ubuntu apt-upgrade 报错E: Could not get lock /var/lib/dpkg/lock

使用apt-get update 命令后执行apt-get upgrade报错

E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?

看报错信息是获取不到锁，查了网上几种解决方法

1.杀进程

ps -ef|grep apt

找到和apt相关进程直接kill

2.删锁

根据报错提示找到对应路径（/var/lib/dpkg/lock-frontend）直接rm

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保险起见，查看进程中发现apt有如下进程

root     23463     1  0 06:23 ?        00:00:00 /bin/s