第 53 天 - 研究 shell 解释器 - for each 批量停用没有用到服务

测试开放外网的时候，使用 netstat -tlunp 追查开放的 port 的服务

test@test:~$ netstat -tlunp
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN      -
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      -
tcp        0      0 127.0.0.1:43769         0.0.0.0:*               LISTEN      -
tcp6       0      0 :::22                   :::*                    LISTEN      -
udp        0      0 127.0.0.53:53           0.0.0.0:*                           -
udp        0      0 172.20.175.32:68        0.0.0.0:*                           -

找到对应的启动脚本，进行停用

test@test:~$ cd /etc/init.d/
test@test:/etc/init.d$ ls
apparmor  cgroupfs-mount    cryptdisks        grub-common  iscsid             lvm2             open-iscsi     plymouth-log  rsyslog         ubuntu-fan  unattended-upgrades
apport    console-setup.sh  cryptdisks-early  hwclock.sh   keyboard-setup.sh  lvm2-lvmpolld    open-vm-tools  procps        screen-cleanup  udev        uuidd
atd       cron              dbus              irqbalance   kmod               multipath-tools  plymouth       rsync         ssh             ufw

结合昨天学的 bash 功能，批量停用

#!/bin/bash
services="想停用的服务" # 像是 "NetworkManager autofs "
for service in ${services}
do
    echo 'stop' ${service} 'service'
    /etc/init.d/${service} stop
done

批量 for each 例子

#!/bin/bash
arr="1 2 3 4 5 6 7 8 9"
for a in $arr
do 
    echo $a
done

明天进度 : 鸟哥的 Linux 私房菜 -- DRBL 与 Clonezilla 再生龙

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