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In ubuntu, I use a program written by others. This program creates a file on my system and try to read and write it later. But the permission of the file it creates is read-only. How can I change the default permission when creating a file in ubuntu, in home folder. Thanks ahead.

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It depends on the program you use. The program would create a file and set its permissions. So, unless you change the source code, you can't do much other than manually changing the permissions. –  green7 Apr 17 '13 at 15:31
    
I tried to create a file by using vi. The owner is me. Files created by the program belong to root. Can I do something to change that? –  user1524111 Apr 17 '13 at 15:36
    
Post the output of umask. –  green7 Apr 17 '13 at 15:59
    
the output is 0002 –  user1524111 Apr 17 '13 at 18:10
    
And the output of echo $USERNAME? Also, what command do you use to create a file using vi ? –  green7 Apr 17 '13 at 18:20

1 Answer 1

I got the answer with green7's help. When I use sudo with other commands, the owner is root and when I use command without sudo, the owner is me.

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