bash 如何在shellscripting中将命令结果存储在变量中？
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How to store command results in a variable in on shellscripting?
提问by Rahul KP
I want to find out number of directories and files in home directory and want to store count some variable in a shell script. I am using following set of commands.
我想找出主目录中目录和文件的数量，并想在 shell 脚本中存储一些变量。我正在使用以下命令集。
command="ls -l | grep -c \"rahul.*patle\""
eval $command
i want to store this count into some varibale count. How can i do this.
我想将此计数存储到一些可变计数中。我怎样才能做到这一点。
回答by fedorqui 'SO stop harming'
The syntax to store the command output into a variable is var=$(command).
将命令输出存储到变量中的语法是var=$(command).
So you can directly do:
所以你可以直接这样做：
result=$(ls -l | grep -c "rahul.*patle")
And the variable $resultwill contain the number of matches.
变量$result将包含匹配的数量。
