Free Software Server Environment: chmod

chmod

change permissions

ugo +=- rwx

you can change permissions for the (u)ser, (g)roup, (o)others or (a)ll

$ chmod ugo+rwx *

ugo +=- ugo

propagate user permissions to group

$ chmod g+u *

propagate user permissions to all

$ chmod a+u *

ugo +=- st

the group sticky bit on a directory allows a group or team to share files on a server

$ chmod g+rws shareddir

make sure the directory group sticky bit is set on any shared directories
(so that any new files you create are owned by the group)

verify

verify your directory sticky bit

$ ls -ld myshareddir
drwxrwsr-x 2 www-data www-data 4096 2007-09-20 09:42 myshareddir

umask

make sure your UMASK is set to 0002 in ~/.bashrc (or in /etc/bashrc /etc/profile or /etc/login.defs so that any new files you create are group writable)

verify

view your umask

$ umask
0002

REFERRERS
SystemSecurity