Editing User:DarkShadow/Other Crap (section)

===Commands===
nvram size and amount free
 nvram show|grep free

ext filesystem support
 ls -R /lib/modules/ | grep ext

'''In the My Page thread redhat27 wrote:'''<br />
...and with no nvram commits:

I noticed that the script permissions were properly set by default in the tarball.

So, a super easy way to 'install' the my page script files is just copy the tarball mypage-files-v0.16-20100129-00520.tgz over to your persistent storage (I used /jffs/store) and have this as part of your startup script:

 myPage="/jffs/store/mypage-files-v0.16-20100129-00520.tgz"
 if [ -e "$myPage" ]; then
   tar -C /tmp/www -xzf $myPage
   for pageIndex in 1 2 3 4 5 6 7 8 9 10 11 12
   do
     pages="${pages} /tmp/www/mypage${pageIndex}.sh"
   done
   nvram set mypage_scripts="`echo $pages`"
 fi


Of course you may wish to install less: just remove the relevant page indexes.<br />
'''corerev comand'''
 nvram show|grep corerev
If you have a dual radio, you will see wl0 & wl1. If you have a single radio, wl0 will contain the corerev.

'''wl commands'''<br />
 Put simply, always specify the interface.
 wl -i `nvram get wl0_ifname` [rest of command]

 wl -i `nvram get wl0_ifname` cap = Wireless capabilities. example:
 
 Asus RT-N16
  wl -i eth1 cap = Wireless Capabilities of radio at "eth1"
 Netgear WNDR3300
  wl -i eth2 cap = Wireless Capabilities of radio at "eth2"
  wl -i eth3 cap = Wireless Capabilities of radio at "eth3"

reference: [[dd-wrt-wiki:Wl_command Wl command]

'''Getting the current up and down bandwidth'''

If anyone is interested u can get the amount sent and received by using grep and ifconfig:

 RX=`ifconfig br0 | grep "RX bytes:" | cut -d ':' -f2 | cut -d "(" -f1 | tr -d ' '`
 TX=`ifconfig br0 | grep "RX bytes:" | cut -d ':' -f3 | cut -d "(" -f1 | tr -d ' '`

If you can get the amount sent then u can get the current by just doing it again and subtracting them

http://www.dd-wrt.com/phpBB2/viewtopic.php?t=90467

'''USB HDD spindown'''
 echo 1 > /sys/block/sda/device/scsi_disk:0:0:0:0/allow_restart