((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9]) \.){3}(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9]) 不知道能不能匹配
2018-10-23
df -h | grep "vda1" | awk '{print $5}' | sed 's/%//'
2018-04-02
df -h | grep "vda1" | awk '{print $5}' | cut -d "%" -f 1
2018-04-02