

Owner, group, others

Lets assume scott user who's primary group is dev creates a file called test.dat and then grants some privileges on that file...
Code:
scott@unix-host> echo "this is a test" > test.dat
scott@unix-host> chmod 640 test.dat
scott@unix-host> ls -l test.dat

-rw-r-----   1 scott  dev   960 Apr  1  2011 test.dat

Now, let's assume user Tom who's primary group is also dev logs in and tries to delete the test.dat file created by scott..
Code:
tom@unix-host> rm test.dat
test.dat: 640  mode ? (y/n) y

surprisingly, Tom was able to delete the file. I thought only scott user would be able to delete test.dat file as only the "owner" (as in owner,group,others) has "rw" privilege..I'm a bit confused as to how Tom was able to delete the file even though "Group" has only Read access...Could you help me understand this?

Thanks for your time...


Thanks

Last edited by Scott; 04-07-2011 at 08:06 PM.. Reason: Added code tags
 

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MUSTACHE(1)							  Mustache Manual						       MUSTACHE(1)

NAME
mustache -- Mustache processor SYNOPSIS
mustache <YAML> <FILE> mustache --compile <FILE> mustache --tokens <FILE> DESCRIPTION
Mustache is a logic-less templating system for HTML, config files, anything. The mustache command processes a Mustache template preceded by YAML frontmatter from standard input and prints one or more documents to standard output. YAML frontmatter beings with --- on a single line, followed by YAML, ending with another --- on a single line, e.g. --- names: [ {name: chris}, {name: mark}, {name: scott} ] --- If you are unfamiliar with YAML, it is a superset of JSON. Valid JSON should work fine. After the frontmatter should come any valid Mustache template. See mustache(5) for an overview of Mustache templates. For example: {{#names}} Hi {{name}}! {{/names}} Now let's combine them. $ cat data.yml --- names: [ {name: chris}, {name: mark}, {name: scott} ] --- $ cat template.mustache {{#names}} Hi {{name}}! {{/names}} $ cat data.yml template.mustache | mustache Hi chris! Hi mark! Hi scott! If you provide multiple YAML documents (as delimited by ---), your template will be rendered multiple times. Like a mail merge. For example: $ cat data.yml --- name: chris --- name: mark --- name: scott --- $ cat template.mustache Hi {{name}}! $ cat data.yml template.mustache | mustache Hi chris! Hi mark! Hi scott! OPTIONS
By default mustache will try to render a Mustache template using the YAML frontmatter you provide. It can do a few other things, however. -c, --compile Print the compiled Ruby version of a given template. This is the code that is actually used when rendering a template into a string. Useful for debugging but only if you are familiar with Mustache's internals. -t, --tokens Print the tokenized form of a given Mustache template. This can be used to understand how Mustache parses a template. The tokens are handed to a generator which compiles them into a Ruby string. Syntax errors and confused tags, therefor, can probably be identified by examining the tokens produced. INSTALLATION
If you have RubyGems installed: gem install mustache EXAMPLES
$ mustache data.yml template.mustache $ cat data.yml | mustache - template.mustache $ mustache -c template.mustache $ cat <<data | ruby mustache - template.mustache --- name: Bob age: 30 --- data COPYRIGHT
Mustache is Copyright (C) 2009 Chris Wanstrath Original CTemplate by Google SEE ALSO
mustache(5), mustache(7), gem(1), http://mustache.github.com/ DEFUNKT
May 2010 MUSTACHE(1)
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