今日排错---python3无法使用yum命令

cd /usr/bin
ls yum* | xargs -l sed -i 's@#!/usr/bin/python@#!/usr/bin/python2@'
ls yum* | xargs -l grep "python"
sed -i 's@#!/usr/bin/python@#!/usr/bin/python2@' /usr/libexec/urlgrabber-ext-down