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Lubuntu cronjob；无法运行其他脚本或查看路线

tag-icon • tag-icon shell cron lubuntu
Lubuntu cronjob；无法运行其他脚本或查看路线

我在虚拟机中运行 Lubuntu 并尝试设置一个每分钟运行一次的脚本来检查 VPN 是否处于活动状态，如果不是，它会关闭所有内容并再次打开。当我手动运行脚本时，一切都按预期工作，但是当设置为 cronjob 时，它几乎每次都会失败。

首先是它无法检测路由表。当手动运行时，它可以看到隧道，但当作为 cron 运行时，它会失败并尝试退出所有内容。

第二个是它无法执行附加脚本/程序设置。它到达“启动 vpn”的点，然后退出，任何输出总是在此停止，但仅作为 cron，手动运行它启动 vpn 程序。

我似乎也无法将输出重定向到文件，除非我将每个 echo 语句附加 >>/h​​ome/localuser1/aqlog.txt。将其添加到 cron 命令中不会执行任何操作。

#!/bin/bash
PATH=/home/localuser1/bin:/home/localuser1/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/jvm/java-8-oracle/bin:/usr/lib/jvm/java-8-oracle/db/bin:/usr/lib/jvm/java-8-oracle/jre/bin

echo "-----------------------------------Script started  $(date)"

echo "Check VPN"
if [route | grep tun0 -c ]; then
    echo "VPN running, check qbit"
    if [pgrep qbit ]; then
        echo "All active, no action needed"
    else
        echo "Not active, starting qbit"
        nohup /usr/bin/qbittorrent >/dev/null &
    fi
else
    echo "no VPN, killing all"
    pkill qbit
    pkill pia
    sleep 2
    echo "Starting VPN"
    nohup /home/localuser1/.pia_manager/pia_manager/run.sh >/dev/null &
    echo "Waiting for VPN to start" 
    sleep 15
    echo "Check VPN active"
    if [route | grep tun0 -c]; then
        echo "VPN active, starting qbit"
        nohup /usr/bin/qbittorrent >/dev/null &
    else
        echo "No VPN, end of script"
        fi
fi
echo "Exiting script"

我还在 crontab 中进行了以下设置，其中 autoquit.sh 是上面脚本的任意名称：

# m h  dom mon dow   command
* * * * * /home/localuser1/autoquit.sh

答案1

好吧，多亏了 Reddit 上一位乐于助人的用户，我才找到了答案，所以我想在这里发帖，以防有人遇到同样的障碍。问题是我试图通过 cron 启动一个 GUI 程序，它没有传递 ENV var，这意味着它无法知道在哪里显示。一旦我通过添加 DISPLAY=:0这个有用的论坛它完全按照预期工作，现在启动程序。

固定代码如下：

#!/bin/bash
PATH=/home/localuser1/bin:/home/localuser1/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/jvm/java-8-oracle/bin:/usr/lib/jvm/java-8-oracle/db/bin:/usr/lib/jvm/java-8-oracle/jre/bin

echo "-----------------------------------Script started  $(date)" >>/home/localuser1/aqlog.txt

echo "Checking VPN status" >>/home/localuser1/aqlog.txt
vpnstatus="$(route | grep tun0 -c)"
if [ "$vpnstatus" -gt "0" ]; then
    echo "VPN is running, checking qbit" >>/home/localuser1/aqlog.txt
    qbitstatus="$(pgrep qbit)"
    if [ -n "$qbitstatus" ]; then
        echo "All active, no action needed" >>/home/localuser1/aqlog.txt
    else
        echo "Not active, starting qbit" >>/home/localuser1/aqlog.txt
        nohup qbittorrent >/dev/null &
    fi
else
    echo "no VPN, killing all" >>/home/localuser1/aqlog.txt
    pkill qbit
    pkill pia
    sleep 2
    echo "Starting VPN" >>/home/localuser1/aqlog.txt
    nohup /home/localuser1/.pia_manager/pia_manager/run.sh >/dev/null &
    echo "Waiting for VPN to start"  >>/home/localuser1/aqlog.txt
    sleep 15
    echo "Checking if VPN is active" >>/home/localuser1/aqlog.txt
    vpnstatustwo="$(route | grep tun0 -c)"
    if [ "$vpnstatustwo" -gt "0" ]; then
        echo "VPN is active, starting qbit" >>/home/localuser1/aqlog.txt
        nohup qbittorrent >/dev/null &
    else
        echo "No VPN, end of script" >>/home/localuser1/aqlog.txt
    fi
fi
echo "Exiting script" >>/home/localuser1/aqlog.txt

修复了 cron 作业：

# m h  dom mon dow   command
* * * * * export DISPLAY=:0 && /home/localuser1/autoquit.sh >> /home/localuser1/script_output.txt 2>&1

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