linux chmod permissions
# syntax
# chmod *<Owner-digit>*<Group-digit>*<Others-digit> *<filename>
# example
chmod 777 FileForEveryone.txt
# --------------------------------------------------------------
# +-------------+---------+---------+---------+
# | Command | Owner | Group | Others |
# +-------------+---------+---------+---------+
# | chmod 777 | rwx | rwx | rwx |
# | chmod 666 | rw- | rw- | rw- |
# | chmod 555 | r-x | r-x | r-x |
# | chmod 444 | r-- | r-- | r-- |
# | chmod 333 | -wx | -wx | -wx |
# | chmod 222 | -w- | -w- | -w- |
# | chmod 111 | --x | --x | --x |
# | chmod 000 | --- | --- | --- |
# +-------------+---------+---------+---------+
# | chmod 776 | rwx | rwx | rw- |
# | chmod 766 | rwx | rw- | rw- |
# | chmod 765 | rwx | rw- | r-x |
# +-------------+---------+---------+---------+
# ENTITIES
# -------------------------------------------------- +
# Owner: User that created the file |
# Group: Users in the same group as the owner |
# Others: The rest of the users on the system |
# -------------------------------------------------- +
The three rightmost digits define permissions for the:
file user, the group, and others.
# Permission rwx Binary
7 read, write and execute rwx 111
6 read and write rw- 110
5 read and execute r-x 101
4 read only r-- 100
3 write and execute -wx 011
2 write only -w- 010
1 execute only --x 001
0 none --- 000
