sed可谓大名鼎鼎
root@OpenWrt:~# `echo ".dd60:85d9:6b37::/48" | sed 's/^./d/'`-ash: ddd60:85d9:6b37::/48: not foundroot@OpenWrt:~# `echo "..dd60:85d9:6b37::/48" | sed 's/^./d/'`-ash: d.dd60:85d9:6b37::/48: not found