printf "%-30s:%-15s\n" report_selinux_enable $report_selinux_enable

printf "%-30s:%-15s\n" report_selinux_status $report_selinux_status

printf "%-30s:%-15s\n" report_os $report_os

printf "%-30s:%-15s\n" report_hostname $report_hostname

printf "%-30s:%-15s\n" report_kernel $report_kernel

printf "%-30s:%-15s\n" report_uptime $report_uptime

printf "%-30s:%-15s\n" report_date_time $report_date_time

輸出：

report_selinux_enable :disabled

report_selinux_status :Disabled

report_os :GNU/Linux

report_hostname :centos.com

report_kernel :3.10.0-693.2.2.el7.x86_64

report_uptime :42

days :

report_date_time :2018-07-18-20-24-23

可以看出輸出的在線天數（report_uptime）的值是42（本來是42 days），下面還有一行顯示的有問題，把一行拆成了兩行顯示，是因為report_uptime的值中間有空格，所以被拆成兩行

解決：printf語句後面的引用值要放在""中

printf "%-30s:%-15s\n" report_uptime "$report_uptime"

printf "%-30s:%-15s\n" "report_selinux_enable" "$report_selinux_enable"

printf "%-30s:%-15s\n" "report_selinux_status" "$report_selinux_status"

printf "%-30s:%-15s\n" "report_os" "$report_os"

printf "%-30s:%-15s\n" "report_hostname" "$report_hostname"

printf "%-30s:%-15s\n" "report_kernel" "$report_kernel"

printf "%-30s:%-15s\n" "report_uptime" "$report_uptime"

printf "%-30s:%-15s\n" "report_uptime" "$report_date_time"

report_selinux_enable :disabled

report_selinux_status :Disabled

report_os :GNU/Linux

report_hostname :centos.com

report_kernel :3.10.0-693.2.2.el7.x86_64

report_uptime :42 days

report_date_time :2018-07-18-20-27-40

喜歡的點點關註，點點贊。

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shell的printf輸出時包含空格問題