Revisar cantidad de memoria RAM:

free

Entrar en la carpeta de RAMDISK

cd /tmp

Descargar la versión que requieres:

wget http://downloads.openwrt.org/snapshots/trunk/PLATFORM/xxx-sysupgrade.bin

Instalar con sysupgrade:

sysupgrade -v /tmp/openwrt-ar71xx-generic-wzr-hp-ag300h-squashfs-sysupgrade.bin

La salida debe dar:

root@openwrt:/tmp$ sysupgrade -v openwrt-ar71xx-generic-tl-wr1043nd-v1-squashfs-sysupgrade.bin
Saving config files…
root/zeit
root/statistics
root/quelen
root/auswurfeln
etc/sysupgrade.conf
etc/sysctl.conf
etc/shells
etc/rc.local
etc/TC_hfsc.sh
etc/profile
etc/passwd
etc/inittab
etc/init.d/trafficc
etc/hotplug.d/iface/30-trafficc
etc/hosts
etc/group
etc/firewall.user
etc/dropbear/dropbear_rsa_host_key
etc/dropbear/dropbear_dss_host_key
etc/crontabs/root
etc/config/wireless
etc/config/timeserver
etc/config/system
etc/config/network
etc/config/firewall
etc/config/dropbear
etc/config/dhcp
etc/collectd.conf
Switching to ramdisk…
Performing system upgrade…
Unlocking firmware …

Writing from to firmware …
Appending jffs2 data from /tmp/sysupgrade.tgz to firmware…TRX header not found
Error fixing up TRX header

Writing from to firmware …
Upgrade completed
Rebooting system…

Fuente: http://wiki.openwrt.org/doc/howto/generic.sysupgrade

• enrutador,
• linux,
• openwrt,
• opkg,
• router,
• sysupgrade,
• upgrade