Permissions

Created lørdag 22 oktober 2016

# To change permissions of a file/folder, use chmod
$ chmod who=<PERMISSIONS> <FILE_NAME>

# Who

u = user that owns the file
g = group the file belongs to
o = other users (everyone else)
a = all of the above (use instead of ugo)

# Permissions

r = read access
w = write access
x = execute-able

Basic Examples

$ chmod og=rx ~/Documents # owner and group gets read and execute access
$ chmod g= ~/Documents # no access for group (empty space means no access)

# You'll sometimes see numeric given permissions

r = 4 w = 2 x = 1

# So as an example, we could say

[owner] : rwx = 4+2+1 = 7
[group] : r-x = 4+0+1 = 5
[other] : r-x = 4+0+1 = 5

# Would be produced as
$ chmod 755 <FILE_NAME>

Bulk chmod

# chmod directories to 755 -type d for directory
$ find directory -type d -exec chmod 755 {} +

# chmod files to 644 -type f for files
$ find directory -type f -exec chmod 644 {} +

Change ownership

# Let's say we have a folder owned by root - maybe we created a new partition with gparted ex.
$ chown username /path/to/folder