1、ubuntu更新相关命令
列举本地更新： sudo apt-get update
安装可用更新： sudo apt-get upgrade
删除软件包： sudo apt-get remove package
查看ubuntu版本： cat /etc/issue 或者 lsb_release -a
升级ubuntu版本： sudo apt-get dist-upgrade
ubuntu 14.04更换为阿里云源：
（1）备份/etc/apt/sources.list,并将该文件的内容替换为以下内容：
deb http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse
2、查看文件系统
df -lhT
[root@k8s kubernetes]# df -lhT Filesystem Type Size Used Avail Use% Mounted on /dev/vda1 ext3 20G 5.3G 14G 29% / devtmpfs devtmpfs 1.9G 0 1.9G 0% /dev tmpfs tmpfs 1.9G 24K 1.9G 1% /dev/shm tmpfs tmpfs 1.9G 8.5M 1.9G 1% /run tmpfs tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup tmpfs tmpfs 380M 0 380M 0% /run/user/0
3、CentOS修改hostname
sudo hostnamectl set-hostname "XXX"
4、SSH Keys ArchLinux参考文档
https://wiki.archlinux.org/index.php/SSH_keys_(%E7%AE%80%E4%BD%93%E4%B8%AD%E6%96%87)
5、Linux查看内存占用率
monster@monster-Z:~$ free -h
total used free shared buffers cached
Mem: 7.7G 5.6G 2.2G 199M 388M 1.9G
-/+ buffers/cache: 3.3G 4.5G
Swap: 7.9G 0B 7.9G