linux - Bash 脚本 - Crontab 完成 bash 脚本的一部分但不是全部

Question

下面的 bash 脚本在 L1 上每 10 分钟运行一次，脚本中的目的是生成一个随 secret 码，然后将其打印到一个文件中，然后将其复制到 L2。

#!/bin/bash
targetFile="testfilegen2.log"
address="192.168.1.1"
netmask="255.255.255.0"
channel="1"
essid="GreRPi"
random=$(pwgen 13 -1)
        sudo echo "source-directory /etc/network/interfaces.d" > "$targetFile"
        sudo echo "auto lo" >> "$targetFile"
        sudo echo "auto wlan0" >> "$targetFile"
        sudo echo "allow-hotplug wlan0" >> "$targetFile"
        sudo echo "iface wlan0 inet static" >> "$targetFile"
        sudo echo "address $address" >> "$targetFile"
        sudo echo "netmask $netmask" >> "$targetFile"
        sudo echo "wireless-channel $channel" >> "$targetFile"
        sudo echo "wireless-essid $essid" >> "$targetFile"
        sudo echo "wireless-mode ad-hoc" >> "$targetFile"
        sudo echo "wireless-key s:$random" >> "$targetFile"
        sleep 1
        scp "$targetFile" pi@192.168.1.1:~/.ssh/
        sudo service networking restart

Unfornaltey L1 似乎没有收到新密码，但 L2 收到了。

L1输出

pi@raspberrypi:/etc/greenwich $ cat testfilegen2.log
source-directory /etc/network/interfaces.d
auto lo
auto wlan0
allow-hotplug wlan0
iface wlan0 inet static
address 192.168.1.1
netmask 255.255.255.0
wireless-channel 1
wireless-essid GreRPi
wireless-mode ad-hoc
wireless-key s:she5Bie1ojoon

L2输出

pi@raspberrypi:~/.ssh $ cat testfilegen2.log
source-directory /etc/network/interfaces.d
auto lo
auto wlan0
allow-hotplug wlan0
iface wlan0 inet static
address 192.168.1.1
netmask 255.255.255.0
wireless-channel 1
wireless-essid GreRPi
wireless-mode ad-hoc
wireless-key s:ez2eeCeich0oc

有什么建议吗？

谢谢

Answer 1

正如 Vikas Tiwari 所指出的，重定向发生在当前用户 before sudo 运行时。您需要使用 sudo 打开文件。这可以通过 tee 程序来完成，您只需运行该程序一次。

targetFile="testfilegen2.log"
address="192.168.1.1"
netmask="255.255.255.0"
channel="1"
essid="GreRPi"
random=$(pwgen 13 -1)
{
    echo "source-directory /etc/network/interfaces.d"
    echo "auto lo"
    echo "auto wlan0"
    echo "allow-hotplug wlan0"
    echo "iface wlan0 inet static"
    echo "address $address"
    echo "netmask $netmask"
    echo "wireless-channel $channel"
    echo "wireless-essid $essid"
    echo "wireless-mode ad-hoc"
    echo "wireless-key s:$random"
} | sudo tee "$targetFile" > /dev/null
    sleep 1
    scp "$targetFile" pi@192.168.1.1:~/.ssh/
    sudo service networking restart