linux三剑客之一 sed

sed可谓大名鼎鼎

 

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