Linux 下常见问题总结

1.换源

编辑sources.list文件：

sudo gedit /etc/apt/sources.list

将内容替换成阿里源：

deb http://mirrors.aliyun.com/ubuntu/ trusty main multiverse restricted universedeb http://mirrors.aliyun.com/ubuntu/ trusty-backports main multiverse restricted universedeb http://mirrors.aliyun.com/ubuntu/ trusty-proposed main multiverse restricted universedeb http://mirrors.aliyun.com/ubuntu/ trusty-security main multiverse restricted universedeb http://mirrors.aliyun.com/ubuntu/ trusty-updates main multiverse restricted universedeb-src http://mirrors.aliyun.com/ubuntu/ trusty main multiverse restricted universedeb-src http://mirrors.aliyun.com/ubuntu/ trusty-backports main multiverse restricted universedeb-src http://mirrors.aliyun.com/ubuntu/ trusty-proposed main multiverse restricted universedeb-src http://mirrors.aliyun.com/ubuntu/ trusty-security main multiverse restricted universedeb-src http://mirrors.aliyun.com/ubuntu/ trusty-updates main multiverse restricted universe

最后进行更新源：

sudo apt-get update

2.查看并解除端口占用

由于在服务器中经常写socket的程序，有时候ctrl+c以后重新运行提示端口被占用，如果等候或者重启的话就很麻烦了，解决办法就是查看端口占用并解除。

查看指定端口，可以结合grep命令：

netstat -ap | grep 6666

也可以使用lsof命令：

lsof -i:6666

若要关闭使用这个端口的程序，使用kill + 对应的pid

kill -9 PID号

ps：kill就是给某个进程id发送了一个信号。默认发送的信号是SIGTERM，而kill -9发送的信号是SIGKILL，即exit。exit信号不会被系统阻塞，所以kill -9能顺利杀掉进程。

3.apt-install 出现以下错误：

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

解决：

sudo rm /var/cache/apt/archives/locksudo rm /var/lib/dpkg/lock