It could be files you have deleted but are still opened by some processes, space will be freed after those processes close these files. You can use lsof to check what files are opened by what process.
If you don't have sftp-server installed, you can just use SCP protocol (instead of SFTP), of course, you need to find a client that supports SCP, for example, winscp:
https://winscp.net/eng/docs/scp
You can also use VPN services such as Zerotier (free), or hamachi (not free), in this case you don't have to install/run VPN server, just run client.
Zerotier client is open source, I compiled my client running on my ASUS router.
Sometimes the error "not found" really means "failed to load the executable".
Try some tools such as
ldd /opt/bin/automake
strace /opt/bin/automake
and check if there are any problems.
I don't quite understand your question here... Check your /etc/profile, if it source...
Sorry I just realized you are running optware, not optware-ng.
What's in your /mmc/usr/bin and /mmc/usr/sbin? optware-ng does not have /opt/usr/bin and /opt/usr/sbin, I am not sure optware though, do you want to move /opt/sbin:/opt/bin: before /mmc/usr/bin:/mmc/usr/sbin: and try again?
maybe try to upgrade to newer automake? mine is 1.15-4
on my router (optware-ng):
# ipkg list | grep ^automake
automake - 1.15-4 - Creates GNU standards-compliant Makefiles from template files
automake1.10 - 1.10.3-3 - Creates GNU standards-compliant Makefiles from template files
automake1.14...
The time is set by init(rc), see rc's source code, common.c:setup_timezone().
For RT-AC66U, if system time is before RC_BUILDTIME (Aug 1 00:00:00 GMT 2015) then it is set to RC_BUILDTIME.
I also have problems with Comcast's IPv6
I am currently a Comcast Home Business user, and using Comcast's SMC (modem+router) for getting a static external IP.
SMC's LAN1: any computer in this LAN gets working IPv6 IP correctly, e.g., Windows OS reports "IPv6 connectivity: internet", my ASUS...
use downforeveryoneorjustme.com (aka isup.me) to check sites:
http://www.downforeveryoneorjustme.com/http://www.hqt.ro/
http://www.isup.me/http://www.hqt.ro/