permissionsusers
I just got hold of a Linux machine running Ubuntu from my friend. It places 644 permission on all new files created by a user.
But for some purposes I want 755 permission on all files and folder created by that user, I have been searching on Internet from all day long but did not got hold of any useful resources plus I am a beginner to Linux system as well.
This was fixed by the user by setting the following file permissions using Webmin:
See:
Working out what a user can do is hard if you're not that user. You can test various things (is owner, same group, etc) but ACL might apply, there might be no permissions in the mount, who knows. It's hard.
If you can turn into that user, you can test -w <path> to see if they can write. This isn't as fast as just looking at the inode but it's possible with sudo.
sudo -u oli test -w <path> && echo "HOORAY"
We can then squirl that onto the back-end of find. Instead of just using -exec to change to the oli user over and over and over again (see past revisions), we pipe everything into a xargs instance running as oli. This is much faster.
sudo find / -type d -print0 | sudo -u oli xargs -0 -I{} sh -c 'test -w "$0" && echo "$0"' {}
A somewhat optimised (but visually flabbier) version of this involves minimising the amount of subshelling the xargs performs by piping a stream of paths into a low number of bash subshells. This is undoubtedly faster for big searches.
sudo find / -type d -print0 | sudo -u oli xargs -0 sh -c 'for p; do [ -w "$p" ] && echo "$p"; done' -
Best Answer
In the .profile of that user or in the global
/etc/profile, putNote to self: to get the umask, subtract the desired directory octal permissions from 777, so in that case 777-750 becomes 027. This should give
drwxr-x---.With that umask, the file creation mask will be 666-027 = 640 (note that this is not real subtraction, you subtract digit by digit); this will give
-rw-r-----.In short: you can read, write and change into directories; group can read and change into directories; anyone else is blocked. Is that correct?