chmod
change permissionsugo +=- 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
