将grep计数分配给变量
问题描述：
如何分配
grep -c "some text" /tmp/somePath
变成变量，以便我可以回显它.
into variable so I can echo it.
#!/bin/bash
some_var = grep -c "some text" /tmp/somePath
echo "var value is: ${some_var}"
我也尝试过:
some_var = 'grep -c \"some text\" /tmp/somePath'
但是我不断得到:command not found.
答
要分配命令的输出，请使用var=$(cmd)(如 shellcheck 自动告诉您是否将脚本粘贴到那里.
To assign the output of a command, use var=$(cmd) (as shellcheck automatically tells you if you paste your script there).
#!/bin/bash
some_var=$(grep -c "some text" /tmp/somePath)
echo "var value is: ${some_var}"