我想将稍后使用的命令存储在变量中(不是命令的输出,而是命令本身)。
我有一个简单的脚本如下:
command="ls"; echo "Command: $command"; #Output is: Command: ls b=`$command`; echo $b; #Output is: public_html REV test... (command worked successfully)
但是,当我尝试一些更复杂的东西时,它会失败。例如,如果我使
command="ls | grep -c '^'";
输出是:
Command: ls | grep -c '^' ls: cannot access |: No such file or directory ls: cannot access grep: No such file or directory ls: cannot access '^': No such file or directory
如何将这样的命令(使用管道/多个命令)存储在变量中以供以后使用?
使用评估:
x="ls | wc" eval "$x" y=$(eval "$x") echo "$y"