script shell：告诉用户登录的次数

Question

我有以下内容：

count=$(who | grep $user | wc -l)
echo "$user is logged on $count times."

but it gives me the following output:
 is logged on      0 times.

我在这里想念的是什么？ 感谢任何帮助

Answer 1

您使用的是$USER，但需要count=$(who | grep $USER | wc -l) echo "$USER is logged on $count times." 。像，

efrisch is logged on 4 times.

我得到了

printf

另一个选项是printf "%s is logged on %s times.\n" $USER $(who | grep $USER | wc -l) ，如

#!/bin/bash -i

# Expand aliases defined in the shell ~/.bashrc
shopt -s expand_aliases

得到相同的结果。