我执行了导入公钥的前两个步骤，方法是：
prachi@prachi-3000-N100:~$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
[sudo] password for prachi:
Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.z5S9qmVca3 --trustdb-name /etc/apt//trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
gpg: requesting key 7F0CEB10 from hkp server keyserver.ubuntu.com
gpg: key 7F0CEB10: "Richard Kreuter <[email protected]>" not changed
gpg: Total number processed: 1
gpg: unchanged: 1
然后第二步是列出 mongo 的文件；
prachi@prachi-3000-N100:~$ echo 'deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen' | sudo tee /etc/apt/sources.list.d/mongodb.list
deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen
然后在第三步，即重新加载存储库时，显示此错误：
prachi@prachi-3000-N100:~$ sudo apt-get update
E: Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/lib/apt/lists/
出了什么问题？？请帮忙
答案1
您拥有另一个可能正在运行或已终止的 apt-get 进程的锁。
检查是否有任何正在运行
ps aux | grep apt
如果什么都没有运行，请移除可能存在的锁
sudo rm /var/lib/apt/lists/lock
sudo rm /var/cache/apt/archives/lock