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Top Forums UNIX for Dummies Questions & Answers Why Do You Need the Explicit Pathname to Execute? Post 302738139 by sudon't on Friday 30th of November 2012 11:47:47 AM
Old 11-30-2012
Quote:
Originally Posted by vbe
About " . ":
If you are a ordinary user or you can afford adding . in your $PATH (and understand its possible consequences...) at the condition its at the end of your PATH variable ( for security reason already mentionned ), if you were a developper you would I imagine create a bin directory in your $HOME and add that to your PATH variable instead, avoiding like that the risk of being spoofed...
About /usr/local/bin: Trust what the mods above already mentionned, since /usr/local/bin is set in PATH by default on most systems, it is not a good idea at all to let people other than root add new programs..., I for instance dont even trust the content.. and so remove /usr/local/bin from my PATH, and if I need a program that is there I check before its content.. You can always use aliases to your executable with fancy long absolute paths...

I saw a hole production fail for 5 weeks because someone not listening to what I said add . at the beginning of PATH in /etc/profile...
The side effects can be disastrous...
My situation is a little different. I'm just learning about unix and shell scripting at home on my Mac. Since the scripts I'm writing are useless except to learn how they work, I will never add them to my PATH. It's also rare that anyone else uses my computer. So it's convenient to write them in a sub-directory of my home directory, where I can execute them immediately after writing them, just to see that they work, and immediately go back to edit them. It's no problem to prepend dot-slash, and no need to alter my current PATH. I didn't see this as a problem, but because I'm a newb, things are not always obvious to me, and I wonder why some things are the way they are.
 

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FILECAP:(8)						  System Administration Utilities					       FILECAP:(8)

NAME
filecap - a program to see capabilities SYNOPSIS
filecap [ -a | -d | /dir | /dir/file [cap1 cap2 ...] ] DESCRIPTION
filecap is a program that prints out a report of programs with file based capabilities. If a file is not in the report or there is no report at all, no capabilities were found. For expedience, the default is to check only the directories in the PATH environmental variable. If the -a command line option is given, then all directories will be checked. If a directory is passed, it will recursively check that directory. If a path to a file is given, it will only check that file. If the path to the file includes capabilities, then they are written to the file. OPTIONS
-a This tells the program to show all capabilities starting from the / directory. Normally the PATH environmental variable is used to show you capabilities on files you are likely to execute. -d This dumps all capabilities for reference. EXAMPLES
To check file capabilities in $PATH: filecap To check file capabilities of whole system: filecap -a To check file capabilities recursively in a directory: filecap /usr To check file capabilities of a specific program: filecap /bin/passwd To list all possible capabilities: filecap -d To set a file capability on a specific program: filecap /bin/ping net_raw net_admin SEE ALSO
pscap(8), netcap(8), capabilities(7). AUTHOR
Steve Grubb Red Hat March 2009 FILECAP:(8)
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