I get this a ton while running the AICCU program. sh: ip: command not found sh: ip: command not found sh: ip: command not found sh: ip: command not found sh: ip: command not found sh: ip: command not found I have other connectivity issues that are keeping my tunnel from actually working - but they're my issues w/ connectivity in general (linksys router being a pain with proto41). With none of the ip commands being run, the tunnel itself is never created. i do create it by hand and it comes up no problem (see below). I'm running CentOS 5.3 and I know the ip commands do work because thats how I set the tunnel up. I obtained AICCU via yum using the EPEL Fedora repository. [tmyoungjr@alpha sbin]$ sudo ip tunnel add sixxs-ipv6 mode sit remote 216.14.98.22 local 192.168.1.201 ttl 255 [tmyoungjr@alpha sbin]$ sudo ip link set sixxs-ipv6 up [tmyoungjr@alpha sbin]$ sudo ip addr add 2001:4978:f:39e::2/64 dev sixxs-ipv6 [tmyoungjr@alpha sbin]$ ip -f inet6 addr 8: sixxs-ipv6@NONE: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1480 inet6 2001:4978:f:39e::2/64 scope global valid_lft forever preferred_lft forever inet6 fe80::c0a8:1c9/128 scope link valid_lft forever preferred_lft forever my aiccu start / test commands are run using sudo so they have all of the privileges needed. is there anything i can do - is this common? thanks. I have searched the forums and not found much either.