My chmod usage generally looks like this: chmod a-rwx,u+rw,g+r,o+r filename a/u/g/o is all, user, group, other. - removes, + adds. r/w/x is read, write, execu

My chmod usage generally looks like this: chmod a-rwx,u+rw,g+r,o+r filename a/u/g/o is all, user, group, other. - removes, + adds. r/w/x is read, write, execute (of course).