root@OpenWrt:~# ipkg list_installed
ERROR: unknown sub-command `list_installed'

----

root@OpenWrt:~# ipkg upgrade
Assuming locally installed package kernel (2.4.30-brcm-3) is up to date
Package base-files (8) installed in root is up to date
Package base-files-brcm (2) installed in root is up to date
Package bridge (1.0.6-1) installed in root is up to date
Package busybox (1.00-3) installed in root is up to date
Package dnsmasq (2.27-1) installed in root is up to date
Package dropbear (0.48.1-1) installed in root is up to date
Package ipkg-sh (0.99.149-2) installed in root is up to date
Package iptables (1.3.3-2) installed in root is up to date
Package iwlib (28.pre7-1) installed in root is up to date
Package kmod-brcm-wl (2.4.30-brcm-3) installed in root is up to date
Package kmod-diag (2.4.30-brcm-3) installed in root is up to date
Package kmod-switch (2.4.30-brcm-1) installed in root is up to date
Package kmod-wlcompat (2.4.30-brcm-3) installed in root is up to date
Package mtd (4) installed in root is up to date
Package nvram (1) installed in root is up to date
Package uclibc (0.9.27-8) installed in root is up to date
Package wireless-tools (28.pre7-1) installed in root is up to date
Package wificonf (6) installed in root is up to date
Package kmod-ide (2.4.30-brcm-3) installed in root is up to date
Package kmod-ext3 (2.4.30-brcm-3) installed in root is up to date
Package portmap (5beta-2) installed in root is up to date
Package nfs-server (2.2beta47-2) installed in root is up to date
Assuming locally installed package mii-diag (2.09) is up to date
Package libgcc (3.4.4-8) installed in root is up to date
Package libncurses (5.2-7) installed in root is up to date
Package libpcap (0.9.4-1) installed in root is up to date
Package uclibc++ (0.1.11-2) installed in root is up to date
Package kismet-client (2005-08-R1-1) installed in root is up to date
Package kismet-server (2005-08-R1-1) installed in root is up to date
Package kismet (2005-08-R1-1) installed in root is up to date