0 400   0   echo $*
 0 400   0   echo $@
 0 400   0   echo $?
 0 400   0   echo $-
 0 400   0   echo $$
 0 400   0   echo $!
 0 400   0   echo $_
 0 400   0   echo $%
 0 400   0   echo $<
 1 400   0   
 0 400   0   ifeth=$(ls /sys/class/net | grep ^"$intf" | grep "$intf"$)
 0 400   0