using umask to set default file settings
48082
umask in RHEL 6
132955
Why are .goutputstream-xxxxx files created in home folder?
3903
How do I set environment variables?
29066
Set standard file browser for "open containing folder"
133203
How to change default action for file types?
29943
how can I change file association globally?
1661
How do I set the default program?
28196
Globally associate file type with certain application
141811
How to set default opening folder for Nautilus file manager?
104283
How do I set the default file association in Ubuntu Nautilus to something that is not listed in the Open With tab?
158079
Change default saving folder
55920
How do I set fish as the default shell?
48963
How do you remove a default program association for file types in Windows 7?
85706
How to set my default shell on Mac?
15817
How to make a particular app the default viewer / editor for ALL its supported file types at once?
19313
How to set PATH for Finder-launched applications
106046
How do I programmatically change file permissions?