Change Permissions of files (chmod)

Here's another from my scrap notes.

chmod 000 filename.abc

(defaults are usually 755 for folders, 644 for files)

Numbers correspond to users. 1st=Owner; 2nd=Group; 3rd=Other
(-rwxrwxwrx = 777, -rwxr-xr-x = 755, -rw-r--r-- = 644, etc.)
7 = Read + Write + Execute
6 = Read + Write
5 = Read + Execute
4 = Read
3 = Write + Execute
2 = Write
1 = Execute
0 = All access denied