Linux tips

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：

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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

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[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

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1	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

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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