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post_install() { if [ -z "`grep '^ushare:' /etc/group`" ]; then groupadd -r ushare fi if [ -z "`grep '^ushare:' /etc/passwd`" ]; then useradd -r -d /var/empty -g ushare -s /sbin/nologin ushare fi } post_upgrade() { post_install $1 } post_remove() { userdel ushare }