相关疑难解决方法(0)

#!/bin/sh
for i in {1..5}
do
   echo "Welcome"
done

会工作,显示欢迎5次.

#!/bin/sh
howmany=`grep -c $1 /root/file`
for i in {1..$howmany}
do
   echo "Welcome"
done

Doesn't work! howmany would equal 5 as that is what the output of grep -c would display. $1 is parameter 1 which is specific when running the script.

Any ideas?