--- layout: default navsection: installguide title: Create standard objects ... Next, we're going to use the Arvados CLI tools on the shell server to create some standard objects. h3. "All users" group The convention is to add every active user to this group. We give it a distinctive UUID that looks like an IP broadcast address.

~$ prefix=`arv --format=uuid user current | cut -d- -f1`
~$ echo "Site prefix is '$prefix'"
~$ read -rd $'\000' newgroup <<EOF; arv group create --group "$newgroup"
{
 "uuid":"$prefix-j7d0g-fffffffffffffff",
 "name":"All users"
}
EOF

h3. "arvados" repository This will be readable by the "All users" group, and therefore by every active user. This makes it possible for users to run the bundled Crunch scripts by specifying @"script_version":"master","repository":"arvados"@ rather than pulling the Arvados source tree into their own repositories.

~$ prefix=`arv --format=uuid user current | cut -d- -f1`
~$ echo "Site prefix is '$prefix'"
~$ all_users_group_uuid="$prefix-j7d0g-fffffffffffffff"
~$ repo_uuid=`arv --format=uuid repository create --repository '{"name":"arvados"}'`
~$ echo "Arvados repository uuid is '$repo_uuid'"
~$ read -rd $'\000' newlink <<EOF; arv link create --link "$newlink"
{
 "tail_uuid":"$all_users_group_uuid",
 "head_uuid":"$repo_uuid",
 "link_class":"permission",
 "name":"can_read" 
}                                         
EOF