The professional way to use chmod ?


 
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# 1  
Old 11-18-2015
The professional way to use chmod ?

Oracle Linux 6.4 with bash

Question from a beginner

To change permissions using chmod, I can use 2 methods. Since I don't know the terminology, I am calling them Method1 and Method2.
In the below example, both Method1 and Method2 do the same thing. Which one is you favourite method ?

# Giving execute privilege to the group

Method1.
Code:
$ touch file1.txt
	$
	$ ls -l file1.txt
	-rw-rw-r-- 1 ctms ctms 0 Nov 18 10:21 file1.txt
	$
	$ chmod g+x file1.txt

Method2.

Code:
$ touch file2.txt
	$
	$ ls -l file2.txt
	-rw-rw-r-- 1 ctms ctms 0 Nov 18 10:21 file2.txt
	$
	$ chmod 774 file2.txt
	$
	$ ls -l file2.txt
	-rwxrwxr-- 1 ctms ctms 0 Nov 18 10:21 file2.txt

# 2  
Old 11-18-2015
I don't think there's a reason to prefer one to the other; they are equivalent...
This User Gave Thanks to RudiC For This Post:
# 3  
Old 11-18-2015
Method1 sets just selected permission bits:
g+x -> set the x bit for group.
ug+x -> set the x bits for user and group.
o-x -> clear the x bit for others.
Method2 sets all permission bits. The bits that are not set are cleared.

Code:
chmod 774

is identical with
Code:
chmod ug+rwx,o+r-wx

This User Gave Thanks to MadeInGermany For This Post:
# 4  
Old 11-18-2015
Ok. Please Ignore the word 'professional' .
Which method do you use ? Consider this as a poll . BTW what are Method1 and Method2 called (terminology) ?
# 5  
Old 11-18-2015
Hello omega3,

If you needed a POLL there is an option to create a thread as a POLL. Also I am completely satisfy with MadeInGermany's explanation. Just adding if you could need more information, you can go through the following links too.
https://www.linux.com/learn/tutorial...le-permissions
File Permissions - chmod | Linux.org


May be helpful for you, and using the commands it is completely up to the person which method they use both will complete your task.


Thanks,
R. Singh
# 6  
Old 11-20-2015
The two methods are called SYMBOLIC and NUMERIC respectively.
This User Gave Thanks to fpmurphy For This Post:
 
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